CRAFTSMAN 917.370680 Service Manual

Overview and safety information

The purpose of this manual is to provide detailed, technical guidance for the maintenance, adjustment, troubleshooting, and repair of the CRAFTSMAN 917.370680 power equipment. It is intended for trained technicians and experienced hobbyists who require precise procedures and specifications to ensure safe and effective operation. This section lays out the foundational information that supports all subsequent service work, including how to interpret model-specific components, access service data, and follow recommended practices for reliability and performance. By understanding the intended use, operating conditions, and limitations of the equipment, technicians can approach repairs methodically and reduce the risk of improper reassembly or unsafe operation after service. Clear adherence to the procedures described helps preserve manufacturer expectations for function, warranty eligibility, and safety compliance.

Safety is emphasized throughout every maintenance activity to prevent injury to personnel and damage to equipment. Before performing any service, disconnect the power source and remove the spark plug wire or battery as appropriate to eliminate the risk of inadvertent startup. Wear appropriate PPE, including eye protection, gloves, and protective footwear, and ensure the work area is well-ventilated and free of ignition sources when dealing with fuel systems. Follow torque specifications precisely and use calibrated tools to avoid overtightening that could crack housings or strip threads. If unusual noises, vibrations, or overheating occur during service, halt work, reassess the situation, and consult more detailed diagnostic steps before continuing.

Tools and access to service information are essential for safe and accurate maintenance. The manual provides access to torque values, part numbers, calibration procedures, and alignment checks that are specific to the 917.370680 model. It is important to use the correct manufacturer-approved tools and replacements to maintain performance and emissions standards. When disassembling components, document the order of parts and preserve fastener placement to ensure correct reassembly. For some procedures, specialized fixtures or adapters may be required to support components during service; use them as intended to prevent damage and ensure precise results. Always verify that you have the latest service data from the manufacturer or authorized distributors before performing complex repairs.

Maintenance schedules and safety gear are outlined to keep the equipment in peak condition while minimizing risk. Routine checks should cover air filters, fuel lines, ignition components, and lubrication points, with intervals defined by operating hours or usage conditions. Adhering to scheduled maintenance reduces the likelihood of unexpected failures and extends the life of critical components. When performing maintenance, select the appropriate personal protective equipment and ensure fire safety considerations are met, especially when handling fuel and hot surfaces. The guidance also stresses documenting maintenance activities, noting any deviations from standard procedures, and updating service records to support traceability and future diagnostics.

Product background and specifications

The CRAFTSMAN 917.370680 is a compact outdoor power equipment unit designed for homeowner-level lawn maintenance tasks. It is intended for tasks such as mowing, mulching, and light yard cleanup, offering a balance of maneuverability and functionality for residential properties. The machine emphasizes ease of use, straightforward maintenance, and the ability to perform routine yard work without requiring professional service. This model is typically operated by individuals with basic mechanical knowledge, with a design that prioritizes user safety, simple start-up procedures, and serviceability in a home workshop setting. Its construction supports common maintenance practices, enabling owners to perform regular inspections, part replacements, and routine tuning as part of a seasonal care cycle.

Key to understanding the 917.370680 is recognizing its intended use as a versatile, all-season yard tool rather than a heavy-duty commercial unit. While it can handle a variety of tasks, it is optimized for residential lawns and gentle terrain. The equipment relies on standard components and interfaces that are commonly found across similar models, which simplifies parts sourcing and repair procedures. Owners should approach operation with respect to local environmental conditions and manufacturer guidelines to maximize efficiency, minimize wear, and maintain consistent performance throughout the product’s service life. Proper storage and seasonal maintenance play a crucial role in preserving the machine’s reliability and fuel efficiency year after year.

The model is designed to be user-friendly while providing robust performance within its class. Its controls and protective features are arranged to limit operator exposure to moving parts and to reduce the risk of accidental start-up. The overall layout supports quick visual checks of essential systems, including the engine, cutting deck, and drive mechanisms. Regular inspection of belts, fasteners, and safety switches is recommended to ensure continued safe operation. The combination of practical design and accessible serviceability makes the 917.370680 a practical option for homeowners who want dependable yard care without frequent professional intervention.

Identification and model information for the 917.370680 includes a serial number and production date that are critical for accurate parts matching and warranty validation. When performing maintenance or ordering replacement components, always verify the exact model and serial number to avoid compatibility issues. The unit’s labeling should be checked for safety instructions, unit weight, and recommended service intervals. Documenting the identification data during initial setup can help track service history, facilitating better long-term reliability and easier troubleshooting should issues arise. This practice supports more efficient maintenance planning and helps ensure the machine remains within safe operating parameters.

Recommended fluids and lubricant types for the 917.370680 follow manufacturer guidelines to optimize performance and prolong component life. Use the recommended engine oil grade and capacity as specified in the manual, and adhere to intervals for oil changes aligned with operating hours or seasonal use. For fuel systems, use the specified fuel type and octane rating to maintain reliable starting and smooth engine operation. Lubricants for the drive system, cutting deck, and linkage should be selected to match viscosity and environmental conditions, with attention paid to any seasonal changes that may affect viscosity. Always use fresh, clean lubricants and replace seals and gaskets when performing maintenance to prevent leaks and contamination that can degrade performance. Proper fluids management contributes to consistent cutting quality, reduced wear, and overall longevity of the unit.

The initial inspection begins with a careful unpacking and visual survey of the equipment. Place the unit on a clean, flat work surface and remove all packaging materials, labels, and protective covers present from the factory. Inspect the exterior for any signs of shipping damage, loose components, or missing fasteners. Check for corrosion, bent brackets, or cracked housings, and verify that all guards and safety devices are present and undamaged. Document any discrepancies with clear notes and photographs to assist subsequent service steps or warranty claims.

Before applying power or performing any tests, conduct a comprehensive safety check to ensure that all personal protective equipment is available and in good condition. Confirm that the ignition system, spark plug boots, fuel lines, and air filter housing are secure and free from cracks or deterioration. Ensure that the starter cord, pulleys, and belt drive are aligned properly and move freely without binding. Verify that the muffler and cooling fins are intact and unobstructed, and that the shutdown switch is functional. A thorough safety assessment reduces the risk of injury during initial operation and helps identify latent faults early.

