CRAFTSMAN 917.377132 Service Manual
Overview and safety
The CRAFTSMAN 917.377132 is a compact, two-stage snowthrower designed for residential use, providing reliable propulsion, auger action, and chute rotation to efficiently clear light to moderate snow accumulations. Proper understanding of its core components, operating principles, and maintenance needs is essential to ensure safe and effective performance. Before engaging with any maintenance or operation, review the equipment's manual, verify all safety decals, and confirm that the unit is on stable, level ground with the spark plug wire disconnected during any service procedures. Grounding and electrical safety are paramount when working near the engine and electrical components to prevent accidental starts or shocks. Familiarize yourself with the location and purpose of emergency shutoff features so you can quickly halt operation if unusual vibrations, leaks, or smoke are observed.
Operator safety hinges on the use of appropriate PPE, including safety glasses, hearing protection, sturdy footwear, and gloves when performing maintenance or handling moving parts. Never wear loose clothing, jewelry, or anything that could become entangled in rotating components. Clear the work area of bystanders and pets, and ensure children are kept at a safe distance during testing or adjustments. When operating the snowthrower, maintain a firm stance, keep hands away from the auger housing and discharge chute, and avoid attempting to clear jams with bare hands. If a clog occurs, shut off the engine, remove the spark plug wire, and follow proper procedure to clear the obstruction using designated tools.
The 917.377132 relies on a gasoline engine and a belt-driven auger system, both of which require routine inspection for wear, cracking, or looseness. Before each use, check for fuel leaks, confirm fuel level and quality, and inspect the coolant (if equipped) and oil levels as applicable. Ensure that all guards, shields, and safety devices are in place and free of damage. Periodically examine the tires or drive system for proper inflation and tension, and verify that the chute rotation and deflector operation are smooth. Address any abnormal noises, vibrations, or performance changes promptly, as these can indicate an underlying fault that could compromise safety.
To minimize risk during operation, follow the manufacturer’s recommended warm-up procedures after startup to allow all moving parts to reach stable operating temperatures. Never attempt to modify or bypass safety features, as these protections are designed to prevent injury in common operating scenarios. Store fuel in approved containers away from heat sources and ensure the unit is cool before long-term storage. Regular maintenance logs should capture service dates, parts replaced, and observations of wear or corrosion to support timely interventions and extend the life of the equipment.
Tool and model identification
The 917.377132 is part of CRAFTSMAN’s line of mid-range snowthrowers intended for home use, featuring a compact chassis and an auger-assisted cleaning system. Identification begins with locating the model plate on the frame or near the engine, which lists the model number, serial number, and manufacturing date. Cross-reference these identifiers with the operator’s manual and service bulletins to ensure you are sourcing the correct parts and torque specifications for any replacements. A-detailed illustration or parts diagram can be essential when ordering repair components, as it clarifies the relationship between the auger, drive belt, chute mechanism, and control cables. When inspecting for compatibility of replacement parts, verify engine type, displacement, and carburetion details to avoid misfits that could impair performance or safety.
Common substitutions and compatible components should be documented in the service notes, including belt part numbers, fastener sizes, and gasket kits. If the unit has undergone prior repairs, confirm that the modifications align with original specifications or approved service bulletins. Use calibrated torque values and OEM-recommended fasteners to assemble critical subassemblies such as the drive train, auger housing, and chute mount. Maintaining an accurate record of model and serial numbers facilitates warranty validation and traceability for future maintenance cycles.
Safety procedures and PPE requirements
Before performing any maintenance, disconnect the spark plug wire and remove the key to prevent accidental startup. Drain fuel or manage fuel systems in a well-ventilated area away from ignition sources, and never operate the machine indoors or in enclosed spaces where carbon monoxide accumulation could occur. When lifting or supporting the snowthrower for service, use appropriate jack stands and wheel chocks to prevent unexpected movement and ensure the unit remains stable throughout the procedure. PPE should include impact-resistant safety glasses or goggles, hearing protection, cut-resistant gloves when handling sharp components, and steel-toed boots for protection against heavy parts.
During maintenance, avoid contact with hot surfaces such as the muffler or engine head, and allow adequate cooling time after shutdown. When cleaning or clearing debris from the auger and chute, use approved tools and avoid direct hand contact with moving parts. If you encounter fuel odors or leaks, stop work immediately, evacuate the area if fumes are strong, and address the source of leakage with appropriate containment and replacement of affected hoses or seals. Ensure that all safety devices, such as the auger control lever and chute lock mechanisms, are fully functional before returning the unit to service. Regularly inspect and replace worn or damaged components to maintain predictable performance and safe operation.
