CRAFTSMAN 917.273100 Service Manual

The CRAFTSMAN 917.273100 Service Manual provides comprehensive guidance to help technicians diagnose, maintain, and repair this outdoor power equipment unit. This section outlines the essential purpose of the manual, ensuring technicians understand the scope and limitations of the repair procedures, required tools, and documented procedures for safe and effective service. It establishes a clear framework for diagnosing issues, verifying proper functionality, and restoring the equipment to operating condition in a systematic and repeatable manner. The information here is intended to support both routine maintenance and more complex repairs, promoting consistent workmanship and reliable performance after service.

Safety warnings and symbols are presented to alert technicians to potential hazards associated with operating, servicing, and repairing outdoor power equipment. Proper interpretation of each warning, caution, and informational symbol is critical to prevent injury to the technician and damage to the machine. Adhering to these warnings, including following lockout/tagout procedures and de-energizing components before work, reduces the risk of unexpected startup, sharp blade contact, hot surfaces, and electrical shock. The manual emphasizes that safety data sheets, manufacturer guidelines, and local regulations should be consulted when handling fuels, solvents, and lubricants, and that any damaged components should be replaced rather than repaired where appropriate.

Personal protective equipment (PPE) requirements are specified to protect technicians during inspection, maintenance, and repair tasks. This includes the use of eye protection, hearing protection, gloves, and appropriate clothing to resist punctures, cuts, and chemical exposure. The manual also notes that PPE choices may vary depending on the task, such as using cut-resistant gloves when handling blades or rotating parts and employing respirators if grinding or sanding generates fine particulates. It is essential to inspect PPE for wear and proper fit before each service procedure and to replace damaged gear promptly to ensure ongoing protection throughout the repair process.

General safety guidelines for outdoor power equipment cover a broad range of everyday operating considerations, including stable work surfaces, secure chassis, and proper tool organization. The manual advises technicians to disconnect power sources and remove the spark plug wire or battery before performing maintenance to prevent accidental startup. It also highlights the importance of maintaining proper ventilation when running engines indoors or in enclosed spaces and managing fuel carefully to avoid spills and fire hazards. Adherence to proper lifting techniques, securing the equipment during service, and keeping work areas free of clutter are underscored as fundamental practices to minimize injury and equipment damage during maintenance and repair tasks.

The CRAFTSMAN 917.273100 series requires accurate identification of model, serial numbers, and key specifications to ensure proper maintenance and repair. Begin by locating the model plate on the mower, which is typically found on the chassis near the engine compartment or under the seat area. The model number 917.273100, along with the serial number, uniquely identifies the production run and any design revisions. Record these identifiers precisely, as they guide parts compatibility, service bulletins, and torque specifications. When recording, note the production date if available, as it helps determine applicable lubrication intervals and replacement component availability. A clear, legible record of these numbers reduces misidentification and speeds up service workflows. Engine and electrical specifications are foundational for diagnosing performance issues and selecting the correct replacement parts. The engine type in this series is commonly a vertical shaft gas engine with a specified displacement and horsepower rating. Verify spark plug type, gap, and ignition timing as part of routine maintenance and preventative checks. Electrical specifications include charging system voltage, alternator output, and wiring color codes for the harness. Inspect the battery type, cold-cranking amps, and electrolyte level if the machine uses a removable battery pack. Understanding these specifications ensures safe operation, correct starting procedures, and accurate troubleshooting of electrical faults such as no-start or intermittent stalling. Belt and blade data are critical for proper cutting performance and belt longevity. Identify the correct drive belts, deck belts, and their routing paths according to the engine model and mower deck size. Check belt tension signs and wear indicators, replacing belts that show cracking, fraying, or glazing. For the cutting blades, confirm the blade length, number of teeth, and mounting configuration; ensure the blades are balanced and installed with the correct orientation. Review the blade level and mower deck height adjustments to achieve uniform cut quality. Regular inspection of belts and blades safeguards deck efficiency, reduces vibration, and extends component life. Lubrication and fluid capacities cover essential maintenance intervals for longevity and reliability. Determine the lubrication type, including engine oil specification, capacity, and service interval, as well as any grease points on the deck and transmission if equipped. Record fluid capacities for crankcase oil, fuel type, and any hydraulic reservoirs, ensuring compliance with the manufacturer’s recommendations. Follow strict procedures for changing oil and replacing oil filters, using the proper funnel and drainage container to prevent spills. For manual lubrication points, apply the recommended grease or oil sparingly and wipe away excess to minimize dirt accumulation. Adhere to the recommended maintenance schedule, including after-use inspections, to maintain peak performance and prevent unexpected downtime.