Stored energy and component safeguards require special attention to prevent unexpected releases or hazardous conditions. Relieve any stored tension in belts and springs according to the manufacturer’s guidelines before handling the unit. Inspect the blade or cutting attachments, if applicable, for proper mounting and balance, and confirm that any automatic shutoffs or interlocks engage correctly when operated. If the machine contains a battery, check the voltage, terminals, and insulation for signs of corrosion, cracking, or loose connections. Ensure that fuel systems are secure and free from leaks, and disconnect the spark plug wire when performing non-operational checks to prevent accidental starting.

Documentation and service history are essential for traceability and future maintenance planning. Gather all available manuals, warranty cards, and previous service records, noting dates of service, parts replaced, and observed issues. Update the service log with findings from the initial inspection, including any corrective actions taken and recommendations for further diagnostics. If the unit was previously serviced by an authorized center, retrieve any calibration data, torque specifications, and part numbers to ensure consistency with OEM specifications. Maintaining complete records supports accurate diagnostics and helps sustain optimal performance over the life of the tool.

Engine model overview: The engine in the CRAFTSMAN 917.370680 is a small, air-cooled powerplant designed for reliability in outdoor power equipment. Start by identifying the exact engine model and displacement, noting any serial numbers or revision marks on the blower housing or valve cover. Confirm that the engine uses a carbureted fuel system and a conventional ignition method, as these details guide disassembly and inspection procedures. Document baseline measurements such as idle speed, high-speed tachometer readings, and compression values for each cylinder if applicable. Establish a safe baseline by ensuring the machine is on a stable surface, the spark plug boot is disconnected during inspection, and the fuel supply is isolated to prevent accidental engine start. This overview helps technicians quickly orient themselves to the expected architecture and common wear patterns before performing hands-on checks.

Fuel system components: The fuel system comprises the tank, primer/vent, fuel lines, carburetor, and fuel filter if present. Inspect the fuel tank for cracks, leaks, or signs of contamination such as suspicious coloration or sediment at the bottom. Check the fuel lines for brittleness, cracking, or swelling, replacing any aged or kinked sections to prevent air leaks and fuel starvation. The carburetor should be visually inspected for stuck diaphragms, gummed passages, or foreign debris that can disrupt fuel metering. If a fuel filter is installed, verify it is clean and properly seated; a clogged filter can restrict flow and lead to lean conditions or stalling. Document fuel quality, noting any ethanol blend issues or water presence, and prepare to perform a cleaning or rebuild if performance anomalies persist. Proper fuel system maintenance reduces startup difficulty and extends engine life by maintaining consistent fuel delivery.

Fuel delivery and compression inspection: Begin by confirming that fuel is reaching the carburetor by observing fuel seepage at the inlet or performing a temporary safety test with the line disconnected to verify flow. With the engine in a safe state, inspect the carburetor's float level, needle seat, and idle jet for varnish or debris; clean passages with manufacturer-approved solvents and non-metallic brushes as needed. Perform a compression test on each cylinder, recording readings and comparing them to the service specification; a low compression value can indicate worn rings, a leaking head gasket, or a damaged valve seat. If compression is outside tolerance, further diagnosis should include a wet compression test to differentiate between ring wear and valve sealing issues. Verify that ignition timing remains within factory specifications, since improper timing can masquerade as fuel delivery problems. After completing these checks, perform a controlled engine start and monitor exhaust for rich or lean exhaust characteristics, as abnormal coloration can signal metering or combustion inefficiencies.

Air intake and exhaust considerations: Inspect the air intake for obstructions, dirty air filters, or collapsed hoses that can restrict airflow and cause leaning or overheating. Replace or clean the air filter as required, ensuring the housing seals correctly to prevent unfiltered air ingress. Examine the exhaust system for blockages, excessive carbon buildup, or damaged mufflers that could affect engine backpressure and performance. Ensure cooling fins are free of debris and that the flywheel cooling pathways are unobstructed to maintain proper operating temperatures. When reassembling, verify that seals and gaskets around the carburetor, intake manifold, and exhaust interfaces are intact to prevent vacuum leaks. Proper attention to air and exhaust pathways helps sustain stable idle, reliable starting, and consistent power output across operating conditions.

Electrical system diagnosis and repair The electrical system in the CRAFTSMAN 917.370680 combines several subsystems that coordinate to start the engine, power controls, and manage safety interlocks. A careful inspection of wiring harnesses, connectors, and protective grounds is essential before attempting any diagnosis. Begin with a visual survey for corrosion, fraying insulation, or loose terminals, and verify that all protective sleeves and grommets remain in place to prevent chafing. When removing components for testing, keep track of fasteners and routing paths to ensure correct reassembly and to avoid introducing new electrical faults. Document observed conditions with notes or photos to aid in tracking recurring issues over time. Wiring diagram overview A clear understanding of the wiring harness layout helps isolate faults quickly. Locate the main power supply lines and trace them to the battery, starter solenoid, and charging system, confirming continuity with a digital multimeter. Pay close attention to the safety interlock circuits, including operators present and parking brake or blade engagement interlocks, since faults in these circuits can prevent starting or cause erratic behavior. Check for pinched wires along sharp edges or under moving components, and verify that all connectors seat fully with the correct polarity. When interpreting the diagram, note color codes and reference designators on the terminal blocks to map out branch circuits and common return paths. Battery and charging system The battery condition directly affects starter performance and electrical reliability. Begin by testing the battery voltage with the engine off, ensuring it sits within the manufacturer’s specified resting voltage range. Inspect the battery terminals for corrosion and ensure tight, clean connections; apply appropriate anti-corrosion spray or terminal grease to prevent future buildup. Evaluate the charging system by measuring voltage with the engine running and under no-load and load conditions to confirm the alternator or charging coil maintains proper output. If the system shows signs of weak charging, inspect the drive belt tension, wiring to the voltage regulator, and any fuses protecting the charging circuit. Replace any damaged cables and consider battery replacement if the current cell strength has degraded beyond 50% of its rated capacity. Ignition system checks A reliable ignition system is essential for consistent engine starting and smooth operation. Start with testing the ignition switch for proper continuity in each position and verify the ignition coil resistance against the service specifications. Inspect spark plug caps and spark plug wires for signs of wear, cracks, or arcing at high RPM; replace worn insulation and ensure proper seating to prevent misfires. If there is an ignition module, verify its ground path and shielding to minimize EMI interference with nearby sensors. When troubleshooting, isolate variables by first confirming the battery and charging system are healthy, then test the ignition components in sequence to identify the root cause of misfires or no-spark conditions. Diagnostics and troubleshooting steps A structured approach to diagnostics minimizes guesswork and equipment downtime. Start with a battery and charging test, then verify key safety interlocks and fuses are intact and correctly seated. Use a multimeter to check continuity and resistance in wiring harness segments that correspond to common failure points, recording any abnormal readings. If a fault is intermittent, inspect for loose connections and inspect for heat damage, which may indicate overcurrent conditions or poor grounding. Document findings, perform repairs with correct torque on fasteners, and re-check all affected circuits to confirm that the fault is resolved before returning the equipment to service. After repairs, perform a final functional test of starting, charging, and any dependent electrical load to verify stable operation under typical operating conditions.