Specifications overview: The CRAFTSMAN 917.377132 is designed for reliable operation with a focus on user-friendly maintenance access and standardization of service procedures. Key specifications include engine displacement, ignition type, carburetion details, blade engagement mechanism, electrical system voltage, and safety interlocks. Precise values and tolerances should be verified against the manufacturer’s data plate and the official service manual, as variations can occur between production runs. This section provides general reference ranges and diagnostic considerations to help technicians quickly assess whether components meet expected performance parameters. Always cross-check measurements with calibrated tools to ensure accuracy and to avoid misdiagnosis based on superficial symptoms.
Diagnostic procedures and fault codes: A systematic approach to diagnosing faults begins with a clear symptom description, followed by confirming the issue with repeatable checks. Start with a visual inspection for obvious signs such as loose connections, damaged harnesses, or missing protective covers, then proceed to functional tests of each subsystem. Document any fault codes presented by the engine controller or safety interlock system, and translate codes into actionable repair steps using the manufacturer’s code reference. When codes are unclear, perform baseline measurements of voltages, resistances, and continuity to identify deviations from normal ranges. Record all findings and ensure that protective safety features are reenabled and tested after repairs to prevent recurrence of faults or operator risk.
Electrical system checks: Electrical system checks should begin with verifying battery health, charging system operation, and starter circuits, ensuring clean terminals and secure connections. Inspect the wiring harnesses for abrasion, pinched insulation, and proper routing away from moving parts or hot surfaces. Use a multimeter to measure key voltages at the ignition switch, solenoids, and sensors, noting any parasitic drains or unexpected voltage drops under load. Safety interlocks, such as seat or mower deck engagement switches, must be tested under simulated operating conditions to confirm reliable interruption of circuits when safety criteria are not met. Proper grounding and shield integrity are essential to prevent electromagnetic interference that could affect sensor readings or control performance.
Engine and fuel system checks: Engine and fuel system diagnostics focus on air-fuel delivery, ignition timing, compression, and exhaust management. Start with a compression test to establish baseline cylinder health, comparing results to manufacturer specifications. Inspect the air filter for cleanliness and ensure the intake passages are unobstructed, as restricted airflow can mimic other faults. Check the carburetor or fuel injection system for proper fuel delivery, float level, and choke operation, and inspect fuel lines for deterioration or leaks. Monitor exhaust backpressure and listen for abnormal exhaust sounds that may indicate internal engine wear or a blocked manifold. After adjustments or repairs, perform a thorough test run to observe engine performance across different loads, noting smoothness, power response, and any warning indicators on the control panel.
Disassembly and inspection
Disassembly procedures begin with ensuring the power source is safely disconnected and the equipment is stabilized on a clean, level work surface. Before any screws are removed, take comprehensive photos of the assembly from multiple angles to establish a reference for reassembly. Use the correct size screwdrivers and holding tools to prevent cam-out or rounding of fasteners, and organize fasteners by location in labeled containers. As components are removed, document their orientation and note any adhesive residues or burrs that could indicate prior improper servicing. Keep track of the sequence of disassembly steps to minimize the risk of damaging delicate linkages or control levers during teardown. If a fastener resists removal, apply penetrating lubricant and allow it to dwell before attempting extraction to avoid stripping threads or snapping studs. Remember to disconnect any electrical connections with care, using a magnifier if needed to identify connector types and locking tabs to prevent damage during separation.
Component inspection and wear assessment requires a methodical approach to each subsystem. Inspect the engine or power unit for scoring on the piston and bore, checking for warm-up discoloration or excessive carbon buildup that could indicate improper fuel metering. Examine the crankshaft, bearings, and seals for looseness, play, or oil seepage, as these symptoms point to wear that could compromise performance or safety. Evaluate the blade mounting, drive belts, pulleys, and clutch components for cracks, fraying, or glazing that would affect cutting efficiency or drive reliability. Look for warped housings, cracked brackets, or damaged control linkages that could alter throttle response or operator safety. For electrical systems, verify continuity, inspect wiring for insulation damage, and test switches and safety interlocks to ensure proper function before reassembly. Document all wear findings with precise measurements and, when possible, compare to the manufacturer’s tolerances to determine replacement necessity.