Initial inspection and preparation starts with a careful assessment of the unit as it arrives from storage or shipment. Begin by verifying that the package contents match the bill of materials, including the mower deck, operator’s manual, safety decals, and any optional accessories listed on the order. Inspect the exterior for signs of damage such as dents, crushed corners, or loose components, and record any discrepancies for warranty or service purposes. Remove all packaging materials and ensure that components are free from transit debris before proceeding with any disassembly or inspection. A clean, well-lit workspace is essential to identify fasteners, wiring connectors, and small parts that could be overlooked in a cluttered area. Note the model number and serial number on the machine label for reference during parts lookup and service documentation. Storage and handling considerations are critical to maintaining the integrity of sensitive components. Store the machine in a dry, level area away from direct heat sources, chemicals, and moisture until it is ready for servicing. If the unit has been exposed to humidity, allow time for any condensation to evaporate and inspect electrical connectors for corrosion before reconnecting power. When moving the mower, use proper lifting techniques to protect the cutting deck and undercarriage; employ a dolly or lifting strap if the unit is heavy, and avoid dragging the machine across rough surfaces. Keep all fluids at proper levels and ensure the fuel system is isolated if the unit will be stored for an extended period. Secure loose parts and cap exposed lines to prevent contamination during handling and transport. Pre operation inspection and conditions should be conducted with safety as the top priority. Before engaging any starting procedure, perform a visual scan for loose fasteners, damaged wires, or missing safety devices such as blade brakes and shields. Check the battery state of charge, terminal cleanliness, and the absence of corrosion, and ensure that the connections are secure. Inspect the fuel system for leaks, verify the fuel type matches the manufacturer specification, and examine cooling fins and air intake paths for obstructions. Confirm that the blade disc is properly seated and free of cracks, and verify that the deck belt tension is within specification. If you detect any abnormal noises, vibrations, or overheating during a preliminary run, cease operation and perform a more thorough diagnostic before attempting extended use. Tools required for service should be assembled in a clean, organized manner to expedite maintenance tasks and reduce the risk of damage. A standard metric and SAE tool set, a torque wrench, feeler gauges, and a multimeter are often necessary for routine adjustments and electrical checks. Include bottle jacks or stands for safe component elevation during belt or deck servicing, along with a set of pliers, screwdrivers, and a rubber mallet for careful component alignment. Have a clean set of rags, contact cleaner, and appropriate lubricants readily available for reducing friction points and ensuring smooth movement of pivot points. Always follow the manufacturer’s torque specs and lubrication intervals to sustain optimal performance and avoid over-tightening or under-lubrication, which can lead to premature wear. Maintain a dedicated parts tray with labeled compartments to keep fasteners organized according to their original mounting locations, minimizing the risk of misplacement during reassembly.

Maintenance schedule and intervals

Routine maintenance tasks should be performed on a consistent basis to maintain the reliability and performance of the CRAFTSMAN 917.273100. Begin with a thorough exterior inspection to identify any signs of wear, corrosion, or loose fasteners, and document findings for future reference. Periodically check the air intake, filters, and cooling passages to ensure unobstructed airflow and efficient engine operation. Inspect the drive belt(s), pulleys, and cutting deck components for wear or damage, replacing any parts that show significant wear or cracking. Regular lubrication of pivot points, linkages, and any exposed bearings helps prevent premature wear and ensures smooth, precise operation. Keep a clean workspace during maintenance to avoid introducing dirt into critical systems, and always follow manufacturer torque specifications when reassembling components.

Preventive maintenance timing should be planned around the equipment’s typical usage patterns and the environment in which it operates. For seasonal equipment, schedule a comprehensive service at the end of the operating season, including spark plug replacement, fuel system inspection, carburetor cleaning, and a full lubrication of all moving parts. If the machine is used in dusty or debris-heavy environments, increase the frequency of air and fuel filter checks and perform deeper cleans more often to prevent performance degradation. For continuous or commercial use, implement a monthly inspection cycle that covers safety systems, belt tension, blade integrity, and lubricant levels, ensuring that no component runs past its recommended service interval. Align maintenance tasks with the equipment’s hour meter readings when available, and maintain a log to track performed services and repeat intervals. This proactive approach minimizes the risk of unexpected downtime and extends the service life of critical components.

Record keeping and reminders are essential to sustain an effective maintenance program. Create a simple log that records the date, hours of operation, tasks completed, parts replaced, and any anomalies observed during service. Use calendar reminders or a maintenance app to alert you when upcoming tasks are due, especially for items with strict service windows such as spark plugs, air filters, and fuel system components. Keep all receipts and part numbers associated with maintenance for future reference and warranty validation. Periodically review the maintenance history to identify patterns, such as recurring filter fouling or fastener loosening, and adjust intervals accordingly. A well-maintained record system not only supports reliability but also provides a clear trail for service technicians if professional inspection or repairs are ever required.

Engine service and tuning for a CRAFTSMAN 917.273100 requires careful attention to the air, fuel, and ignition systems to restore reliable performance. Begin with a thorough air filter inspection, verifying that the filter element is clean, intact, and free of oil saturation or debris. A clogged or damaged air filter restricts airflow, causing rich mixtures, reduced power, and increased fuel consumption. Replace the filter if it shows signs of wear, tears, or excessive dirt buildup, and ensure the housing seals properly to prevent unfiltered air from bypassing the filter. When reinstalling, confirm that all clamps and gaskets are secure so the intake pathway remains airtight. Regular inspection at intervals aligned with operating hours will maintain consistent engine performance and longevity.