Fuel system maintenance and service procedures

The fuel system is a critical component that ensures reliable starting, efficient operation, and optimal performance of the engine. Regular inspection and maintenance of the carburetor or fuel injection system help prevent flooding, lean running, and unexpected shutdowns. Begin by assessing the overall condition of all accessible fuel system components, including hoses, clamps, and fittings, looking for signs of cracking, hardening, or abrasion. When diagnosing starting or performance issues, verify that the fuel is reaching the engine at the correct pressure and that there are no air leaks in the fuel line. Document any deviations from the expected fuel delivery and plan a step-by-step procedure to restore proper function. This proactive approach reduces downtime and extends the service life of the engine’s fuel subsystem.

Carburetor or fuel injection service requires careful attention to the specific model configuration. For carbureted units, remove the carburetor and inspect the float, needle valve, and jets for wear or deposits, cleaning using an appropriate solvent and a soft brush to avoid damage. For fuel-injected systems, use manufacturer-approved cleaners and follow the service bulletin if injectors exhibit erratic spray patterns or poor atomization. After cleaning or replacement, reassemble with correct torque on fasteners and ensure gasket integrity to prevent air leaks. When diagnosing performance anomalies, consider vacuum readings and fuel pressure as critical indicators of proper metering and delivery.

Fuel filter and line inspection is essential to prevent contaminants from entering the engine. Inspect both inlet and outlet lines for cracks, brittleness, or kinks, and replace any damaged hoses with the correct diameter and rating. The fuel filter should be checked for clogging and replaced according to the service schedule or when restricted flow is observed. Dispose of old filters in accordance with environmental guidelines and priming procedures to avoid introducing air into the system. After service, prime the fuel system as required by the engine design and monitor fuel pressure during initial startup to confirm a steady, uninterrupted supply.

Fuel pump checks and replacement procedures vary by model but follow a consistent safety-oriented approach. First, disconnect battery power and relieve any residual fuel pressure before removing the pump assembly. Inspect electrical connections, wiring insulation, and the pump body for signs of corrosion or leakage. Use the proper diagnostic tools to measure fuel pressure and flow rate; compare readings to the manufacturer’s specifications and note any deviations. If replacement is necessary, ensure the new pump is compatible with the fuel type and system (carbureted or EFI) and install with proper fasteners and seals to prevent leaks. After installation, perform a full system leak test and confirm correct priming, starting, and idle stability.

Emissions control considerations are integral to maintaining legal compliance and engine efficiency. Check that all air intake components, vacuum lines, and purge systems are intact and free of leaks, as unmetered air can elevate emissions and degrade performance. Inspect the exhaust and catalytic elements for signs of clogging or damage, and replace parts that show excessive wear or sticking valves. If the engine exhibits misfires or rough running, verify that the fuel control and ignition timing are not being compromised by emissions-related faults. When performing maintenance, use only approved additives and cleaners to avoid damaging catalytic converters or sensors, and document any findings or replacements for future reference.

The starting and running adjustments for a CRAFTSMAN 917.370680 are critical for reliable operation and long engine life. Proper care begins with a clean, well-lit workspace and a stable surface to prevent movement during adjustment. Before making any adjustments, ensure the spark plug is clean and correctly gapped, the air filter is clean or replaced, and the fuel system is free of contaminants. Safety precautions include disconnecting the spark plug boot when inspecting linkage or performing adjustments to avoid accidental starting. Document any baseline readings before changing settings so you can revert if needed. Idle and speed adjustments are essential for smooth operation and optimal fuel efficiency. Start the engine and allow it to reach operating temperature, then locate the idle speed screw and the throttle linkage stop. Turn the idle screw gently to increase or decrease the engine idle RPM, monitoring the tachometer if available. The engine should idle smoothly without surging and with the cutting blades or attachments disengaged unless you intend to test load conditions. After setting the idle, verify that the engine returns to idle promptly after a throttle release and that the carburetor throttle plate closes fully without sticking. If the engine stalls at idle or runs inconsistently, recheck for vacuum leaks, dirty passages, or a misadjusted idle stop. Governor and linkage adjustments control how the engine responds to load and maintain steady speed. With the engine at no load, verify that the governor arm moves freely and that the linkage length is within the manufacturer’s specification. Adjust the throttle linkage to ensure the governor can cap maximum speed while preventing over-revving. When under load, observe the engine RPM and confirm it holds the desired speed without excessive droop or overshoot. Secure all fasteners after adjustment and recheck that the governor return spring returns the throttle to idle when the throttle is released. Regular inspection of the linkage for wear, bending, or binding helps prevent erratic behavior and abrupt throttle changes. Troubleshooting starting issues requires a systematic approach to identify fuel, air, and ignition problems. If the engine does not start, confirm the spark plug is firing by grounding it against the engine and cranking briefly, then replace if no spark is observed. Check the fuel for freshness and proper octane, ensuring the correct air-fuel mixture and absence of water or varnish in the tank. Inspect the carburetor for dirt or varnish buildup and clean or rebuild as necessary, paying attention to rich or lean idle mixture symptoms. Ensure the fuel line is not kinked and that the primer or fuel pump (if equipped) is delivering fuel effectively. If starting is intermittent, test the safety interlocks and switch wiring for faults, and verify that the recoil starter or electric start mechanism engages without excessive friction. Cold weather considerations affect starting reliability and engine performance. In low temperatures, use fresh fuel blended for winter use if recommended by the manufacturer, and consider a slight enrichment of the carburetor mixture to aid starting. Allow the engine to reach operating temperature slowly to avoid thermal shock and to promote stable idle and running. Keep the air intake free of snow, ice, or frost that could restrict airflow, and inspect the cooling system or shrouding for obstructions that could cause overheating during extended operation. Battery performance and electrical connections may degrade in cold weather, so clean and tighten terminals and ensure the starter and ignition systems operate with full voltage. Regular maintenance, including oil level checks and air filter inspection, remains essential in cold climates to prevent fouling and starting difficulties.

