CRAFTSMAN 917.254273 Service Manual

Overview of craftsman 917 254273

The Craftsman 917.254273 is a compact, gasoline-powered outdoor power machine designed for tasks such as mowing, mulching, and light yard maintenance. As a maintenance and repair specialist, I recognize the importance of understanding the machine’s layout, common wear points, and protective systems to ensure safe operation and reliable performance. This overview provides practical context for technicians and seasoned users who are preparing to service or inspect the unit. A thorough familiarity with the model’s engine, deck, and drive components helps prevent avoidable downtime and extends the lifespan of critical parts. Emphasis is placed on verifying that safety features are intact and that all control linkages respond directly and predictably under load.

Key construction features include a Briggs & Stratton or compatible engine, a rigid chassis, and a drive system designed for fidelity under typical residential use. The fuel system, air intake, and cooling passages must be inspected regularly for signs of residue, leaks, or blockages that could compromise performance. Electrical and ignition components should be checked for corrosion, loose connections, and proper grounding. By aligning the service approach with the original equipment design, technicians can accurately diagnose issues without introducing unintended wear or documentation gaps. This section emphasizes safety-first procedures, ensuring that lockout-tagout practices and proper depressurization are followed before any disassembly begins.

Within the 917.254273, routine maintenance hinges on regular inspection and timely replacement of consumables such as air filters, spark plugs, and fuel filters. The service manual specifies periodic intervals based on hours of operation and environmental conditions, which helps technicians schedule upkeep without interrupting user productivity. Accurate record keeping is essential for tracing maintenance history, identifying recurring faults, and planning future parts purchases. Tools commonly required include a spark plug wrench, torque wrench, socket set, and a multimeter for electrical checks. Understanding the correct torque specifications and reassembly sequences minimizes the risk of overtightening fasteners or compromising gasket integrity.

Safety information and warnings encompass personal protective equipment, proper fuel handling, and the identification of hot surfaces and rotating components. Operators should be trained to shut off the engine before performing any adjustments, and to disconnect the spark plug wire when working near the carburetor to prevent accidental starts. The machine’s mowing deck, blade spindle, and drive mechanisms pose pinch and cut hazards; guarding and proper blade torque verification are critical during maintenance and blade replacement. In addition, environmental considerations such as proper fuel storage, spill containment, and disposal of used oil and filters are essential practices for responsible servicing. Adhering to these guidelines not only protects the technician but also maintains the machine’s warranty status and long-term reliability.

Maintenance scheduling and record keeping require a disciplined approach to logging each service action. A recommended practice is to record the date, hours of operation, parts replaced, and any observed anomalies in a dedicated maintenance log or digital checklist. This history supports trend analysis, enabling proactive replacements before failures occur. The scheduling plan should align with seasonal use patterns; for example, more frequent checks may be needed at the start of mowing seasons or in dusty, sandy environments. Keeping receipts and invoices for parts and consumables also assists in warranty claims and future resale value, while a well-maintained log provides a clear ownership trail for service technicians who may inherit the machine. Regular reviews of the maintenance record help ensure that no critical item, such as the blade balance or belt tension, is overlooked during routine service.

Specifications and components

The engine and fuel system of the CRAFTSMAN 917.254273 are designed to deliver reliable power while maintaining efficiency and ease of maintenance. This section provides a practical overview of the core specifications, typical fuel requirements, and key system interactions that influence performance. Emphasis is placed on understanding serviceable components, normal operating ranges, and routine maintenance tasks that keep the powertrain responsive and fuel-efficient. Expect to encounter information on displacement, torque characteristics, carburetion or fuel injection configuration, and the ignition system as they relate to starting reliability and overall engine life. Regular inspection of fuel lines, clamps, and the fuel filter helps prevent air leaks and fuel contamination that can compromise performance and safety.

The electrical system in this model supports essential functions such as starting, charging, and accessory operation. A clear grasp of voltage, current flow, and circuit protection enables accurate troubleshooting and reduces the risk of component damage during maintenance. This overview details the battery specifications, charging system behavior, and key fusing schemes you are likely to encounter. It also describes common failure modes such as weak cranking, dim lights, or blown fuses, and provides recommended diagnostic procedures to isolate faults efficiently. Proper grounding, corrosion prevention, and connector integrity are highlighted to minimize intermittent electrical issues in varying environmental conditions.

