CRAFTSMAN 917.273021 Service Manual

General information and scope: The CRAFTSMAN 917.273021 is a type of outdoor power equipment that combines cutting, mulching, and propulsion functions designed for residential lawn care. This section provides a clear framework for understanding the unit’s basic assembly, intended use, and maintenance requirements to ensure reliable operation over the service life of the machine. Operators should become familiar with the model’s identification plates, rated engine type, deck size, cutting height ranges, and any accessory attachments that influence performance. A careful review of the manufacturer’s labeling and the service manual helps prevent improper modifications and supports safe, efficient servicing. Routine checks, part inspections, and documented service intervals are essential for maintaining performance and extending component longevity. Regular attention to these details reduces the likelihood of unexpected downtime and costly repairs.

Safety precautions and personal protective equipment: Prior to any maintenance or inspection, disengage the engine, remove the spark plug wire or disconnect the battery as applicable, and ensure the machine is on a stable, flat surface with the parking brake engaged or the transmission secured. Always allow the engine and moving parts to come to a complete stop before touching any components; hot surfaces can cause burns, and moving blades can cause severe injury. When performing tasks near the blade, use a thick, cut-resistant glove and wear eye protection, hearing protection, and sturdy footwear to guard against projectiles, debris, and tool mishaps. Keep children and bystanders at a safe distance and never work on the machine in wet or damp conditions, as electrical hazards and reduced footing increase risk. Ensure proper ventilation when starting or running the engine indoors or within enclosed spaces to avoid buildup of exhaust gases and carbon monoxide. Finally, follow lockout/tagout procedures when performing electrical or mechanical work, and consult the manufacturer’s torque specifications and service notes to avoid over-tightening fasteners or misaligning components.

Further safety considerations include verifying that all guards, shields, and guards are properly installed and intact before operation. Inspect blades for nicks, cracks, or excessive wear and replace them if balance or integrity is compromised; a damaged blade can cause vibration, noise, and unpredictable behavior. Confirm that the precautionary disclosures on fuel handling, oil levels, and air filter condition are understood, and adhere strictly to the recommended service intervals and lubrication points. When transporting or storing the equipment, secure it against movement and drain fuel appropriately according to environmental guidelines. Ultimately, a disciplined approach to safety, combined with proactive maintenance, preserves both operator well-being and equipment reliability over the life of the machine.

Specifications and model details

The CRAFTSMAN 917.273021 is a compact outdoor power equipment unit designed for home lawn maintenance. It combines dependable propulsion with efficient cutting performance suited for small to mid-size yards. The model features a robust chassis and user-friendly controls that enable straightforward operation for both new and experienced users. Detailed identification data, including the model number and serial information, should be verified on the nameplate located on the machine deck or near the engine housing to ensure compatibility with replacement parts and service procedures. This section provides critical measurements and capability data that technicians use to diagnose issues, select appropriate replacement components, and schedule routine maintenance to maximize longevity and reliability.

Machine identification and specifications for this unit typically include engine displacement, power output, drive system type, transmission classification, cutting width, and deck material. The engine specification often lists horsepower, rpm, and manufacturer origin, which guide fuel and lubrication recommendations. Important dimensions such as overall length, width, height, and turning radius influence storage considerations and maneuverability in constrained spaces. The drive system's configuration—whether it utilizes a belt-driven or hydrostatic setup—affects drive performance, maintenance intervals, and potential failure points. Having precise specifications on hand helps service technicians perform accurate inspections, verify warranty eligibility, and execute correct torque values during fastener reassembly after service procedures.