Understanding the fuel system is essential for dependable starting and smooth running. Check the fuel lines for any signs of cracking, stiffness, or leaks, and replace them if deterioration is evident. Ensure the fuel tank is clean and free of sediment, and inspect the venting to prevent vapor lock or fuel starvation. If ethanol-blended fuels are used, consider additives or stabilizers to reduce phase separation and mucking of the carburetor. Always use fresh, clean gasoline within the recommended octane rating, and avoid storing fuel in the tank for extended periods to minimize varnish formation in the fuel system.

Carburetor adjustments and rebuilding demand meticulous attention to baseline settings and proper cleaning. Before making adjustments, record current idle speed, mixture, and linkage positions to serve as a reference. Disassemble the carburetor only after ensuring the engine is cool and the fuel supply is disconnected. Use appropriate carburetor cleaners and brushes to remove varnish and gum without damaging metering components. When rebuilding, replace gaskets, seals, and any worn diaphragms, and verify that the float height and needle seating are correct for stable idle and throttle response. Reassemble with the linkage and throttling screws coordinated to achieve smooth, responsive acceleration and consistent idle rpm across environmental conditions.

Spark plug inspection and gap setting directly influence ignition performance and fuel efficiency. Remove the spark plug and examine the electrode condition, looking for excessive fouling, wear, or oil contamination that could indicate engine issues. If deposits are present, clean the plug or replace it with the correct heat range recommended by the manufacturer. Use a feeler gauge to verify the prescribed gap, and adjust carefully to the specified dimension. After installation, torque the spark plug to the manufacturer’s specification to ensure a reliable seal and prevent arcing. A properly gapped and clean plug improves starting, throttle response, and overall engine efficiency during operation.

Cooling system checks are essential to prevent overheating and maintain stable performance under load. Inspect the cooling fins and guards for obstructions such as grass clippings, dirt, or debris, and remove any buildup with a soft brush or compressed air from a safe distance. Ensure the cooling fins are intact and not bent, which could impede airflow and heat dissipation. Verify that the cooling fan operates freely without rubbing, and listen for unusual noises that could indicate bearing wear or misalignment. Check the engine shroud seals to guarantee adequate air intake through the intended paths, and replace any damaged seals to protect against ingress of dust and debris that can accelerate wear and reduce efficiency.

In practice, combining these checks into a regular maintenance routine yields consistent performance and extends the life of the engine. Document service intervals, parts replaced, and observed operating conditions to guide future maintenance decisions. When in doubt, consult the manufacturer’s specifications for tolerances and procedure steps, and use OEM parts to preserve engine reliability. A methodical approach to air, fuel, ignition, and cooling systems ensures the engine remains dependable across a variety of operating environments and workload demands.

The performance and longevity of your CRAFTSMAN 917.273100 are heavily influenced by how you manage fuel quality and storage. Start with using fresh gasoline that meets the engine manufacturer’s octane and volatility specifications; older fuel can degrade and cause starting difficulties, rough running, or increased emissions. Always store fuel in approved containers, away from direct sunlight and heat sources, and label containers clearly to avoid misfueling or cross-contamination with non-fuel liquids. Stabilizers can extend storage life, especially if fuel will be unused for extended periods; add stabilizer according to the product instructions, and run the engine for several minutes after adding stabilizer to ensure the treated fuel circulates through the entire fuel system. Regularly inspect the fuel and venting system for signs of deterioration, such as cracked hoses or loose clamps, and replace components as needed to maintain optimal performance and safety.

Emission control components are critical for reducing pollutants and maintaining efficient operation. Ensure that the air intake system remains free of obstructions, including debris and foliage that can restrict airflow and cause the engine to run rich or lean. Periodically inspect the exhaust system and muffler for signs of damage or corrosion, and replace any compromised parts to prevent exhaust leaks and ensure proper catalytic or emission control function, if equipped. When performing maintenance, disconnect the spark plug boot to prevent accidental starting and follow safe procedures to avoid burns or fires. Use manufacturer-recommended consumables and follow torque specifications for fasteners to preserve the integrity of emission-related components and maintain compliance with applicable standards.

Troubleshooting fuel related issues requires a systematic approach to identify the root cause without introducing new problems. Begin by checking for simple causes such as a clogged fuel filter, stale fuel, or a blocked carburetor jet, and service these parts using the correct tools and procedures outlined in the service manual. If starting or running issues persist, inspect for air leaks in the intake manifold or fuel line connections, as vacuum leaks can mimic fuel problems and lead to incorrect air-fuel ratios. When diagnosing, verify fuel pressure within the system if your model provides a serviceable fuel pressure port, and compare readings to the manufacturer’s specifications. Document all findings and corrections, and reset any fault indicators or safety interlocks after repairs to ensure the engine returns to proper operation and complies with emissions expectations.

Electrical system diagnostics and repair require careful, methodical steps to ensure safe operation and accurate identification of faults. Begin with a thorough visual inspection of all accessible electrical components, looking for damaged wires, frayed insulation, corrosion at terminals, melted connectors, and signs of moisture ingress. Use a multimeter to verify reference voltages and continuity across harnesses, connectors, and grounds. Document any anomalies with clear notes and, when possible, take reference measurements before and after repairs to confirm that the fault has been resolved. Always disconnect the battery before performing invasive checks on high-current circuits to prevent arcing and injury. Maintain clean, dry work conditions and use insulated tools to reduce the risk of short circuits during testing.