The deck and drive system are engineered to deliver stable cutting performance and reliable propulsion across typical yard conditions. Critical aspects include blade type and engagement, spindle assembly, belt routing, and deck leveling procedures that impact cut quality and safety. The drive system overview covers transmission or hydrostatic components, drive belts, and wheel or track assemblies, with notes on tensioning, alignment, and wear indicators. Regular checks for belt wear, deck belt tension, pulley rotation, and mower blade balance help prevent vibration, excessive load on the engine, and uneven cutting. Attention to safety interlocks, height adjustment mechanisms, and anti-scalp features ensures consistent performance and user protection during operation and maintenance.

Replacement procedures for drive belts and pulleys begin with ensuring the engine is turned off, the spark plug wire is disconnected, and the mower is cool to prevent accidental starts or burns. Carefully tip the unit onto a stable surface or workbench to access the underside housing where the drive belt and pulleys reside. Remove any protective covers and guards, taking note of belt routing to ensure proper reinstallation. Inspect the belt for cracks, fraying, or glazing, and replace it with an OEM drive belt of the correct length and width if any damage is present. When installing a new belt, loop it around the pulleys in the exact configuration specified by the original routing, then reassemble guards and covers, performing a final tension check to confirm proper engagement and tension. After reassembly, reconnect the spark plug wire and perform a brief test to verify smooth operation of the drive system and that the belt maintains proper tension during startup and idle conditions.

Replacing cutting blades and spindle assemblies requires a disciplined approach to avoid injury and ensure balanced, effective cutting performance. Begin by disconnecting the spark plug, stabilizing the mower on a flat surface, and removing the blade bolt with the correct socket size while holding the blade to prevent rotation. Inspect the blade for nicks, cracks, or excessive wear, replacing it if any damage is evident. When installing the new blade, ensure the cutter is mounted with the correct side facing up and that the blade is oriented to match the manufacturer’s indicated rotation direction. Tighten the blade bolt to the specified torque using a torque wrench, confirming the blade remains stationary under load conditions. For spindle assemblies, remove any debris from the housing, detach the spindle retaining hardware, and lift the faulty assembly free, taking care to preserve alignment features. Install the replacement spindle, reattach the pulley, and verify that the blade spins freely without binding, then resecure all guards and test the mower to confirm smooth cutting and balanced operation.

Replacing spark plugs and ignition components is essential for reliable starting and efficient combustion. Begin by locating the spark plug and using a calibrated spark plug socket to remove it, ensuring the gap on the new plug matches the OEM specification. Inspect the ignition coil and related leads for signs of wear, corrosion, or insulation damage, replacing any compromised components to prevent weak or intermittent ignition. When installing the new spark plug, thread it by hand first to avoid cross-threading, then snug to the recommended torque without over-tightening. If an electronic ignition module or kill switch is suspected of fault, disconnect power sources and perform continuity tests or resistance checks according to the service manual, replacing components that fail within tolerance. After installation, perform a functional test by attempting a start in a safe environment, validating consistent spark, proper fuel delivery, and stable engine idle, and recheck all electrical connections for security and correct routing.