The cooling and air management systems of the CRAFTSMAN 917.370680 are critical for maintaining engine performance and long-term reliability. A thorough inspection should begin with a visual check for obvious damage, leaks, and secure mounting points. Ensure that all hoses, clamps, and couplings are intact and free of cracks or wear. Check the radiator for bent fins, corrosion, or blockages, and confirm that the radiator cap seats properly to maintain correct pressure. It is essential to verify that the cooling fan blades rotate freely without rubbing on the shroud and that the fan clutch, if equipped, engages and disengages smoothly. Any signs of overheating or coolant anomalies should prompt a more detailed pressure test and coolant level verification. Keep the cooling system free of debris and ensure there is adequate clearance around the radiator to promote efficient airflow, especially in dusty or debris-prone environments.

Radiator and fan service involves careful handling of cooling components to prevent damage and ensure optimal performance. Begin by draining the coolant according to the manufacturer’s specifications, then remove the radiator shroud and mounting hardware to access the core. Inspect the radiator core for bent or damaged fins, and use a soft brush or compressed air to remove any dirt or debris lodged between fins. When reinstalling, ensure the radiator is properly seated and that all connections are torqued to the specified values. The cooling fan should be tested for proper operation by running the engine and observing the fan’s engagement at the designated temperature or RPM threshold. If the fan is noisy or fails to cycle, inspect the fan motor, electrical connections, and thermostat control circuit for faults. Replace any damaged components with OEM parts and recheck for leaks after refilling the cooling system with the correct mixture of coolant and distilled water.

The air filtration system maintenance is essential to prevent particulate ingress that can cause engine wear and reduced performance. Remove and inspect the air filter element for tears, collapse, or excessive staining. A dirty or compromised filter should be replaced with the recommended OEM filter; if a reusable filter is used, clean it thoroughly according to the service instructions and allow it to dry completely before reinstalling. Check the air intake ductwork for cracks, loose clamps, or disconnections that could allow unfiltered air to bypass the filter. Ensure the intake boots and seals are intact and that the mass air flow sensor, if present, is clean and free of debris. After servicing the filter, run a brief engine test to confirm there are no abnormal air leaks or intake noises, and verify that the filter housing is securely fastened to prevent vibration during operation.

Excess heat troubleshooting requires a systematic approach to identify the source of overheating and prevent engine damage. Start with a coolant pressure test to detect leaks in hoses, radiator, or water pump seals. Monitor the temperature gauge or infrared readings while identifying any hotspots on the cylinder head, exhaust manifold, or engine block. Inspect the water pump for proper operation, including the impeller condition, bearing wear, and coolant circulation. Verify the thermostat opens at the correct temperature and that the cooling fan reacts appropriately to temperature changes. If the issue persists after basic checks, examine the heater core, intercooler (if applicable), and auxiliary cooling systems for blockages or flow restrictions. Always address overheating promptly, as prolonged excess heat can lead to reduced lubrication efficiency, gasket failures, and accelerated engine wear.

Lubrication is a fundamental maintenance task that sustains the reliability and longevity of power equipment. For the CRAFTSMAN 917.370680, establishing a regular lubrication schedule helps minimize wear on moving parts, reduces friction, and prevents early component failure. Begin by cleaning the exterior and accessible interiors to prevent dirt from entering the lubrication system during service. Ensure the engine is cool before opening any access points, and use only the recommended lubricants and oils to maintain proper engine performance and emission compliance. Keep a detailed maintenance log that records lubricant type, quantity, and service dates to track wear patterns and anticipate future service needs.

Lubrication charts provide a concise reference for needed fluids at each service interval. These charts typically specify engine oil grade, quantities for oil changes, grease points, and intervals for checking and replenishing lubricants. Before performing any maintenance, consult the chart corresponding to the model year and specific unit to confirm exact specifications. Cross-checking the lubrication chart with the component layout helps identify critical points such as crankshaft journals, camshaft lobes, pistons, and valve train pivots that require attention during routine service. Following the chart reduces the likelihood of overfilling, oil leaks, or insufficient lubrication, all of which can compromise engine performance and durability.

Oil type and capacity are foundational details for preventing sludge buildup and maintaining optimal viscosity under varying operating temperatures. Use the manufacturer-recommended oil grade, typically a diesel or gasoline spark-ignition specification, with the correct viscosity for seasonal operating conditions. Measure oil capacity accurately during changes to avoid overfilling, which can cause foaming and pressure issues, or underfilling, which leads to inadequate lubrication. Replacing oil seals and ensuring proper drain procedures help maintain the correct oil level and prevent contamination from ingress. When in doubt, refer to the service manual for the exact capacity figures and follow the recommended warm-up and drain procedures to achieve a clean, effective oil change.

Oil filter replacement is a critical step that protects the engine from abrasive contaminants. Use a filter with compatibility specifications that match the 917.370680’s engine model, ensuring proper thread size and gasket fit. Install a new filter with the correct orientation and apply a light film of clean oil to the gasket to ensure a proper seal on first start. After installation, run the engine at idle for a few minutes to circulate the new oil and confirm there are no leaks around the filter base. Recheck the oil level after the engine has cooled and settled, and top off if necessary. Document the date, filter part number, and any observations to monitor future service intervals accurately.

Bearing and seal inspection is essential to detect early signs of wear, misalignment, or lubricant leakage. Inspect all visible bearings for play, noise, or roughness during rotation, and verify that seals maintain a tight, drip-free condition. Look for signs of oil seepage around seals, gaskets, and housing interfaces, which can indicate wear or improper installation. If any bearing surfaces exhibit scoring, discoloration, or excessive movement, plan for replacement or professional reconditioning. Maintain careful torque on fasteners to avoid loosening that could jeopardize bearing alignment, and verify that lubrication paths remain unobstructed after reassembly. Regular inspection of bearings and seals helps prevent sudden failures and supports consistent engine performance over the life of the equipment.