Battery inspection and charging procedures require verifying battery health, voltage, and electrolyte condition if applicable. Start by removing the battery and inspecting the terminals for corrosion; clean with a non-abrasive brush and a mild solution of baking soda and water if corrosion is present, ensuring all connections are dry before reinstallation. Check the battery’s open-circuit voltage with a digital voltmeter, and compare it to the manufacturer’s specifications for your model; a reading significantly below the expected range may indicate a sulfated cell or a failing battery. Inspect the charging system by measuring the charging voltage at the battery terminals with the engine running at both idle and higher RPM; ensure the system maintains a stable voltage within the specified range without excessive ripple. If charging is insufficient, trace the circuit back to the alternator or stator, fuses, and the battery regulator, verifying continuity and inspecting for damaged connectors or loose grounds that could impede charging performance.

Solenoid and wiring harness tests focus on verifying that control signals properly activate the starter and that the path for current flow is intact. Test the solenoid coil resistance against the manufacturer’s spec using a precise ohmmeter, and inspect the plunger operation for sticking or excessive wear. When the starter relay or solenoid does not engage, examine the associated wiring harness for loose connections, burned insulation, or broken conductor strands; repair or replace damaged sections as needed and re-test. Check for proper voltage at the solenoid input when the ignition switch is in the start position, ensuring that the activation circuit receives power. Use a traceable wiring diagram to follow circuits from the ignition switch through the safety interlocks to the solenoid and starter, and address any shorted or open circuits with appropriate splicing or connector replacement.

Starter and charging system troubleshooting combine the above checks with functional tests to confirm system integrity under load. When the engine fails to crank, verify that the battery has sufficient charge and that high-current connections to the starter are clean and secure. Perform a bench test of the starter if you have access to appropriate tooling, observing all safety precautions to avoid mechanical injury or electrical shock. If the engine turns over but does not start, check for fuel and ignition system faults that could mask a starter issue; electrical diagnostics should confirm that the starter receives the necessary current and torque to engage properly. For charged systems, measure the alternator’s output under load and compare it with the specified charging voltage curve; inspect the drive belt for tension and wear, and replace if any signs of cracking or glazing are present.

Safety interlock system checks require ensuring that all interlocks perform reliably to prevent accidental engagement. Verify that the operator presence and seat/kill switches (or equivalent safety devices) interrupt the ignition circuit when not in use and allow engine operation only under safe conditions. Test each interlock by simulating unsafe scenarios and confirming that the engine does not start or shuts down as designed. Inspect the wiring to interlocks for continuity and verify that any redundant safety circuits engage consistently under fault conditions; document any intermittent behavior for further analysis. After repairs, recheck the complete interlock chain to confirm that the system returns to a safe, fault-free state and that normal operation resumes only when all conditions are satisfied.

The mower deck and drive system are the core components that ensure consistent cutting performance and reliable operation. Regular inspection of the deck belt, blades, drive belt, transmission, wheels, and pulleys helps prevent unexpected downtime and extends the life of your equipment. Begin with a clear work area, disconnect the spark plug or remove the ignition key for safety, and ensure the mower is on a stable surface before performing any checks or replacements. Use the correct model-specific belts and blades, and consult the service manual for torque specifications and part numbers to avoid improper fitment. Always replace worn parts in matched sets to maintain proper belt tension and balance, which contributes to smoother operation and longer service intervals.

Deck belt inspection and replacement involves checking the belt for wear, cracks, fraying, and glazing. Remove the deck cover and rotate the blade to inspect the belt paths for alignment and seating on pulleys. If the belt shows any signs of damage or excessive wear, replace it with the recommended OEM belt. When installing a new belt, ensure it sits fully in the pulley grooves and that the belt tracks correctly along the deck sheaves. After installation, recheck belt tension and adjust if necessary according to the manufacturer’s specifications. Periodic inspection during routine maintenance helps catch issues before they escalate into belt failure during cutting operations.

Blade replacement and sharpening are critical for a clean, even cut and to prevent unbalanced loads on the deck. Remove the blade using the proper wrench, ensuring the engine is off and the blade is secured to prevent rotation. Inspect the blade for nicks, cracks, or bending; replace any damaged blade with a new one of the same type and size. Balance the blade after sharpening by removing equal material from both sides or using a blade balancer, ensuring it spins true without alarming vibrations. Reinstall with the correct mounting hardware and torque to the specified value, maintaining proper blade orientation for optimal cutting performance and safety. Regular blade maintenance reduces strain on the engine and improves overall mowing results.

Drive belt and transmission servicing covers the belt that drives the ground wheels and any associated pulleys or tensioners. Inspect the drive belt for wear, cracks, or fraying and replace as needed. Check the transmission for proper lubrication, unusual noises, leaks, and smooth engagement when the drive control is engaged. If the drive belt tension feels excessive or insufficient, adjust the tensioner according to the service specs, ensuring even tension across all drive belt segments. When servicing the transmission, verify oil levels if applicable and use the specified lubricant or gear oil. Reassemble with attention to alignment of all components to prevent premature wear and ensure reliable momentum transfer during operation.