Adjustment and alignment procedures Carburetor adjustment and tuning A properly tuned carburetor is essential for reliable starting, smooth idle, and optimal fuel efficiency in the CRAFTSMAN 917.254273 mower. Begin by ensuring the engine is at standard operating temperature and that the air filter is clean and in good condition. With the shutdown switch engaged and the spark plug wire disconnected for safety, locate the carburetor screws and refer to the service decal for factory defaults. Adjust the idle speed screw first to achieve a steady, low idle without stalling; if the engine stumbles or dies, recheck for vacuum leaks or a clogged air intake. Next, adjust the high-speed and low-speed mixture screws in small increments, typically a quarter-turn at a time, while the engine is under light load. After each adjustment, allow the engine to return to a normal idle and recheck for smooth acceleration and consistent throttle response. Document the final settings and reconnect the spark plug wire, then perform a brief test run to confirm stable performance across RPM ranges. If detonation or hesitation occurs at higher throttle, inspect the fuel filter, fuel line integrity, and check for any air leaks around the intake manifold or carburetor gaskets. Mower deck level and alignment A level mower deck is critical for even cut torque distribution and consistent clipping height across the full width of the blade. Start by parking the mower on a flat, solid surface and engaging the parking brake. With the cutting blades safely immobilized, measure the distance from the blade tip to the ground at the front and rear of the deck to determine if the deck is level side-to-side and front-to-back. If discrepancies are found, adjust the deck mounting brackets or spindle shims to bring the deck to the correct plane, ensuring that all four corners match within manufacturer tolerances. After adjustments, recheck with the blades installed and rotate them by hand to confirm there is no binding or rubbing against the deck or housing. Finally, perform a test cut on a short, unobtrusive patch of lawn and verify an even height across the entire width; repeat adjustments as necessary until uniformity is achieved. Regularly inspect deck washout ports and ensure there is no buildup of grass or debris that could alter alignment between mowing sessions. Brake and throttle linkage adjustment Precise brake and throttle linkage alignment is essential for safe operation and predictable engine control. Begin by inspecting the linkage for any signs of wear, bending, or binding, and replace any worn components before proceeding with adjustments. With the engine off, connect the throttle linkage to the governor arm and ensure that the throttle plates fully close when the control lever is in the “idle” position. Adjust the idle stop to achieve a smooth idle speed without engine lugging or stalling, and verify that the brake engages when the control lever is placed in the brake position and remains engaged during a brief pull on the bail or lever. If the brake does not hold or slips, inspect the brake cable or lever for looseness, corrosion, or stretched segments, and replace or adjust as necessary. Test the full range of throttle operation, ensuring the engine accelerates smoothly to the governed speed and that the brake disengages promptly when the operator releases the brake control. Finally, recheck all mounting screws and linkage junctions for security, and apply a light coating of lubricant to moving joints to reduce friction and wear over time.

The CRAFTSMAN 917.254273 is designed for reliable starting under typical operating conditions, but a few common initiation issues can arise. If the engine does not crank, verify the battery voltage and connections first, ensuring the battery terminals are clean and tight. Check the safety interlocks and kill switch to confirm they are functioning correctly, as a faulty interlock can prevent starting even with a charged battery. If the spark plug is fouled or wet, remove and inspect it, clean or replace as needed, and re-gap to the manufacturer’s specification. Ensure the fuel system is delivering a proper fuel-air mixture; stale fuel or a clogged fuel filter can impede starting. Inconsistent starting behavior may also indicate a carburetor that needs cleaning or adjustment, particularly after long storage periods. Finally, inspect for stored electrical faults or damaged wiring harness segments that could interrupt the ignition circuit, and repair any compromised sections before attempting another start.

Electrical and charging faults can degrade performance and operational reliability. Start by measuring the battery’s resting voltage with the engine off; a healthy 12-volt battery typically reads around 12.6 volts. When cranking, voltage may dip; if it drops below the recommended threshold, test or replace the battery, and inspect for excessive parasitic draw. Inspect the alternator or charging coil for continuity and proper output; a lack of charging voltage will cause battery depletion during operation. Examine the charging system wiring for signs of wear, corrosion, or loose connectors, particularly at the stator, regulator, and battery connections. If a fuse or circuit breaker has tripped, reset or replace it after confirming that the fault is not caused by a short. In cases of intermittent charging, check for heat damage in the regulator or rectifier assembly and replace components as needed to restore stable charging performance. Finally, verify that the engine ground is solid and free of corrosion, as a poor ground can create multiple electrical faults that are difficult to diagnose.