The mower deck and transmission maintenance procedures for the CRAFTSMAN 917.370680 require careful inspection and precise alignment to ensure optimal cutting performance and reliable transmission operation. Begin with a thorough visual inspection of the deck, looking for any signs of bending, cracks, or worn mounting hardware. Confirm that all deck supports and hangers are securely fastened and that the deck is level from side to side and front to rear. If misalignment is detected, use the specified adjustment points to true the deck, noting any unusual wear patterns on the blades or spindle housings. After alignment, verify that the cutting blades are sharp, balanced, and securely fastened with the correct torque as recommended by the manufacturer. A balanced blade reduces vibration and protects spindle bearings, contributing to longer deck life and more consistent cut quality. Spindle and pulley inspection should be conducted with the blades removed for safety. Inspect each spindle housing for excessive play, damaged seals, or oil leakage, and replace any worn spindle bearings promptly to prevent further damage. Check the spindle pulleys for cracks, grooves, or missing retaining screws, and ensure that the belts run true in their grooves without any side-to-side movement. When inspecting the belts, look for signs of glazing, fraying, or missing rib teeth and replace worn belts with ones of the correct part number and width. Prior to reassembly, clean the pulleys and spindle shafts to remove any build-up of grass clippings or debris, which can cause belt misalignment or accelerated wear. After reassembly, run the mower at low speed to listen for unusual noises indicating misalignment or loose components. Drive system inspection and belt service focus on ensuring the correct tension and routing of all drive belts, as well as the integrity of the drive components. Disconnect power and engage the parking brake before beginning any inspection. Inspect the drive belts for cracks, chunking, or missing ribs along their length, and replace any compromised belt sections. Check belt tension using the manufacturer’s specified method, whether by a tension gauge or by adjusting a tensioner pulley, and ensure the tension is within the recommended range for smooth operation. Examine the belt routing to confirm it follows the correct path around pulleys and idlers, as incorrect routing can cause slip or rapid wear. Inspect the drive pulleys for wear, scoring, or corrosion, and verify that set screws are tight and the belts track properly. Regularly lubricate any accessible pivot points and check all fasteners for tightness to prevent drivetrain looseness that can affect performance. Transmission fluid and filter service requires draining, filtering, and replenishing the transmission fluid to maintain hydraulic efficiency and longevity. Start with a clean area and ensure the mower is on a level surface to obtain an accurate fluid level reading. Locate the transmission dipstick or fill port and verify the current fluid condition; drain if the oil appears milky, burnt, or has contaminants. Replace the transmission filter if the model includes one, following the specified removal and installation procedure to avoid introducing air into the system. When refilling, use the recommended viscosity and quantity of transmission fluid, and avoid overfilling which can cause foaming and transmission damage. After a complete fill, run the mower briefly and shift through all gears with the transmission under light load to circulate the fluid and check for leaks, noise, or abnormal operation. Finally, recheck the fluid level after the operation and top off if necessary, ensuring the level sits within the designated range on the dipstick or sight glass.

Safety devices and braking systems

Brake components inspection is a critical routine that ensures reliable stopping performance and operator safety. Begin by visually examining all brake-related parts for signs of wear, rust, or deformation, including brake shoes, discs, drums, cables, and linkages. Check for proper engagement and release travel, ensuring there is no excessive free play that could delay braking response. Inspect mounting hardware for tightness and integrity, and replace any worn or damaged fasteners to prevent brake system misalignment. It is essential to test brake operation with the engine off and the transmission in a safe gear, confirming the vehicle remains stationary when the brake is applied firmly. Document findings and schedule replacements according to manufacturer recommendations or observed wear to maintain effective braking performance.

Safety interlocks and kill switch checks are designed to prevent operation in unsafe conditions and to ensure the machine cannot start inadvertently. Verify that the ignition key or start button engages only when safety interlocks are properly seated and all protective guards are in place. Test the kill switch by attempting to start the engine with the safety key removed or with a guard open; the engine should stop immediately if the interlock is functioning correctly. Inspect all wiring harnesses connected to the safety interlocks for fraying, corrosion, or loose connections, and repair any compromised wiring with manufacturer-approved components. Conduct periodic functional tests, especially after maintenance or component replacement, to confirm the interlocks reliably prevent operation under unsafe circumstances.

Steering and control linkages require careful inspection to maintain responsive and predictable handling. Examine steering components for looseness, excessive play, or bent parts that could affect control accuracy. Check the tie rods, rods ends, pivots, and bushings for wear and lubrication status, applying the manufacturer’s recommended lubricant type and intervals. Ensure that control linkages move smoothly without binding or sticking and that protective boots or dust shields are intact to prevent contamination. In addition, verify that steering alignment remains within factory specifications, and adjust toe-in or castor angles as needed using proper alignment tools. Conduct a functional test at low speed to confirm precise and stable steering input before returning to normal operation.

Hazard prevention and routine checks encompass a broad, proactive approach to ensure ongoing safety in operation and maintenance. Establish a routine that includes inspecting all safety devices for signs of tampering or damage before each use, including operator presence sensors, seat switches, and blade or attachment guards. Clean away debris that can obscure safety labels or interfere with moving parts, and replace any damaged labels to preserve proper warnings. Create a log of routine checks, noting the date, condition, and corrective actions taken to maintain a traceable history. Perform solvent-free cleaning around hot surfaces and moving parts to avoid fire hazards, and promptly address any unusual heat, noise, or vibration that could indicate a developing fault. By integrating thorough hazard prevention into regular maintenance, operators can minimize risk and extend the lifespan of safety-critical systems.

Disassembly and reassembly procedures

When preparing to begin disassembly, ensure you have a clean, well-lit workspace with ample room for organizing fasteners and small components. Disconnect power sources and remove any fuel or oil residues to prevent accidental ignition or spills. Document each step with photos or notes to aid correct reassembly, and label connectors, wires, and subassemblies to preserve original routing. Use the proper tools for each fastener to avoid rounding edges or damaging surrounding components. Work gradually, keeping track of the order in which parts are removed so that reassembly is straightforward and accurate.