Recommended fluids and lubricants are essential for preserving engine health, transmission performance, and deck components. Always consult the operator’s manual and the service documentation for exact viscosity grades and approved brands, but the typical guidance includes unleaded gasoline of appropriate octane and clean, fresh lubricant for the engine. The lubrication schedule often covers engine oil type and capacity, spark plug gap, and air filter maintenance intervals to maintain optimal combustion efficiency and power output. For transmissions or hydro gear systems, specific hydraulic fluids or gear oils are specified to ensure smooth engagement, proper cooling, and long service life. It is critical to use the correct lubricants when performing maintenance or repairs, as incorrect fluids can cause overheating, reduced efficiency, and accelerated wear. Regular checks of fluid levels, container cleanliness, and seal integrity help prevent contamination and extend the lifespan of expensive components such as bearings, belts, and pulleys. Maintaining a disciplined fluid and lubricant regimen supports consistent starting performance, safer operation, and easier diagnostics during servicing.

Routine maintenance and inspections are essential to keeping your equipment operating safely and efficiently. Establish a regular cadence for inspections and perform preventive tasks with careful attention to manufacturer recommendations. Begin each session with a thorough visual check for obvious signs of wear, loose fasteners, and fluid leaks. Use a clean, well-lit workspace and keep a maintenance log to track findings, actions taken, parts replaced, and dates. This proactive approach helps prevent costly repairs and extends the service life of the machine.

Daily maintenance checklist

At the start of every operation, perform a concise daily inspection to confirm basic functionality and identify any immediate hazards. Check fluid levels, including oil and fuel, and verify that coolant levels are within the recommended range. Inspect belts and hoses for signs of wear, cracking, or fraying, and replace any damaged components before use. Ensure that air filters are clean and free of blockages, and remove any debris from air intakes to maintain optimal engine performance. Finally, confirm that safety systems, guards, and emergency stops are intact and operate smoothly before proceeding with tasks.

Periodic maintenance schedule

Develop a periodic maintenance timetable based on hours of operation and environmental conditions. This schedule should include more thorough tasks such as changing engine oil and filters, inspecting the spark plug (for compatible models), and replacing fuel filters at the intervals specified by the manufacturer. Regularly inspect the undercarriage, drive system, and any bearings for wear, lubrication needs, and proper play. Document each service event, including part numbers, service dates, and mileage or operating hours, to support warranty compliance and resale value. Align the maintenance intervals with your operating conditions, increasing frequency in dusty, humid, or high-load environments to preserve performance and reliability.

Undercarriage and drive system care

Care for the undercarriage and drive system by removing accumulated dirt, mud, and vegetation that can cause corrosion or impede movement. Inspect drive belts, chains, and sprockets for proper tension, alignment, and wear; replace components that show signs of cracking, glazing, or excessive elongation. Lubricate fittings and pivot points as specified by the service manual, using the recommended lubricants and quantities to avoid over-lubrication, which can attract debris. Examine the track or wheel assemblies for even wear, damaged mounts, and secure fasteners, tightening as needed according to torque specifications. Schedule a more detailed drive system inspection during periodic maintenance to address any unusual noises, vibration, or performance declines, and ensure all safety guards around the undercarriage are present and correctly secured.

Diagnostics and troubleshooting

Common issues and causes: When a piece of outdoor power equipment like the CRAFTSMAN 917.273021 exhibits symptoms such as failure to start, intermittent operation, or loss of power, begin by verifying basic fuel and electrical conditions. Check fuel quality and freshness, ensuring the correct fuel mix if applicable, and inspect for stale or contaminated fuel that can cause hard starting or rough running. Inspect the air filter for clogs or excessive dirt, as a restricted intake reduces efficiency and can lead to sputtering or stalling. Examine the spark plug for wear, fouling, or improper gap, since a degraded or fouled spark plug is a common root cause of misfires and starting problems. Additionally, assess the carburetor for flooding or icing symptoms, which can result in a strong odor of fuel or difficulty maintaining idle. Finally, review the exhaust and muffler for obstructions or accumulated debris that may impair exhaust flow and performance, particularly if the unit runs hot or loses power under load.