Performance and cutting quality problems may manifest as reduced blade efficiency, uneven cuts, or excessive vibration. Begin by confirming the blade is sharp, properly balanced, and securely mounted to the arbor with the correct torque specified by the manufacturer. Inspect the blade for cracks or warping; any defect requires replacement to prevent vibration and safety hazards. Check the drive belt for wear, proper tension, and alignment; replace worn belts and adjust pulleys to restore smooth operation. Examine the spindle bearings and blade arbor for looseness or play, which can cause wobble and poor cut quality; tighten or replace components as needed. Ensure the cutting deck is clean and free of lodged grass and debris, which can impede airflow and cutting performance. If vibration persists, inspect the engine mountings and chassis for cracks or loosening hardware, and address any integrity issues. Finally, verify fuel delivery and air intake are unobstructed, as a rich or lean mixture can affect cutting performance and engine load, requiring carburetor tuning or cleaning to restore optimal performance.

Oil type and change intervals: Selecting the correct oil and adhering to proper change intervals are foundational to the longevity and performance of outdoor power equipment. For most cubic-inch engines in the Craftsman line, use a high-quality, detergent 4-stroke engine oil that meets API standards appropriate for outdoor power equipment. Always refer to the equipment’s label or user guide for the exact grade, but a common choice is SAE 30 for warmer operating conditions and 5W-30 for cooler climates. Change the oil after the first 5 hours of initial run time to flush out manufacturing residues, then follow a regular schedule based on running hours or time, typically every 25 to 50 hours of operation or at least once per season. Use a clean container to catch old oil, and replace the oil filter if your model is equipped with one, ensuring a light coating of new oil on the gasket to avoid leaks during reinstallation. After draining and replacing, run the engine briefly and recheck the oil level to confirm it is within the proper range on the dipstick.

Lubrication points and intervals: Proper lubrication reduces wear, extends component life, and maintains smooth operation. Key lubrication points include the engine crankshaft seals, throttle linkage, drive shaft joints, and cutting deck spindles, as applicable to your model. Apply a thin film of high-quality engine oil or a manufacturer-approved lubricant to pivot points and moving metal surfaces to prevent rust and seizing. For deck spindles, many units use a light machine oil on wearing surfaces and bearings; avoid over-lubricating as excess oil can attract debris and impact performance. Grease fittings, if present, should be serviced with the correct wheel-bearing or chassis grease at recommended intervals, typically every 50 hours of operation or quarterly, whichever occurs first. After lubrication, wipe away any excess residue to maintain clean operation and prevent dirt buildup that can interfere with moving parts. Regular inspection of lubrication points during each service interval will help identify wear early and prevent unexpected downtime.

Air filter and fuel filter maintenance: Clean air is essential for efficient combustion and engine life, making air filter maintenance a critical task. Inspect the air filter element regularly and replace it when it shows signs of excessive dirt, damage, or moisture; a dirty filter restricts airflow, causing rich fuel mixtures and reduced performance. For many models, the air filter housing should be opened, the element removed, and either cleaned with compressed air from the clean side outward or replaced if it is wet or deteriorated. After reinstalling a clean or new element, ensure the housing seals properly to prevent unfiltered air from bypassing the filter. The fuel filter, if equipped, should be inspected for cracks, clogs, or fuel leaks and replaced according to the manufacturer’s recommended interval, typically every season or every 100 hours of operation. When replacing filters, use the correct part number and install them securely, ensuring there are no fuel leaks at connections. Proper air and fuel filter maintenance supports reliable starts, stable idle, and consistent power output across operating conditions.

The CRAFTSMAN 917.254273 is designed to support a range of accessories and attachments that enhance lawn maintenance versatility. When selecting bagger and mulching options, verify compatibility with the specific model year and deck width to ensure proper fit and operation. Properly matched accessories maximize collection efficiency and reduce clumping or discharge issues during operation on varied grass conditions. Regular inspection of mounting points, brackets, and hardware is essential to prevent vibration, noise, and potential misalignment during use. Before installation, clean the mounting surfaces and inspect for wear or damage that could compromise attachment stability or performance.