Wheel and pulley alignment ensures even cutting height and prevents uneven wear on the deck and belt system. Inspect all wheels for roundness and proper mounting, replacing any bent or damaged wheels. Check the pulleys for wear, groove damage, or misalignment; replace damaged pulleys and ensure belts seat properly in all grooves. Align the pulleys so that the belt path remains straight and true across the deck and drive system, adjusting guards or supports as needed. After alignment, manually rotate the deck and drive components to verify smooth operation without binding or unusual resistance. Correct wheel and pulley alignment improves cutting consistency, reduces belt wear, and contributes to safer mowing performance.

Lubrication and fluid recommendations for the CRAFTSMAN 917.273100 require careful attention to the specific lubricant types and the maintenance intervals to ensure optimal performance and a long service life. Begin with selecting products that meet or exceed the manufacturer’s viscosity and additive specifications, avoiding any lubricants that are not compatible with small engine component materials. Use clean containers and new parts when possible to prevent contamination that could compromise bearings, seals, and gears. Maintain a regular lubrication routine as part of the overall preventive maintenance schedule, aligning with the operating environment and duty cycle of the equipment. Always consult the equipment’s indicated service intervals and use the exact product recommendations when in doubt to avoid warranty concerns or performance issues.

Oil type and capacity are critical factors in ensuring proper engine performance and longevity. Most small engines in this class require a specific 4-stroke engine oil with a viscosity suitable for the operating temperature range. Verify the engine displacement and model-specific requirements to determine the correct oil grade, and never mix different viscosities in a single fill. Check the dipstick and fill under the correct ambient conditions to obtain an accurate measurement. The capacity figure includes oil in the sump plus any oil in the filter, if applicable, and overfilling can cause foaming and leakage while underfilling can lead to poor lubrication. After an oil change, run the engine briefly and recheck the oil level, adjusting to the precise mark recommended by the service manual.

Grease points and frequency must be identified before attempting any maintenance work. Most equipment of this type uses multi-purpose lithium-based grease or a high-temperature ergonomic alternative for joints, pivot points, and drive linkages. Apply a thin, even coat to each zerk fitting or greaseable surface, ensuring that moving components receive adequate lubrication without excessive overflow that could attract dirt. Frequency depends on usage patterns—labor-intensive or dusty environments typically demand more frequent greasing, whereas light or infrequent use may allow longer intervals. Document each grease event in a maintenance log to track wear patterns and anticipate component fatigue before it leads to a failure.

Drain and refill procedures require strict adherence to safety and environmental guidelines. Before initiating a drain, disconnect the spark plug, allow the engine to cool, and place the unit on a stable surface to prevent spills. Use the proper drain plug size and ensure all drainage fluid is captured in an approved container to avoid contamination of the work area. Replace the oil filter if the design includes one, using the recommended torque specification for installation. When refilling, measure the oil with the dipstick to the correct level, and perform a short engine run to circulate the new lubricant before performing a final level check again. Dispose of used oil and filters according to local regulations and manufacturer recommendations to protect the environment and maintain safety standards.

The engine failing to start or running poorly can stem from a combination of fuel, ignition, air, and compression issues. Begin by verifying the fuel supply, ensuring the tank is filled with fresh, clean gasoline and that the shutoff valve (if equipped) is in the correct position. Check for stale fuel, dirt in the line, or a clogged fuel filter, and inspect the carburetor for varnish buildup or incorrect jet sizing. Spark plug condition is critical; inspect the plug for fouling or wear, gap the electrode to the manufacturer's specification, and replace if necessary. Ensure the air intake is clear of debris and the air filter is clean or replaced, as restricted airflow can cause hard starting and poor running. If the engine still does not start, perform a basic compression check to determine if valves or piston rings are contributing to low compression, which would require deeper inspection or component replacement. In some cases, adjusting the choke or cold-start mechanism can resolve starting issues, but be cautious not to flood the engine and to return the choke to the correct position after starting. A persistent failure to start or rough running after all these checks may indicate a more advanced problem such as a timing or ignition coil fault, and professional service should be considered to prevent further damage.

Loss of power or performance is commonly linked to fuel delivery, air supply, or ignition system faults. Begin with a fuel system inspection, ensuring the fuel is clean and the lines are free of leaks or kinks. Replace old fuel and consider cleaning the carburetor jets to restore proper fuel metering. Inspect the air filter and housing for restrictions; a clogged filter can substantially reduce power and responsiveness. Confirm that the exhaust outlet is not blocked by debris, which can also mimic a loss of power by creating excessive back pressure. Check the ignition system for a strong, consistent spark across all cylinders, and examine the spark plug wires for cracks or arcing. If access to the engine reveals a vacuum or intake leak, apply a narrow spray of non-flammable carburetor cleaner around gaskets and hoses while the engine is running to detect a change in idle indicating a leak. By systematically addressing fuel, air, and ignition factors, most performance losses can be traced and corrected without major repairs.