Replacement parts and compatibility require careful cross-reference with the service literature and parts diagrams. Confirm the exact model number, revision, and serial range of the unit to identify correct OEM components, avoiding aftermarket parts that do not meet original specifications. Maintain a list of compatible replacements and note any updated part numbers or service bulletins that supersede prior specifications. When selecting blades, belts, seals, or bearings, ensure the material grade, size, and coating meet the engine and deck design requirements to preserve performance and safety. During reassembly, replace wear-prone seals and gaskets with new items to restore the original sealing integrity. Use the recommended lubricants and torque values exactly as specified, and perform a cautious pre-test to confirm control responses and engine starting behavior before returning the machine to customer use. Finally, document all part replacements with part numbers, quantities, and date of service to support warranty compliance and future maintenance planning.
Maintenance and adjustments
Regular maintenance is essential to keep the CRAFTSMAN 917.377132 operating safely and efficiently. Establish a routine that aligns with the equipment’s usage and environmental conditions, and plan for periodic inspections even during dormant seasons. Begin with a clear inspection of all accessible components, noting any signs of wear, corrosion, or looseness. Maintain a clean work area and document each service to establish a history that can help diagnose issues quickly in the future. A systematic approach reduces the likelihood of unexpected downtime and prolongs the life of the machine.
Routine maintenance should be performed at first use after purchase, prior to the start of each mowing season, and at intervals recommended by the manufacturer. Create a checklist that includes battery, spark plug, air intake, and lubrication points. Replace or service parts according to wear indicators or manufacturer guidance to prevent performance degradation. Keeping a consistent schedule helps ensure optimal fuel efficiency, reliable starting, and steady cutting performance. Proper preventive care also minimizes the risk of accidents caused by mechanical failures.
Lubrication and belt adjustment
Lubrication reduces friction and wear on moving parts, extending the life of bearings, bushings, and drive components. Use the recommended lubricants and avoid over-application, which can attract dirt and cause buildup. Pay particular attention to the throttle linkage, deck spindle bearings, and drive system pivots, applying lubricant sparingly where indicated by the service manual. After lubrication, operate the controls briefly to distribute the lubricant evenly and listen for any unusual noises that might indicate binding or misalignment. Regular lubrication is a straightforward, cost-effective maintenance step that yields smoother operation and longer component life.
Belt adjustment is critical for consistent drive and blade performance. Inspect drive and deck belts for cracks, fraying, glazing, or glazing, and replace them if any signs are present. When adjusting belts, ensure proper tension as specified by the manufacturer, and verify alignment of pulleys and shafts. Misaligned belts can cause vibration, reduced power transfer, and accelerated wear. After adjustment, test the system at low speed to confirm smooth operation before proceeding to full-load use. Maintaining correct belt tension and alignment helps maintain cutting quality and reduces the risk of belt failure in demanding conditions.
Tension and alignment checks
Accurate tension and alignment checks ensure the mower operates predictably and reduces wear on the cutting system. Start by inspecting the blade spindle, deck, and blade mounting hardware for tightness and parallelism. Use a straightedge or manufacturer-recommended gauges to verify deck alignment relative to the blade and ensure even cutting across the full width of the deck. Misalignment can cause uneven cuts, increased vibration, and excessive stress on the drive and spindle assemblies. Address any misalignment promptly by readjusting mounts, replacing worn components, and rechecking the setup after a test run to confirm accuracy.
Chain and linkage tensions, where applicable, should be checked according to the manual, ensuring smooth, unbinding operation. Inspect crankshafts, drivetrains, and PTO connections for signs of wear or looseness, and tighten or replace parts as needed. Regularly inspect bolt heads, nuts, and fasteners to prevent loosening during operation, which can compromise safety and performance. After performing tension and alignment checks, perform a brief functional test in a controlled environment to verify there is no abnormal noise or resistance, and that all controls respond correctly. Thorough checks at regular intervals preserve machine reliability and operator safety.
Air filter and exhaust maintenance
The air filter protects the engine from dust and debris, maintaining optimal air-fuel ratios and preventing accelerated wear. Inspect the air intake system for blockages and clean or replace the air filter as recommended by the manufacturer. In dusty or high-use environments, check the filter more frequently and ensure the air passages are clear to prevent reduced engine performance. When servicing, allow the engine to cool before handling, and follow proper disposal protocols for used filters. Clean, well-sealed air pathways support efficient combustion and smoother engine operation during heavy workloads.
Exhaust maintenance is a critical aspect of safe and efficient operation. Inspect the muffler, heat shield, and exhaust routing for signs of damage, corrosion, or leaks. A damaged exhaust system can lead to increased noise, reduced engine efficiency, and potential environmental concerns. Ensure all exhaust components are securely fastened and free of obstructions that could affect backpressure. Periodic inspection of the exhaust system helps maintain engine performance, reduces fuel consumption, and minimizes the risk of exposure to harmful emissions for the operator and bystanders.