Before removing any major assembly, inspect the device for safety features and locking mechanisms that may require specific procedures or tools. Identify critical fasteners that secure structural components, as improper removal can compromise alignment or function. Keep an organized tray of screws by size and length, and avoid mixing fasteners from different areas of the machine. When removing components, take care not to bend or deform thin sheet metal or delicate plastic housings. If a part seems stubborn, apply penetrating oil sparingly and allow it to work before reattempting to avoid stripping threads.

During disassembly, reference torque specifications for each fastener and avoid exceeding recommended values during reassembly. Record torque settings for future maintenance and ensure you have calibrated torque wrenches suitable for the range required. When removing drive belts, pulleys, or gears, observe the correct tensioning method and verify that alignment marks are preserved or accurately restored on reassembly. For electrical components, disconnect the battery or power source first, then label connectors and take care to prevent conductor damage or short circuits. Always replace worn seals and gaskets with OEM or equivalent parts to maintain system integrity upon reassembly.

Component reassembly should follow the reverse order of disassembly, ensuring that all fasteners engage clean threads and reach the specified torque. Recheck belt tensions, alignment, and gearbox or pulley positions after replacing subassemblies to ensure smooth operation. Validate electrical connections with a continuity test where applicable and confirm that switches and safety interlocks operate correctly before applying power. As you reassemble, confirm that hoses, clamps, and vent paths are properly routed and secured to prevent leaks or interference with moving parts. Finally, perform a cautious initial start-up test in a controlled environment to observe for unusual noises, vibrations, or overheating, and address any anomalies before normal service use.

In the context of repairability and part replacement, assess whether a worn or damaged component can be serviced or must be replaced entirely. Document part numbers and keep a replacement parts list for future reference. When feasible, perform preventative replacements of wear items such as seals, filters, and gaskets to extend service life and reduce downtime. Store removed components in labeled containers or bags to facilitate return-to-service if needed for warranty or troubleshooting. Maintain a clean condition in the work area throughout the process to minimize contamination and ensure that reassembled units meet original performance specifications.

Adhere to manufacturer recommendations for lubrication and cleanliness during both disassembly and reassembly. Use appropriate lubricants as specified for bearings, gears, and moving linkages, and ensure that lubricant residues are wiped away from surfaces that should remain clean. Follow proper handling procedures for all specialty tools and jigs to avoid distortion or damage to critical contact surfaces. Keep records of disassembly dates, parts replaced, torque values, and any deviations from standard procedures to support traceability and future maintenance planning. By maintaining meticulous attention to detail, you can achieve reliable performance and extend the life of your equipment.

Notes regarding safety and compliance should be observed at all times, including the use of personal protective equipment and adherence to environmental regulations for fuel and oil containment. Dispose of any contaminated fluids in accordance with local regulations and never dispose of hazardous materials in regular trash streams. When in doubt about a step or torque specification, consult the OEM service manual or authorized service technician resources to ensure you do not compromise the integrity or safety of the machine. This disciplined approach to disassembly and reassembly will help deliver predictable outcomes and maintain the reliability of your outdoor power equipment.

Common fault codes and symptoms: When diagnostics begin, document any fault codes displayed by the system or error indicators on the control panel. Note that many codes correspond to specific sensor failures, ignition issues, or transmission faults, and you should corroborate them with symptom descriptions such as no start, misfire, excessive vibration, or loss of power. Typical mechanical symptoms include abnormal noises, smoking, oily or fuel-rich exhaust, and unusual smells. It is essential to verify user-reported symptoms with a physical inspection of air filters, spark plug condition, fuel lines, and cooling fins, as neglect in these areas often mimics more serious electronic faults. Record the exact conditions under which the fault occurs, such as engine temperature, load, and ambient conditions, to differentiate intermittent faults from persistent ones. This detailed correlation between codes and symptoms guides the subsequent diagnostic path and helps avoid unnecessary repairs.

Electrical and mechanical diagnostic flowcharts: Begin with a power and safety check to ensure the unit is de-energized and properly grounded before any testing. Follow a logical sequence that starts with the most accessible subsystems, such as battery health, wiring continuity, and fuse status, then progresses to sensors, actuators, and control modules. For mechanical subsystems, inspect the engine, clutch, belts, and drive components for wear, misalignment, or binding that could present as electrical faults due to abnormal load or vibration. Use a systematic approach to isolate fault domains: electrical symptoms usually originate from harness or module issues, while mechanical symptoms often involve moving parts or mounting hardware. Document all measurements precisely and compare them with factory tolerances to identify variances that signify a fault condition. Cross-check findings with service bulletins or updates from the manufacturer to ensure alignment with the most current maintenance recommendations.

Testing procedures and instruments: Utilize calibrated diagnostic tools appropriate for the model, including multimeters, oscilloscope, and compression testers where applicable. Perform a step-by-step resistance and continuity test on critical circuits, ensuring connector pins are clean and securely seated to prevent spurious readings. For ignition and fuel systems, employ a spark tester and fuel pressure gauge to confirm proper operation within specified ranges; any deviation can indicate fuel delivery issues or ignition timing problems. Use a manual run test under controlled conditions to observe operational behavior, logging RPM, temperature, and load data. Always document test results with timestamps and reference values, and perform retests after any corrective action to confirm restoration of normal operation.

When to replace components rather than repair: Certain repair decisions hinge on the cost, reliability, and anticipated service life of the component. If a wear item such as belts, bearings, or seals exhibits measurable deterioration beyond specified limits, replacement is generally preferred to avoid recurring faults. Electrical modules that exhibit intermittent failures, corrosion, or burn marks typically require replacement rather than repair, as repairs may not restore full reliability and can introduce new failure modes. Consider the availability of replacement parts and the expected downtime when deciding to replace versus repair; a failed, obsolete, or hard-to-source component often makes replacement the more practical choice. Finally, if a repair would compromise safety-critical functions such as brake systems or emergency shutoffs, replacement with OEM parts is the safest and most responsible course of action.