Unusual noises or vibrations from the engine or chassis can indicate mechanical wear, loose components, or misalignment. Start by inspecting the blade spindle, mower deck, and belt pulleys for excessive play, cracks, or galling, tightening or replacing mounting hardware as required. Listen for scraping, grinding, or metallic knocking sounds that could point to bearing wear or a loose crankshaft component. Check the mower deck suspension and drive belt tension to ensure proper alignment and tension; misalignment can amplify vibrations and cause noise during operation. Inspect cooling fins or shrouds for obstructions that could cause overheating and subsequent rattling or ticking noises. If vibrations are felt through the handles, verify that the engine mounts are secure and there are no loose hardware or worn bushings. For persistent unusual noises, a careful teardown with attention to timing marks, gasket seals, and lubrication states can differentiate between a simple adjustment and a component failure needing replacement.

Deck and drive related faults often surface as uneven cutting, slow deck reaction, or transmission issues. Start by confirming the blade is sharp, balanced, and properly installed with the correct torque on the arbor nut. Check the deck belts for cracks, wear, or misrouting, and replace if necessary to restore smooth drive and deck operation. Examine the drive tires or wheels for wear, proper inflation, and grip; worn tires can cause slipping and reduced performance while mowing. Inspect the transmission linkage, control cables, and engagement clutches for proper operation, ensuring there is no binding or excessive play. Verify the deck height adjustment mechanism operates evenly across all wheels and that the cutting height is consistent with the user setting. Finally, inspect for any obstructions in the discharge chute or under the deck that could affect cutting quality and cause unusual resistance. Regular maintenance, including cleaning, lubrication, and timely replacement of worn parts, will help maintain reliable deck and drive performance and prevent common faults.

Disassembly and reassembly guidelines

Disassembly and reassembly of the CRAFTSMAN 917.273100 require a methodical approach to ensure safety and preserve component integrity. Begin by ensuring the unit is on a stable work surface with ample lighting and all power sources disconnected. Remove any external shields or covers that obstruct access to critical fasteners, keeping track of each screw type and length. Use a labeled layout mat or magnetic tray to organize bolts, spacers, and small components, which minimizes misplacement during the procedure. Establish a clear sequence for removal that aligns with the OEM design, and photograph steps when feasible to provide a reference during reassembly. Maintain a clean environment to prevent contamination of filters, seals, and gaskets, and wear appropriate personal protective equipment to guard against sharp edges or moving parts.

Proceed with step by step component removal by first isolating the power system and draining any residual fluids if the model includes a fuel or oil reservoir. Disconnect electrical connectors with a gentle rocking motion rather than pulling on wires, to avoid terminal damage. When removing assemblies such as the engine cover, bulkhead, or cooling components, support each part as it loosens to prevent abrupt drops that could injure you or scratch surfaces. Keep track of spacer rings, washers, and spring components, noting their original orientation to avoid misalignment on reassembly. If you encounter seized fasteners, apply a penetrating lubricant and allow it to dwell before carefully applying a suitable torque to prevent thread stripping. Document any damaged parts and set them aside for replacement to maintain overall system reliability.

Reassembly checks and torque specifications are critical to restore performance and safety. Begin by reinstalling subassemblies in reverse order of removal, ensuring that all gaskets and seals are correctly seated to prevent leaks. Use a calibrated torque wrench to tighten fasteners to the manufacturer’s specified values, paying attention to the sequence that promotes even loading and proper sealing. After securing major components, recheck all electrical connections for proper mating, insulation integrity, and correct routing away from hot surfaces or pinch points. Perform a functional test with the unit at idle and under load conditions as appropriate, listening for abnormal noises and watching for leaks or misalignments. Document any torque values and verification results for future maintenance references.

Parts identification and replacement tips focus on recognizing OEM part numbers and compatible substitutes. Maintain a parts inventory with model-specific references to ensure you obtain correct air filters, seals, and drive components. When removing wearable components like belts or brushes, inspect for wear patterns and measure against specification limits; replace if out of tolerance to prevent degraded performance. Use manufacturer-approved lubricants and adherents on moving joints and bearings, applying sparingly to avoid attracting dust. If a part is suspected to be damaged or beyond service life, consult the service manual’s parts table to confirm replacement suitability and to identify compatible upgrades. Finally, label any replaced components with date and service notes to support future diagnostics and scheduled maintenance.

Common wear items for the CRAFTSMAN 917.273100 include components that experience the most frequent degradation due to usage, exposure to the elements, and routine maintenance practices. These items typically encompass drive belts, spark plugs, air filters, blades, cutter housings, spindle assemblies, and deck wheels. Regular inspection should focus on signs of cracking, fraying, excessive wear, or distortion, as these conditions can compromise performance and safety. When replacing wear items, opt for parts that match the original specifications to maintain proper balance and cutting efficiency. Keeping a stock of pre-checked OEM or validated aftermarket equivalents helps minimize downtime during peak seasons. It is also advisable to replace gaskets and seals when you service related assemblies to prevent leaks and maintain optimal engine performance. In addition, examine the safety shields and operator presence controls for wear-induced gaps or stiffness that could affect safe operation.