Troubleshooting and repair procedures
Common issues and troubleshooting steps When addressing common issues with the CRAFTSMAN 917.377132, begin with a systematic inspection of the most likely failure points. Begin by confirming proper fuel quality and supply, as degraded fuel or contaminated lines can cause erratic starting, misfires, or loss of power. Inspect the air intake path for obstructions, including debris in the filter housing, which can restrict airflow and reduce engine performance. Examine the spark plug for wear, fouling, or improper gap, replacing it if necessary to restore reliable ignition. Check the carburetor linkages and governor adjustments, ensuring they move freely without binding and are calibrated to the correct throttle positions. Finally, verify that the blade brake and PTO mechanisms engage correctly and do not interfere with engine operation, as a stuck or misadjusted brake can affect starting and safety. For electrical-related symptoms, perform a voltage check on the battery and charging system, ensuring connections are clean and terminals are tight to prevent intermittent operation. Inspect the wiring harness for signs of chafing, corrosion, or loose connectors, particularly around the ignition coil, safety interlocks, and the spark plug wire. If the engine cranks but does not start, perform a spark test to confirm spark presence at the plug end, and verify that the ignition switch and safety switches are functioning within their designed parameters. In cases of sudden power loss, assess fuel shutoff valves and fuel filter condition, replacing clogged filters to restore proper fuel flow. When diagnostic codes or abnormal indicators appear on any installed instrument cluster, consult the service manual’s wiring diagrams to trace circuits and confirm component integrity. Repair procedures for fuel system Repair procedures for the fuel system require careful, methodical steps to avoid air locks and improper fuel delivery. Start by draining any remaining fuel from the carburetor and fuel tank, then replace the inline fuel filter to ensure clean fuel reaches the carburetor. Remove and inspect the fuel line for cracks, kinking, or loose fittings, replacing any damaged segments with OEM-grade hose and clamps. Rebuild or service the carburetor as needed, paying close attention to the float height, needle seat, and idle screw to achieve stable idle and smooth acceleration. Clean all passages with a carburetor spray and use compressed air to clear jets, avoiding damage to delicate orifices. If a fuel shutoff valve is installed, verify it opens fully during cranking and when under load, replacing any valve that binds or leaks. After reassembly, perform a careful idle and throttle synchronization procedure to ensure consistent engine response across the full RPM range. Finally, confirm there are no fuel leaks at connections or gaskets after the system is pressurized. Electrical system repair guidelines Electrical system repairs should be conducted with the battery disconnected to prevent accidental starts and arcing. Start by inspecting and cleaning battery terminals, replacing corroded hardware and applying terminal grease to resist future corrosion. Trace the harness for damaged insulation, broken conduits, or pinched wires, repairing or replacing compromised sections with the correct gauge wire and heat-shrink terminations. Review ignition components, including the spark plug wire, ignition coil, and ignition switch, performing resistance measurements and continuity tests as specified by the service data. For safety interlocks, confirm that each switch in the safety chain properly interrupts ignition when engaged or disengaged, adjusting mounting points if misalignment is detected. When performing repairs in areas with exposed connectors, use dielectric grease on waterproof connections to maintain reliability in adverse conditions. After completing electrical work, perform a full system test, including cranking torque, engine start, and safety interlock verification, to ensure all circuits operate within design limits without false positives or missed activations. Diagnostics after repairs Following any repair, document the procedures performed and recheck the engine and mowing system under load to validate repair effectiveness. Begin by starting the engine and confirming stable idle and correct throttle response, then gradually apply load to verify consistent RPM and power delivery without stalling or surging. Monitor engine temperatures and look for abnormal smoke, odors, or overheating indicators that could signal lingering issues or incorrect fuel-air mixture. Use the diagnostic tools outlined in the manual to read fault codes from any onboard computer module, if equipped, and compare them to the service data for confirmation of repair success. Perform a field test with a representative mowing load to ensure the mower maintains ground speed, drive engagement, and blade operation without abnormal vibrations. Finally, perform a thorough inspection of all fasteners, guards, and safety devices to ensure they remain secure after tests, re-torque critical connections as required, and provide the operator with a concise post-repair checklist to prevent recurrence of the identified issues.The reassembly procedures require meticulous attention to the sequence and orientation of every component removed during the disassembly process. Begin by verifying that all fasteners are clean, selected for the correct size, and sorted to match their original locations. When reinstalling parts, apply the manufacturer’s specified torque values in a gradual, cross-pattern to ensure even seating and prevent distortion. Use new gaskets or seals where indicated, and lubricate moving interfaces with the recommended lubricants to restore proper clearances and reduce wear. After each major subassembly is complete, perform a visual inspection to confirm there are no misaligned parts, burrs, or foreign material that could cause binding or improper function. Finally, recheck drivetrain and linkage alignments to ensure smooth operation through the full range of motion before proceeding to functional testing.