Diagnostic procedures and tools: Start with a visual inspection to identify obvious damage, loose connections, or missing fasteners that could affect safe operation. Use a spark plug tester or remove the spark plug to inspect its condition and measure the gap against the manufacturer’s specification; replace if worn or fouled. For fuel-related concerns, drain a small amount of fuel from the tank or line to check for ethanol content, water presence, or varnish buildup in the carburetor. A compressed air or spray-cleaning technique can be used to clear air passages in the carburetor and intake tract after removing the air filter. When diagnosing electrical issues, verify battery voltage (if applicable) and inspect wiring harnesses for chafing or corrosion, using a multimeter to check continuity and resistance where necessary. If the mower is equipped with a safety shutoff switch or shutoff lanyard, ensure they engage properly and are not degraded, as these components can prevent starting or kill the engine under load. Document all findings and compare them to the service manual specifications to determine whether cleaning, adjustment, or replacement is required, and always perform tests after any maintenance to confirm proper operation.

Additional troubleshooting steps: If starting and throttle response remain problematic after addressing basic fuel, air, and spark components, perform a thorough compression check to rule out internal engine wear such as worn rings or a leaky valve. A significant loss of compression will manifest as reduced power and rough running, indicating a need for more extensive repair. Inspect the blade adapter and spindle assembly for binding or excessive play, as a damaged or unbalanced blade system can cause vibration that affects performance and safety. Verify the role of the governor mechanism, ensuring it maintains proper engine speed under varying loads; a malfunctioning governor can cause surging or unstable RPM. For electrical-start models, evaluate the charging system’s ability to maintain battery voltage during operation, and test the solenoid for proper engagement; a faulty solenoid can prevent the starter from delivering cranking current. Finally, perform a comprehensive functional test by operating the unit under typical load conditions, listening for abnormal noises, watching for smoke or fuel leaks, and confirming that controls respond predictably to operator input.

Disassembly and assembly guidelines

Preparation begins with securing the work area to prevent loss of small components and to minimize the risk of injury. Disconnect the spark plug wire and remove the battery or spark source if applicable, ensuring the engine cannot start unexpectedly. Gather the proper tools, including metric and SAE sockets, screwdrivers, pliers, a torque wrench, and a parts tray to organize fasteners by location. Clean the exterior surfaces of the equipment to reduce the chance of dirt contaminating internal components during disassembly. Review the model’s identification plate to confirm prior part numbers and ensure you are working with the exact machine configuration documented in the service manual.

Safety steps include wearing protective eyewear, gloves, and sturdy footwear. Work on a clean, level surface with the engine cool to avoid burns. Use a labeled container for used fluids and follow local regulations for disposal. Take multiple reference photos before removing any fasteners to establish a visual log for reassembly. If a component appears corroded or overly damaged, image documentation should accompany any part replacement decisions to support proper torque specifications and reassembly alignment.

Removal and replacement procedures require systematic attention to order and orientation. Begin with detachable covers and guards, noting their position and the sequence of fasteners. When removing components connected by cables or linkages, label each connection to prevent misrouting during reassembly. For every fastener, record the location, size, and thread pitch to ensure accurate replacement and to avoid cross-threading. As parts are removed, inspect mating surfaces for wear, warping, or contamination, and clean or replace as needed according to the guidelines in the manual. Use a parts tray with labeled sections to keep track of small items such as washers, springs, and screws, reducing the risk of misassembly or lost components.

During replacement, recheck alignment of any gears, pulleys, or shafts and ensure proper seating of gaskets and seals. Apply appropriate lubricants in conformity with the specification sheets, avoiding over-application that could attract debris. After reinstallation, perform a dry run to verify that moving parts operate smoothly before reinstalling covers and guarding. Finally, restore fluids to the recommended levels, reconnect the ignition or spark source, and perform a cautious test run in a safe area to confirm that systems are functioning correctly and that there are no abnormal noises or leaks.

Engine and fuel system service

The engine and fuel system are critical to reliable operation and longevity of your outdoor power equipment. Begin any service by ensuring the unit is cool, the spark plug wire is disconnected, and the battery (if equipped) is isolated to prevent accidental starting. Visually inspect the fuel lines, clamps, and fuel tank for signs of wear, cracking, or leaks. Replace any damaged hoses or fittings before proceeding to more detailed work. Gather the appropriate replacement parts, fresh fuel, and a clean workspace to avoid introducing debris into the fuel system during maintenance.