Bagger systems typically integrate a top or side-discharge chute, a collecting bag assembly, and a discharge adaptor that routes clippings into the bags. Mulching kits, on the other hand, are designed to recirculate clippings back into the turf, producing a fine particle size that decomposes quickly. When installing any bagger or mulching option, ensure the blade set is appropriate for the chosen accessory, as incongruent blade profiles can impact cutting efficiency and the performance of the attachment. Secure all fasteners with the recommended torque values and check for clearance between the attachment and moving parts during full-range blade engagement. Periodic removal and inspection of the bagger bags for tears or leaks will help maintain consistent airflow and reduce debris loss during operation.

Attachment compatibility and installation require careful verification of the mower’s deck size, engine compatibility, and frame mounting points. Some accessories rely on a corresponding mounting hardware kit that includes brackets, washers, and shoulder bolts; using the wrong hardware can lead to異 or improper seating of the attachment. Follow the manufacturer’s recommended sequence for mounting and removing attachments to avoid undue stress on the deck or mower chassis. When installing any attachment, perform a slow, ground-level test run to confirm that the attachment does not contact the blades, pulleys, or belt covers, and listen for unusual noises that could indicate misalignment. After installation, recheck all fasteners, ensuring nothing has loosened during the initial operation or brief test run.

For optimal performance, schedule routine maintenance of attachments as part of your mowing routine. Clean all components after use to remove grass, sap, and moisture that can accelerate corrosion or wear on metal surfaces. Inspect the discharge chute, bags, and mulching blades (if applicable) for signs of wear, cracking, or deformation and replace parts that show significant damage. Keep air pathways clear in bagger systems to maintain steady airflow and prevent heat buildup in the motor housing. By following these guidelines, you can extend the life of your accessories and maintain consistent, high-quality lawn care results with the CRAFTSMAN 917.254273 mower.

The storage and winterization procedures for the CRAFTSMAN 917.254273 are essential to preserve performance and extend the life of the equipment. Proper off-season storage begins with a thorough cleaning to remove dirt, grass clippings, and chemical residues that can cause corrosion or gum up moving parts. After cleaning, inspect the unit for any signs of wear or damage, such as cracked hoses, loose fasteners, or frayed cords, and address these issues before placing the equipment into storage. Ensure all control cables operate smoothly and that the engine shutdown procedure is completed correctly, so no residual charge or pressure remains in fuel lines or the cooling system. Adequate ventilation should be maintained in the storage area to prevent moisture buildup and mold growth, which can adversely affect seals and gaskets during the next season of use. Finally, store the equipment in a dry, sheltered location away from direct sunlight to minimize UV damage to plastic components and decals. Storing fuel and batteries safely requires careful handling to prevent leaks, fires, or hazardous fumes. If the unit uses gasoline, drain the fuel or apply a fuel stabilizer according to the manufacturer’s guidelines, and run the engine briefly to ensure stabilized fuel traverses the carburetor and fuel lines before storage. Do not store the equipment with a full tank of gasoline, as this increases the risk of leaks and deterioration of the fuel over time; a partial tank is typically recommended with stabilizer added. For models with a spark plug, remove and inspect the plug; clean or replace it if dark, fouled, or worn, and apply a light coat of oil to the electrode to prevent corrosion during storage. If the machine is powered by a rechargeable battery, disconnect the battery and store it in a cool, dry place, ensuring terminals are insulated to prevent accidental short circuits. Check the battery’s charge level and follow the manufacturer’s recommendations for long-term storage, including periodic maintenance charging if required. During storage, keep all cap seals and fuel system components closed and protected from contamination to maintain readiness for the first use after winter. Winterization should also include lubrication and protective covers to guard against rust and seizing of moving parts. Apply a thin layer of lubricants to pivot points, gears, and linkage so they do not dry out in cold temperatures, and ensure that any exposed metal surfaces have a light coat of rust inhibitor if recommended for this model. Inspect the air filter and replace it if it is dirty or saturated, as a clogged filter can cause starting problems and reduced airflow when you bring the unit back into service. Drain and replace any remaining hydraulic or coolant fluids only if specified by the manufacturer, following the proper disposal guidelines for old fluids. Finally, verify that all safety devices and interlocks are functioning correctly after storage so that the machine can be operated safely when it is reassembled and reintroduced to service in the spring.