Recommended parts suppliers for the 917.273100 should prioritize sources that provide verified compatibility information, genuine OEM options, and clearly stated warranty terms. Authorized CRAFTSMAN dealers and reputable industrial supply houses typically supply accurate part listings and cross-reference data. When ordering, include the model number, serial number, and a detailed description of the part to reduce the chance of incorrect items. It is beneficial to request exploded-view diagrams or part drawings to confirm fitment prior to purchase. For hard-to-find items, many suppliers offer refurbished or remanufactured components that meet or exceed original tolerances when properly rebuilt. Always verify warranty eligibility and return policies before finalizing a purchase to ensure coverage in case of defects or incorrect fitment.

OEM versus aftermarket components carry distinct implications for fit, durability, and performance. OEM parts are designed specifically for the 917.273100 and generally ensure the closest match to factory performance, but may come at a premium price. Aftermarket parts can offer cost savings and sometimes improved availability, but require careful selection based on supplier reputation, material quality, and compatibility data. When choosing between OEM and aftermarket, compare torque specs, thread sizes, and material grades to prevent improper installation or premature wear. Documentation from the supplier that confirms compatibility with the exact engine and deck configuration is essential. In some cases, high-quality aftermarket parts can meet or exceed OEM standards, provided they are sourced from manufacturers with demonstrated engineering controls and quality assurance processes.

Proper part numbering and cross references are critical for accurate maintenance work. Start by confirming the correct part number from the mower’s service manual, the label on the component, and the parts diagram. Use cross-reference guides to identify compatible substitutions when the exact number is unavailable, but only after verifying mechanical and electrical interface compatibility. Maintain a spreadsheet or log that correlates part numbers with purchase dates, supplier, and installed serials to support future service cycles. Keep the exact OEM nomenclature for essential components (for example, blade clamps, spindle housings, and drive pulleys) to avoid ambiguity in communication with suppliers. When in doubt, contact a certified technician or the manufacturer’s technical support line to confirm fitment before ordering any non-OEM parts.

Testing, alignment, and calibration procedures Cold and hot engine testing Begin by ensuring the engine and starter systems are cool before performing any testing. Disconnect the spark plug boot to prevent accidental starting and inspect the air filter, fuel system, and carburetor for signs of wear or leaks. Reconnect the ignition, apply full choke as appropriate, and perform a cold start to observe initial cranking speed, fuel delivery, and idle behavior. If the engine struggles to start or runs inconsistently when cold, inspect the ignition timing, spark plug condition, and carburetor adjustments. After the engine reaches operating temperature, conduct a hot start test to verify that starting reliability and throttle response remain consistent under heat soak conditions. Record any abnormal noises or smoke, and check for overheating indicators or coolant intrusion if applicable to the model. Throttle and governor adjustments Set the throttle linkage with the engine at idle and verify that the engine returns to idle promptly when the throttle is released. Inspect the governor arm, push rods, and linkage for smooth movement without binding, and ensure there is no play that could cause unstable idle or over-rev conditions. Use the manufacturer's specified idle speed and high-idle settings as reference, and adjust the high-speed stop screw or throttle stop as required to achieve stable operation across load changes. With the governor engaged, manually actuate the throttle to confirm that engine speed tracks the throttle input smoothly and without lag. After adjustment, recheck the linkage alignment at full throttle to confirm the engine reaches the intended maximum speed without overshoot or hunting. Blade alignment and balance Remove the spark plug boot and disable the ignition as a safety precaution while inspecting the blade path. Ensure the mower deck is level and the blade mounting bolts are torqued to the manufacturer's specification. Check blade balance using a simple balance test: mount the blade on a balancing rod and verify it remains level when spun; add weight to the lighter edge if necessary to achieve true balance. Misbalanced blades can cause vibration, rapid wear on bearings, and potential safety hazards, so address any signs of cracks, nicks, or uneven wear by replacing the blade. After balancing, re-install the blade with the correct orientation and tighten to the specified torque. Verify that the blade height setting corresponds with the user's preferred cut quality and that the mower deck alignment is free of side-to-side wobble. Safety switch tests Inspect all safety interlock switches within the drive system, blade engagement, and seat or handlebar positions to ensure they properly interrupt engine operation when a condition is violated. Use a multimeter or the service tools recommended by the manufacturer to confirm continuity and proper actuation at each switch. Perform a sequence test: attempt to operate the machine with the blade engaged, with the operator present and then absent, and with the parking brake or safety key in the incorrect position, ensuring that the engine prevents startup or immediately shuts down when a safety condition is breached. Document any switches that fail to interrupt power or engage correctly, and replace faulty components in accordance with the service manual. After repairs, conduct a full functional test to confirm all safety circuits engage reliably and that no unintended engine start occurs during typical operator actions.