Fuel system inspection and cleaning focuses on removing stale fuel and built-up varnish that can hinder performance. Drain the fuel tank into an approved container and dispose of it according to local regulations if it shows signs of ethanol separation or contamination. Remove the carburetor and visually inspect the jets and passages for obstructions or varnish; use professional carburetor cleaner and soft brushes to clear deposits. Do not pry delicate passages with metal tools, as this can damage critical passages. After cleaning, reinstall gaskets and seals with care to prevent air leaks that can affect fuel metering and idle stability. Refill with fresh, clean fuel appropriate for your engine and check for leaks around all connections once reassembled.

Engine tune up and timing adjustments require precise procedures to restore peak performance and economy. Begin with a thorough inspection of the air filter, noting any signs of damage or excessive soiling; replace if necessary and ensure the air intake is free of obstructions. Inspect and gap the spark plug to the manufacturer’s specification, and replace if it shows excessive wear or fouling. If the unit has a valve train or timing marks, carefully set the timing to the recommended specification using the correct tools and follow the service manual’s tolerances. Adjust the idle speed and mixture screw settings as required for smooth idling and responsiveness under load; avoid overly lean or rich settings that can cause overheating or carbon buildup. After completing timing and tune adjustments, run the engine at a variety of speeds to verify stable operation, pulling a minimum eight to ten minutes of run time to confirm consistent performance and to allow any new fuel to circulate fully through the system.

Safety considerations are essential throughout engine and fuel system service. Always work in a well-ventilated area away from ignition sources, and keep a suitable fire extinguisher on hand in case of fuel leaks. Wear eye protection and gloves to protect against contact with fuel and solvents. Disconnect the spark plug or power source during maintenance to prevent accidental starts, and store all flammable liquids in approved containers with proper labeling. After completing service, perform a final leak check at all fuel connections and confirm that the engine starts, runs smoothly, and disengages properly when the control is released. Document all maintenance performed, including part numbers, dates, and engine hours, to support future servicing and warranty requirements.

For optimal longevity, implement a preventive maintenance schedule that includes periodic inspection of the fuel system, air filtration, and ignition components. Keep a log of service intervals and observed symptoms to help diagnose issues quickly should they reappear. This proactive approach reduces downtime and extends the life of your equipment, ensuring dependable performance when you need it most. Regular cleaning and careful assembly according to the manufacturer’s specifications will yield the best results and minimize the need for major repairs in the future.

Always consult the specific model’s service manual for torque specifications, step-by-step procedures, and any model-variant differences. While the general principles outlined here apply to most engines within this family, exact values and sequences can vary between production runs. When in doubt, seek guidance from a qualified technician or the manufacturer’s technical support to prevent inadvertent damage or safety hazards during maintenance.

The electrical system and wiring in the CRAFTSMAN 917.273021 are designed to maximize reliability while delivering consistent performance under typical outdoor conditions. Before performing any work, disconnect the spark plug wire and ensure the engine is cool to prevent accidental starts. The wiring harness is routed to minimize exposure to moisture, debris, and vibration, with protective conduits and grommets at junctions to reduce chafing. A clear layout of the harness allows for quick visual checks of insulation integrity, terminal connections, and routing relative to moving components such as the drive belt and steering linkages. When inspecting the wiring, pay particular attention to exposed conductors, loose terminals, and signs of heat damage that could indicate an overloaded circuit or a failing component. A systematic approach to tracing circuits with a multimeter can identify open circuits, shorts to ground, or incorrect voltage, ensuring that the system operates within the manufacturer’s specifications.