CRAFTSMAN 917.370680 Service Manual

Maintenance checklist and intervals

Daily maintenance checklist Performing routine daily checks helps ensure reliable operation and extends the life of the equipment. Begin by inspecting the air filter for dirt and debris; a clogged filter reduces engine efficiency and can cause overheating. Clean or replace the filter as needed and verify that the air intake is unobstructed. Check the engine oil level with the machine on a level surface, adding oil if it is below the recommended mark, and inspect for contamination or unusual viscosity. Examine the spark plug for signs of wear, fouling, or corrosion; clean or replace it if necessary and ensure the gap matches manufacturer specifications. Finally, inspect the belts and blades for wear, cracks, or damage, and remove any grass clippings or debris buildup around the underside of the deck to promote proper cooling and mowing performance. Weekly maintenance tasks On a weekly basis, perform a more thorough inspection of drive belts, pulleys, and tensioners to ensure proper operation and to prevent slippage. Check the battery (if applicable) for clean terminals and secure connections, and recharge or replace the battery as needed to maintain reliable starting and performance. Inspect fluid levels beyond engine oil, such as hydraulic or transmission fluids if the unit uses them, and top off according to the service manual. Lubricate recommended pivot points, linkages, and moving parts with a light oil or specified lubricant to minimize wear and ensure smooth operation. Examine the deck and spindle assemblies for any signs of bending or damage, and tighten all fasteners that may have loosened during operation. Perform a visual check for fuel leaks, hose wear, and loose clamps, addressing issues promptly to prevent costly failures. Seasonal and annual service plan Seasonal maintenance focuses on ensuring peak performance throughout peak usage periods and protecting the engine from prolonged idle or storage conditions. Replace the spark plug and air filter as part of a routine annual service to maintain optimal combustion and airflow. Change engine oil and replace the oil filter (if equipped) according to the manufacturer's recommended intervals, typically after the first 5 hours of operation for new units and then at regular intervals thereafter. Inspect and service the fuel system, including cleaning or replacing the fuel filter and inspecting fuel lines for cracks or leaks. Check the cooling system, including the cooling fins and shrouds, removing debris to prevent overheating. If the unit has a carburetor, consider a thorough cleaning or rebuild by a qualified technician, especially if performance has degraded or there are signs of fuel-related varnish buildup. Prepare the unit for storage by cleaning thoroughly, stabilizing fuel if long-term storage is anticipated, and performing a full diagnostic check before putting the machine away for the off-season. Record keeping and parts inventory Maintain a detailed log of all maintenance activities, including dates, performed tasks, parts replaced, and any observed anomalies. Use the log to establish a reliable maintenance cadence and to anticipate part replacements before a failure occurs. Keep an organized inventory of commonly needed parts such as air filters, spark plugs, belts, blades, and lubricants, labeling each item with part numbers and purchase dates. Couple the records with a parts list that is verified against the unit’s serial number and model to ensure compatibility when ordering replacements. Implement a routine for periodic calibration of safety systems and measuring devices, recording results to confirm they meet specification. Regularly audit the inventory to prevent overstocking or stockouts, and establish automated reminders for upcoming maintenance milestones to support consistent upkeep and downtime planning.

The loss of power and acceleration issues in outdoor power equipment can stem from several sources, including a restricted air intake, a clogged fuel filter, or a dirty carburetor. Begin by inspecting the air filter for debris and replace it if it shows signs of wear or excessive buildup. A clean air path ensures the engine can breathe properly and develop full power. Next, check the fuel system for stale or contaminated fuel, and replace the fuel filter if necessary. If the carburetor is suspected, carefully inspect the jets and float level, and clean or rebuild the carburetor following the manufacturer’s specifications. After performing these checks, test the throttle response at partial and full throttle to ensure smooth acceleration without hesitation or lag. Persistent power loss may indicate a more serious issue such as compression loss or a failing ignition system, which should be diagnosed with appropriate testing procedures and professional service if needed.

Unusual noises and vibrations often point to mechanical issues that require careful inspection. Start by listening for the source of the noise, such as the cutting deck, blade, or drive components. Loose or damaged blades can cause noticeable vibration and cut quality problems, so remove the spark plug cap and rotate the blade by hand to check for wobble or runout; replace bent or unbalanced blades and ensure the blade is properly torqued to specification. Inspect spindle housings and bearings for wear, and replace any worn components to restore smooth operation. The drive belt, pulleys, and clutches should be checked for cracks, fraying, or misalignment, as these can contribute to abnormal sounds and reduced performance. Finally, ensure the engine mounts are secure and that there are no foreign objects lodged in the deck area that could cause interference or vibration during operation.

Starting or stalling problems are frequently related to fuel, ignition, or safety interlock systems. Begin with fresh fuel and a clean filter, as old or contaminated gasoline can cause hard starts and stalling. Check the spark plug for proper gap, fouling, or wear, and replace it if necessary. Verify that the choke and throttle/linkage operate smoothly, with no binding that could cause the engine to stall during startup. If the equipment is equipped with safety switches or neutral/operate interlocks, confirm that they engage correctly when the control levers are in the intended positions. A transmission or clutch issue can also cause stalling on models with drive systems, so inspect these components for wear and proper engagement. If the machine still experiences starting difficulties after these checks, consult the service manual for timing settings or further diagnostic steps specific to the model.

Poor cutting performance and uneven blade wear are typically the result of improper blade maintenance or deck condition. Begin by inspecting the blade for nicks, dull edges, or excessive wear, and rotate or replace blades as required to maintain true cutting. Ensure that the blade is balanced and installed with the correct orientation and color-coding if applicable. Deck cleanliness is essential; remove grass clippings, built-up residue, and debris from the under-deck area to prevent clogging and heat buildup. Check the blade gap and the serration (if equipped) to ensure it matches the manufacturer's specifications, and inspect the spindle and gearbox for proper lubrication and wear. Uneven cut quality can also be caused by worn or misaligned wheels or rollers, so verify alignment and adjust as needed. Regular maintenance, including sharpening, balancing, and timely replacement of worn components, will preserve cutting performance and extend the life of the mower deck.

When maintaining and repairing outdoor power equipment, sourcing authentic OEM parts is essential for ensuring fit, performance, and safety. Begin by identifying the exact model number and serial number of the unit, as replacement parts often vary between production runs. OEM parts are typically available through the manufacturer’s official parts distributor or authorized service centers. If you cannot locate parts directly from the manufacturer, reputable third-party suppliers that clearly list OEM compatibility can be a viable option, provided they offer genuine or equivalent specifications. Always verify part numbers against the service manual's exploded views to prevent ordering errors that could lead to improper fit or compromised operation. Maintain a record of part numbers and purchase dates for future maintenance and warranty considerations.