End of season storage steps require a systematic approach to ensure the equipment remains ready for use when needed. Begin by draining fuel from the carburetor and fuel tank to prevent gum and varnish buildup that can hinder starting and engine performance. After draining, add a fuel stabilizer to a fresh supply of fuel if you anticipate storing for a short period, following the stabilizer manufacturer's instructions. Remove any spark plug(s) and spray a small amount of engine oil into the cylinder, then pull the starter handle a few times to distribute the oil and coat the internal surfaces. Reassemble the spark plug(s) and store the unit in a clean, dry area away from direct sunlight and sources of heat. Finally, label the machine with the storage date and any maintenance notes so future service can begin with context and clarity.

Cleaning and corrosion prevention are essential to extend the life of the unit and maintain performance. Start by removing loose debris from the exterior with a dry brush or compressed air, being careful around delicate components. Wipe down metal surfaces with a mild solvent and a soft cloth to remove dirt, grime, and any corrosion-prone residues. After cleaning, inspect fasteners and hardware for rust or loosening; apply a light coat of machine oil or a corrosion inhibitor to metal surfaces that show surface rust or are exposed to moisture. Ensure air intakes and cooling fins are clear and unobstructed to prevent overheating during use. Store cleaning rags and solvent containers in a safe, ventilated area away from the machine to avoid accidental ignition.

Documenting service performed is critical for ongoing maintenance and future troubleshooting. Create a concise record detailing the date, operators, and tasks completed, including inspections, adjustments, and parts replaced. Photograph or annotate notable wear patterns, blade or belt condition, and safety features to provide a visual history for reference. Maintain a current fault log if the unit exhibited any alarms, unusual noises, or performance changes, and note any deviations from the standard maintenance procedure. Keep copies of receipts for parts and fluids used, along with the next recommended service interval, so the owner has a clear plan for future upkeep. This documentation supports warranty compliance and can expedite future repairs by offering a complete service narrative.

Disposal of waste fluids and parts must be handled in accordance with local environmental regulations and manufacturer guidelines. Safely drain and collect used oil, fuel, and coolant in approved containers before disposal, never pouring them down the drain or on the ground. Recycle containers and used fluids at an authorized facility and maintain spill containment measures during transfer. Remove and dispose of worn or damaged parts, such as filters, seals, and gaskets, following the recommended recycling or disposal pathways. When replacing components, ensure that new parts meet the original equipment specifications and are installed following the correct torque values and safety procedures. Proper disposal practices protect the environment, comply with regulations, and uphold a standard of responsible maintenance.

The CRAFTSMAN 917.273100 service manual provides a comprehensive overview of the wiring diagrams, allowing technicians to trace electrical circuits with confidence. This section summarizes the general layout, common color codes, and connector design philosophies used throughout the mower's electrical system. By understanding the wiring diagrams, a technician can diagnose symptoms such as no-start conditions, fail-safe modes, and intermittent power loss more efficiently. It is important to verify battery voltage, ignition switch continuity, and safety interlock wiring as part of a methodical diagnostic approach. When making repairs, always refer to the diagram references corresponding to the exact model year and revision to ensure accuracy and safety.

Torque specifications are essential for ensuring fasteners are tightened to the manufacturer’s design intent, which affects engine performance, vibration control, and safety. The manual provides torque values for critical components such as blade adapters, crankcase plugs, pulley screws, and axle fasteners, as well as step-by-step tightening sequences for assemblies that require balanced clamping. Use a calibrated torque wrench and follow the recommended units and measurement methods to prevent overtightening or under-tightening, which can lead to premature wear or part failure. For fasteners that have a specified lubricated condition, confirm the lubrication status before final torque to avoid inaccuracies. Document any torque deviations and re-check critical joints after an initial run to confirm stability.

Lubrication schedules in this reference outline routine maintenance intervals to keep the machine operating smoothly and extend component life. The schedule covers engine oil changes, fuel system maintenance, and lubrication points on moving linkages, as well as greasing intervals for wheel hubs, zerk fittings, and deck bearings. Adhere to the manufacturer’s recommended oil viscosity and grade, and replace filters at the specified intervals to sustain performance and emissions compliance. Different operating environments, such as high-temperature or dusty conditions, may necessitate shortened service intervals; when in doubt, adopt a more conservative maintenance cadence. Maintain a log of lubrication dates and observed conditions to track wear patterns and anticipate part replacement needs.

Customer service contact information is provided to facilitate after-sales support, warranty assistance, and access to official parts catalogs. The manual typically lists phone numbers, email addresses, and hours of operation, along with guidance on how to initiate service requests or obtain technical bulletins. It also highlights the importance of providing model numbers, serial numbers, and a concise description of the issue to expedite resolution. For owners seeking replacement components, the documentation will direct you to authorized parts distributors and online portals with part numbers and compatibility notes. Retain proof of purchase and warranty documentation to streamline claims and ensure access to covered services.

When using this appendix and resources, technicians should cross-reference the wiring diagrams with live diagnostics to confirm circuit integrity before reassembling components. A methodical approach to torque verification, lubrication, and customer support coordination contributes to safer repairs and longer equipment life. The combination of accurate electrical schematics, precise torque specifications, clear lubrication schedules, and reliable contact information forms the foundation of effective maintenance for the CRAFTSMAN 917.273100. Practitioners should always adhere to safety protocols and use protective gear during all repair and service activities to protect themselves and bystanders.