The electrical diagram overview provides essential references for diagnosing faults. Begin by locating the battery or power source, if applicable, and identify the main fuse or circuit breaker as the first line of protection. Trace the positive and negative leads to major subsystems such as the ignition, charging system, lighting, and accessories. The diagram should indicate connector pinouts, color codes, and the expected voltage ranges at each test point under normal operation. When a component is suspected, consult the diagram to verify whether the problem is isolated to a specific branch or if it involves shared grounds or common power rails. This overview helps you rapidly distinguish between sensor failures, actuator faults, and wiring issues, enabling a targeted repair rather than a blanket replacement approach. Always use the correct wiring schematic for the exact model revision to avoid misinterpretation and potential component damage.

Troubleshooting and repairs for common faults require a structured methodology. Start with the most accessible checks, such as fuses, battery connections, and visible shorts, before moving to more intricate tests. If an engine or equipment failure is reported, verify that the ignition switch, safety interlocks, and kill switch circuits function properly, as failures in these areas can mimic other electrical problems. Use a digital volt-ohm meter (DVOM) to confirm continuity and measure resistance against specified values in the service manual. When diagnosing a charging issue, inspect the alternator or charging regulator, wiring to the battery, and related fuses, ensuring voltage output falls within the manufacturer’s guidelines during both idle and under load. For intermittent faults, consider environmental factors like corrosion, moisture intrusion, or temperature variations that can affect connector integrity and insulation; reseating connectors and applying dielectric grease where indicated can often restore reliable operation. Finally, replace any damaged connectors or insulation, and reassemble using the original torque values and routing to preserve safety and performance.

In practice, a disciplined workflow reduces rework and extends component life. Document all measurements, part numbers, and repair steps to maintain a clear service history for the unit. When removing or reinstalling wiring harnesses, label connectors and terminals to ensure correct reconnection, especially in harnesses with multiple similar plugs. After completing repairs, perform a comprehensive system test that covers power-on checks, sensor readings, and functional tests of all electrical subsystems under typical operating conditions. A final inspection should confirm that all wires are secured away from hot surfaces and moving parts, and that protective covers and shields are properly reinstalled. By following these guidelines, technicians can achieve reliable performance and prolong the service life of the 917.273021’s electrical system.

Note: Always follow the manufacturer’s safety precautions and use only approved replacement parts. If you are unsure about any procedure or encounter a fault beyond your current capability, consult a qualified technician. Electrical work carries the risk of shock or fire if performed improperly, and proper isolation, grounding, and testing are essential to safe operation. This manual section aims to guide routine diagnosis and maintenance, while complex failures may require professional service to restore peak performance.

The hydraulic system in the CRAFTSMAN 917.273021 combines a compact hydraulic pump with a set of control valves designed to manage lift and tilt functions for the mower deck and attachments. Proper operation relies on clean fluid, correct pressure, and leak-free seal interfaces throughout the reservoir, hoses, and fittings. Inspect all hydraulic lines for cracks, bulges, or signs of abrasion, and replace any damaged components before attempting further diagnostics. When servicing, always purge air from the system and verify fluid compatibility with the hydraulic reservoir to prevent potential material degradation and performance loss. Maintain a strict cleanliness protocol during any disassembly to avoid contamination that could compromise pump efficiency and valve response.

The hydraulic reservoir should be checked for fluid level and clarity, with the fluid color appearing clean and amber to light red depending on use. Use the manufacturer-specified hydraulic fluid and avoid mixing different oil types, as incompatible blends may reduce lubrication effectiveness and accelerate wear on seals and internal components. Periodically replace the hydraulic filter according to maintenance intervals or after significant contamination events, as a clogged filter can reduce flow, increase pressure drop, and impair control accuracy. Monitor reservoir temperature during extended operation because overheating can accelerate fluid breakdown and degrade actuator performance. Always bleed the system after performing component service to prevent trapped air from causing spongy controls or inconsistent lift and tilt responses.