Cross reference and compatibility are critical to avoid mismatches that can affect engine performance, safety, and warranty coverage. Use the exact cross-reference diagrams provided in the service documentation to confirm compatibility with your specific engine family and drive system. When substituting parts, ensure the replacement has identical dimensions, thread types, and material specifications. Pay attention to core components such as conduits, fasteners, and gaskets, as even small deviations can impact sealing, alignment, and lubrication pathways. If there is any doubt, contact the manufacturer’s technical support or an authorized service technician to confirm compatibility before installation. Document any substitutions for future service references.

Seal, gasket, and bearing identification requires careful inspection and characterization, as these components control leakage, pressure containment, and rotational clearance. Inspect seals for cracking, hardening, flattening, or boot distortion and replace them if any defect is found. Gaskets should lie flat with uniform compressibility; replace if there is deformation or lifting around bolt patterns. Bearings must rotate smoothly without roughness or play; measure shaft runout and verify bearing bore size against the OEM specification. When in doubt, replace seals, gaskets, and bearings as a set to ensure uniform sealing and reduced risk of misalignment. Proper lubrication of bearings and seals during reassembly is essential to prevent premature wear and overheating.

Recommended tools and torque specs are foundational to achieving reliable service results and preserving warranty coverage. Maintain a calibrated torque wrench and the manufacturer’s recommended torque values for fasteners of varying sizes, as overtightening can strip threads and under-tightening can permit loosening during operation. Use the correct screwdriver bits and socket sizes to avoid cam-out and tool slip that could damage fasteners or components. Keep a clean workspace with organized bins for fasteners and an accessible torque chart for quick reference during reassembly. Follow the service manual's torque sequences in the correct order to ensure even pressure distribution across gaskets and mating surfaces, which helps prevent leaks and distortion. Meticulous torque adherence combined with verified part compatibility will yield a durable repair and restore peak equipment performance.

The CRAFTSMAN 917.370680 is covered under specific warranty terms designed to protect the owner against manufacturing defects and certain service issues encountered during normal use. Warranty coverage typically applies to the original purchaser and is contingent upon proper use, maintenance, and adherence to the recommended operator guidelines. To ensure eligibility, retain proof of purchase and follow the prescribed service intervals and maintenance procedures outlined by the manufacturer. It is important to understand that cosmetic damage, misuse, improper maintenance, and unauthorized repairs can void the warranty, even if other conditions are met. Review the exact wording of the warranty document that accompanies the product for comprehensive coverage details and any regional limitations that may apply.

Service limits for the 917.370680 are defined to help prevent unnecessary repairs and to guide owners toward appropriate remedies. The warranty typically covers defects in materials and workmanship for a specified period from the date of purchase, with certain parts indicated as wear items that may have limited or no coverage due to normal wear. Maintenance performed by non-authorized technicians or the use of non-approved replacement parts can also affect the warranty status. In addition, scenarios such as accidental damage, improper storage, or exposure to extreme environmental conditions may fall outside the warranty scope. It is essential to perform regular maintenance, including air filter inspection, fuel system checks, and blade or tine inspections as recommended, to preserve warranty integrity.

Authorized service centers are designated to handle warranty claims and complex repairs under the terms of the coverage. These centers have access to genuine manufacturer parts, up-to-date service bulletins, and technical guidance to ensure repairs meet specification. When seeking service under warranty, contact the manufacturer or your local authorized dealer to verify coverage, schedule service, and arrange for part replacement if needed. Keeping documentation of service visits, part replacements, and maintenance records at these centers helps establish eligibility and expedites claim processing. If you relocate or travel, you can often locate an authorized center via the manufacturer’s official website or customer support line, ensuring continuity of warranty service regardless of location.

Documentation required for warranty claims typically includes proof of purchase, model and serial numbers, and a clear description of the defect or failure. Owners may be asked to provide photographs or diagnostic information to support the claim before authorization for service is granted. It is also common to require that the product have undergone routine maintenance in accordance with the owner’s manual before a warranty claim is approved. Keep copies of all communications with service centers and the warranty administrator, as well as any repair invoices that may be needed for future reference. By organizing these documents ahead of time, owners can streamline the warranty process and reduce downtime.

The illustrated parts diagrams associated with the CRAFTSMAN 917.370680 provide a visual map of each assembly and subassembly within the unit. When approaching maintenance or repair, begin by locating the corresponding diagram for the suspected faulty area, such as the engine assembly, drive system, or deck components. Use the diagram to identify part numbers, relationships, and fastener locations, which helps prevent accidental misassembly. Keep the diagrams clean and accessible during work, marking any removed components with notes or temporary labels to avoid mismatches during reassembly. For complex repairs, cross-reference multiple diagrams to confirm the correct part orientation, especially for items that rely on precise alignment.

The glossary of terms provides quick definitions for common components and technical language encountered in the service manual. Familiarize yourself with terms such as camshaft, crankcase, flywheel, recoil starter, and carburetor to ensure accurate communication during diagnosis and repair. Understanding torque, clearance, and lubrication terminology is essential for achieving reliable results. When entering service notes, use standardized terms to maintain consistency across documentation and future service history. This section serves as a quick reference to avoid ambiguity during troubleshooting and disassembly tasks.

The torque specifications reference consolidates required values for fasteners across the 917.370680 model. Start by verifying the fastener size and grade before applying torque, then use the correct torque sequence to prevent distortion of mating surfaces. Record measured torques during reassembly to establish a maintenance baseline and facilitate future diagnostics. When adjusting components such as blade adapters, wheel hubs, or engine mounting bolts, ensure fasteners are tightened within the recommended range and in the prescribed pattern. For critical joints, consider using a calibrated torque wrench and a clean, dry thread surface to achieve repeatable results each time you service the equipment.

The maintenance diary and upgrade notes offer a structured way to track service events, parts changes, and potential improvements over time. Maintain entries for routine servicing intervals, replacement of wear-prone components, and any observed performance changes. Document the date, hours of operation, symptoms, actions taken, parts used, and the outcome to build a comprehensive service history. When planning upgrades, use the notes to compare compatibility, efficiency gains, and potential warranty implications. Regularly reviewing the diary helps identify recurring issues and informs preventative maintenance strategies for the CRAFTSMAN 917.370680.