Function tests and verification are conducted to confirm that the repaired unit operates within factory specifications. Initialize the system on a bench or suitable stand, ensuring power sources and safety interlocks are in proper state. Run the engine or motor through its normal operating cycle, observing for abnormal vibrations, overheating, or unusual sounds. Check control interfaces, including throttle, brake, and safety engagement mechanisms, to verify that responses are instantaneous and proportional. Use diagnostic test procedures to confirm sensor inputs, ignition timing, fuel delivery, and lubrication systems are within prescribed tolerances. Record all readings methodically and compare them to the service manual’s reference values, repeating measurements if any irregularities are detected. If deviations persist, isolate the subsystem and re-evaluate connections, seals, and fasteners before retesting to avoid masking an underlying issue.
Safety final checks are essential to ensure the unit is safe for operator use and compliant with original equipment standards. Confirm that all guards, shields, and protective covers are correctly installed and secured, with no gaps or loose fasteners. Inspect the exhaust, muffler, and cooling systems for leaks or blockages that could pose hazards during operation. Verify that fuel, oil, and hydraulic lines are free of signs of wear, cracking, or leakage, and replace any compromised components before proceeding. Ensure that starting procedures, kill switches, and emergency shutoffs function reliably, and that warning labels are intact and legible. Finally, perform a brief operational test under safe conditions to verify that all safety features engage as intended and that the machine stops promptly when commanded, documenting the results for maintenance records and future reference.
The Appendix and Resources section consolidates critical reference materials for maintaining and repairing the Craftsman 917.377132 mower. It serves as a practical compendium for technicians who require quick access to parts, wiring details, and documented service history. By keeping comprehensive records, you can track part replacements, service intervals, and tool calibrations, ensuring consistent performance and safer operation over time. This section emphasizes accuracy, orderliness, and accessibility of information so that future maintenance tasks can proceed with confidence and efficiency.
Parts and accessory lists provide a definitive inventory of compatible components, consumables, and attachments for the 917.377132 model. A thorough understanding of the proper part numbers, descriptions, and compatibility ensures that substitutions do not compromise safety or functionality. When ordering replacements, cross-reference the original equipment manufacturer specifications and the corresponding Craftsman part catalogs to avoid errors. Keeping an up-to-date parts list reduces downtime and facilitates smoother repairs by enabling rapid identification of required items before disassembly begins. Regular verification of these lists against on-hand stock helps maintain readiness for essential maintenance windows.
Wiring diagrams and schematics are essential for diagnosing electrical issues, understanding circuit flows, and tracing harness connections in the mower’s electrical system. A meticulous review of the diagrams allows technicians to identify short circuits, opens, or grounding problems without resorting to guesswork. It is important to observe color-coding, connector pinouts, and terminal locations when performing repairs or modifications. Labeling wires during disassembly and reassembly can prevent miswirings and protect the operator from potential hazards. Always work with the machine powered down and the battery disconnected when inspecting or altering electrical circuits to minimize the risk of shock or damage.
Maintenance log and records create a documented history of service, repairs, and part replacements. Recording dates, observed symptoms, actions taken, and test results provides a reference for future troubleshooting and optimization. A well-maintained maintenance log helps establish predictable performance patterns and can reveal recurring issues that warrant proactive attention. Include notes on filter changes, blade or cutter inspections, belt tensions, lubrication intervals, and safety system checks. Regularly reviewing the maintenance log supports compliance with recommended service intervals and extends the service life of the equipment by guiding timely interventions.
In practice, these resources should be stored in a centralized, organized system accessible to authorized personnel. Maintain digital backups of schematics and parts catalogs, alongside physical copies kept in a labeled binder or cabinet. Establish a routine for periodic updates whenever new parts, service bulletins, or safety advisories become available. This approach ensures that the service team can quickly reference accurate information, perform precise repairs, and uphold the safety and reliability of the Craftsman 917.377132 mower through all subsequent use.