The control linkage and adjustment procedures require careful alignment of mechanical and hydraulic components to ensure precise and predictable operation. Start by inspecting all linkage joints for play, wear, and secure fasteners, tightening or replacing parts as needed to maintain a crisp control feel. Calibrate the control levers to align with the mechanical stops and hydraulic actuator positions, confirming that corresponding valve positions translate to the intended hydraulic outputs. When adjusting, perform incremental tests after each change to verify that lift, lower, and tilt motions respond smoothly without binding or overrun. Document all adjustments with reference to the service manual settings, so future maintenance can resume from a known baseline. Conclude by rechecking fluid levels after adjustment testing and ensuring that all protective covers and shields are reinstalled to prevent accidental contact with moving parts.

During diagnostics, confirm that the hydraulic pump maintains proper flow and pressure within the designed range. Use a calibrated gauge to measure system pressure at the test port and compare readings to the specified values in the service documentation. If pressure is low, inspect for fluid leaks, restrictors, or partially closed valves that might be throttling flow, and replace defective components as necessary. If stall or uneven motion occurs, investigate potential air ingress, exhaust restrictions, or worn actuator seals that could cause inconsistent performance. When replacing seals, choose compatible materials and observe proper torque values on fittings to avoid causing leaks or distortions in the hydraulic circuit. Regular performance verification after maintenance ensures reliable control and extends the service life of the hydraulic components.

Safety remains a primary consideration throughout hydraulic and control system work. Always de-energize and lock out the equipment before starting any inspection or disassembly, and relieve all stored hydraulic pressure to prevent injury. Wear appropriate PPE, including eye protection and gloves, to guard against fluid exposure and pinch points. Dispose of old hydraulic fluid and used filters according to local environmental regulations to minimize ecological impact. Recheck the entire system for leaks after reassembly and perform a test run at low speed to confirm safe operation before returning the machine to normal use. Keeping records of failures, repairs, and adjustments will help optimize future maintenance and improve overall reliability of the hydraulic and control systems.

For optimal performance, establish a routine that includes periodic hydraulic fluid analysis, filter replacement, and linkage inspection aligned with operating hours. Monitor for gradual changes in control responsiveness, which can indicate creeping wear or contamination migrating through the system. Address issues promptly to prevent secondary damage to pumps, valves, or actuators that could lead to costly repairs. By following these procedural guidelines, technicians can maintain precise control, reduce downtime, and extend the service life of the hydraulic and control systems in the CRAFTSMAN 917.273021.

Deck and cutting system maintenance

The deck of a ride-on or push mower is the foundation of the cutting system, and proper maintenance begins with a thorough inspection and meticulous cleaning. Start by removing the spark plug wire for safety, then inspect the deck surface for cracks, rust, or bent edges that could affect blade alignment and cutting performance. Clean the underside of the deck to remove built-up grass, sap, and debris, which can impede airflow and create uneven cuts. Use a soft brush or a plastic scraper to avoid gouging the deck, and rinse with water if the unit is off power and completely dry before reassembly. Regular cleaning after each use helps prevent corrosion and extends the life of seals and bearings.

Deck alignment is critical for achieving an even cut. With the deck on a level surface, measure from the blade tip to the ground at the front and rear corners to ensure the deck is square. If misalignment is detected, adjust the anti-scalp wheels or links according to the manufacturer’s recommended procedure, ensuring all fasteners are torqued to the specified values. After any adjustment, perform a test cut on a small patch of grass to verify evenness and address any residual tilt. Maintaining a level deck reduces scalping and improves overall mowing performance.

Spindle and blade maintenance is essential for safe and efficient operation. Inspect spindles for play, abnormal noise, or grease leakage, and replace worn bearings or seals as necessary. Remove blades using the correct wrench pattern, noting blade orientation and any hardware specifics, then sharpen or replace the blades as a matched pair to maintain balance. When reinstalling blades, ensure the blade adapter and spindle nut are properly seated and torqued to the manufacturer’s specification. Balanced blades reduce vibration, extend spindle life, and produce a cleaner, more uniform cut.

Lubrication plays a key role in longevity, with moving parts requiring periodic greasing according to the service schedule. Apply a light film of high-temperature, multipurpose grease to spindle housings, pivots, and linkages that are documented as grease points, avoiding over-lubrication which can attract debris. If the mower uses sealed bearings, you may only need to check for lubrication at the seals or replace them if evidence of contamination appears. Regular lubrication keeps the deck components operating smoothly and reduces wear on belts and pulleys, ensuring consistent cutting performance over time.

Safety checks should accompany all maintenance tasks. Before performing any work, disconnect the spark plug and remove batteries if applicable to prevent accidental starting. Inspect the deck drive belt for cracks, fraying, or glazing, and replace it if any damage is found. Confirm that all fasteners are present and secure, including blade bolts, spindle bolts, deck mounting hardware, and anti-scalp wheels. Finally, test the mower on a level surface after maintenance to confirm stable operation and safe clearing of debris from the cutting path.

For optimal performance, establish a routine that combines deck cleaning, level alignment, spindle inspection, blade maintenance, lubrication, and safety checks after every use or at the interval recommended by the manufacturer. Keeping records of maintenance actions helps track wear patterns and predict when components should be serviced or replaced. Following these practices will help preserve cutting quality, prevent costly repairs, and extend the lifespan of the deck and cutting system.

When discrepancies persist after completing standard maintenance, consult the service manual’s torque specifications and part diagrams to verify component compatibility and assembly orientation. If any part requires replacement, use OEM components to maintain system integrity and performance. After installing new parts, perform a careful alignment and balance test, and monitor for unusual vibrations or belt wear during initial operation. Adhering to these detailed procedures yields consistent cutting results and reliable operation across the mowing season.

Additional care can include seasonal checks of the belt tension and mower deck washout ports if equipped. Ensure the washout feature, if present, is clear of obstructions and capable of properly flushing debris from the deck interior. Periodically inspect the underside for pitch changes and signs of rust or corrosion, treating any corrosion with an approved metal protector and addressing underlying moisture sources. By integrating these comprehensive steps into a maintenance routine, you sustain peak deck performance and extend the service life of the cutting system.

Note: Always follow the specific torque values, part numbers, and service procedures outlined by Craftsman for the 917.273021 model, as variances may exist between production runs. When in doubt, consult an authorized service technician to perform or supervise complex repairs, especially those involving spindle bearings, drive belts, or deck attachment hardware. Adhering to the recommended guidelines ensures safe operation and reliable mowing results.

Storage and winterization

Long term storage steps: Before placing any outdoor power equipment into long term storage, perform a thorough inspection and complete a cleaning to remove dirt, debris, and oil residues that can cause corrosion or degraded performance over time. Drain all fuels from the carburetor and fuel tank if recommended by the manufacturer, and dispose of the fuel properly in accordance with local regulations. If the equipment is to be stored with fuel in the system, add a fuel stabilizer and run the engine for several minutes to circulate stabilized fuel through the carburetor jets, then allow the engine to cool completely before storage. Remove the battery if applicable, fully charge it, and store it in a cool, dry location away from direct sunlight and metal objects that could cause discharge. Protect metal surfaces with a light coat of oil or a rust-inhibiting spray to prevent corrosion, and cover the equipment with a breathable fabric cover to minimize moisture build-up while allowing condensation to escape.

Seasonal preparation and protection: When preparing for seasonal storage, inspect all belts, pulleys, and drive components for wear and replace as necessary to prevent damage when the unit is returned to service. Check the spark plug, air filter, and fuel lines for signs of deterioration; replace these parts if they appear cracked, broken, or clogged to ensure quick starting and reliable operation after storage. Lubricate moving parts according to the manufacturer’s lubrication chart, paying close attention to pivot points, linkages, and hydraulic or gearbox housings if present. For equipment used in cold climates, ensure that cooling fins are clean and free of obstruction, and store in a location that maintains a stable temperature to avoid excess moisture formation. Finally, seal any containers or openings with appropriate caps or plugs to prevent ingress of dust, pests, or moisture during extended periods of inactivity.