CRAFTSMAN 247.881731 Service Manual
Overview and safety considerations
Before performing any maintenance or repair on the CRAFTSMAN 247.881731, carefully review all safety guidelines and ensure you have a clear, well-lit workspace. This unit incorporates moving parts, sharp edges, and potentially hazardous fluids that can cause injury if mishandled. Always disconnect the spark plug wire and remove the battery or power source if applicable to prevent accidental starts during service. Verify that the equipment is on a stable surface and that ancillary tools are within reach to minimize the need for repositioning the machine while working.
Personal protective equipment is essential when servicing this mower. Wear cut-resistant gloves to protect your hands from blades and sharp edges, and use eye protection to shield against debris. Depending on the task, hearing protection and a dust mask may also be warranted to reduce exposure to loud noises and airborne particles. Keep children and pets away from the work area, and never service the machine in a wet or damp environment to avoid electrical hazards or slippage. If you encounter fuel leaks, handle them with caution and dispose of fuel-soaked rags in accordance with local regulations.
Required tools and equipment
A well-outfitted maintenance kit is essential for efficient service of the CRAFTSMAN 247.881731. Have a complete set of metric and SAE hand tools, including wrenches, sockets, screwdrivers, pliers, and a torque wrench to ensure fasteners are tightened to specification. A multimeter may be required for electrical checks, while a suitable gas or oil drain pan helps manage fluids cleanly without spilling. Depending on the task, you might also need an air compressor or pen-style lubricant applicator to remove moisture and apply lubricants accurately to bearings and linkage points. Gather a battery charger compatible with the model’s battery system if electrification or charging is part of your service workflow.
Specialized items such as a blade sharpener or replacement blades, carburetor cleaning spray, gasket sets, and fuel system stabilizers should be kept on hand for routine maintenance and common repairs. For engine work, have a spark plug wrench, fuel line clamps, and a service manual specific to the 247.881731 to consult the correct torque specs and adjustment procedures. A magnetic pickup tool, screw organizers, and a labeling pen help maintain organization during disassembly and reassembly, reducing the risk of misplacing small components. Finally, ensure you have a clean, dry work surface and access to adequate lighting to inspect ignition, cooling fins, and drive belts thoroughly during inspection and service.
General specifications and model overview
The CRAFTSMAN 247.881731 is a compact, user-focused lawn and outdoor power equipment model designed for household maintenance tasks. It combines a reliable powertrain with a practical drive system to deliver steady performance across typical lawn care applications. The engine and drive components are laid out to prioritize ease of access for routine maintenance, such as filter servicing, oil changes, and belt inspections. This model emphasizes safety features and straightforward controls to help operators achieve consistent results with minimal setup. Overall construction prioritizes durability, with corrosion-resistant fasteners and rugged casings that withstand outdoor conditions.
Engine and drive system components are chosen to balance power, efficiency, and noise considerations. The engine typically provides ample torque for mowing and light towing tasks, while the drive system offers predictable traction on varied terrains. The transmission and belts are designed for smooth acceleration and reliable engagement, reducing the likelihood of sudden stops or jerky movements during operation. Regular inspection of pulleys, bearings, and drive belts is recommended to maintain optimal performance and prolong service life. Proper lubrication and ventilation are essential to prevent overheating and extend engine longevity during prolonged use.
Electrical system overview
The electrical system on the CRAFTSMAN 247.881731 consists of a compact control module, wiring harnesses, safety interlocks, and charging provisions that support accessory components. The control module manages operator presence, blade engagement, and speed regulation, ensuring that all safety protocols function correctly during operation. Wiring harness routing is designed to minimize exposure to moisture and debris, with protective conduits and strain reliefs to prevent conductor fatigue. The safety interlocks are integrated to require deliberate operator actions before starting or engaging equipment functions, reducing the risk of unintended operation. Battery and charging systems, if present, are sized to support starting reliability and accessory operations without significant drain during typical use.
Electrical maintenance should focus on inspecting for corrosion at terminal connections, securing loose connectors, and verifying continuity across critical safety circuits. Regularly check fuses, protective earth, and weatherproofing seals to guard against moisture ingress. When servicing the electrical system, disconnect power sources before performing any harness work to avoid accidental activation of components. Documentation of wire routing and component locations aids in future troubleshooting and ensures that replacements align with original specifications. Overall, a well-maintained electrical system contributes to safer operation, longer component life, and consistent performance across mowing seasons.
Removing external panels is the first critical step in accessing the internal working components of the CRAFTSMAN 247.881731. Begin by disconnecting any power source and ensuring the unit is on a stable, non-slip surface to prevent movement during disassembly. Use the appropriate size screwdriver to remove the fasteners securing the exterior panels, keeping track of each screw type and its original location to simplify reassembly. Gently pry the panels away from the main housing using a plastic inspection tool to avoid scratching or bending the mating surfaces. As you remove each panel, inspect the mounting clips and gaskets for signs of wear or damage, which can indicate degraded sealing or mounting issues that may affect performance. Place the panels in a labeled tray to maintain organization and reduce the risk of losing parts during the inspection process.
With the exterior removed, proceed to inspect the internal enclosures for obvious signs of trouble, such as corrosion, loose wires, or frayed insulation. Check the wiring harness connectors for secure engagement and verify that there are no exposed conductors or pinched cables that could cause shorts or intermittent operation. Inspect the cooling fins and blower housing for dust buildup, ensuring that airflow is unobstructed to maintain proper operating temperatures. Look for oil leaks or fuel residue around the engine and carburetor areas, as these can indicate seal failures or improper venting. Document any discrepancies with clear notes and photos to facilitate parts replacement and service recommendations when needed.
Inspecting key components requires a methodical approach to avoid missing critical wear items. Start with the spark plug and ignition system, ensuring the plug gap is within specification and the plug is free of excessive carbon buildup. Examine the air filter for cleanliness and integrity; a clogged filter can reduce engine efficiency and cause overheating. Inspect the fuel system for leaked lines, clamps, and fittings, replacing any suspect hoses and securing clamps to manufacturer torque specifications. Check the carburetor for varnish deposits or fuel starvation symptoms, and plan for cleaning or rebuilding if performance issues are evident. Finally, assess the belt, pulleys, and drive mechanisms for signs of cracking, misalignment, or wear that could lead to reduced efficiency or sudden downtime, and replace worn items according to the manufacturer’s guidelines.
Common wear parts in the CRAFTSMAN 247.881731 require periodic inspection to maintain performance and safety. These parts typically include belts, fuel filters, air filters, spark plugs, gaskets, seals, and drive tires or rollers depending on the model configuration. Regular wear part assessment should align with the operating hours and conditions the equipment experiences. When a component shows signs of cracking, excessive wear, or loss of performance, replace it promptly to prevent secondary damage to the engine, drive system, or cutting attachments. It is important to use OEM or manufacturer-approved equivalents to ensure proper fitment, torque specifications, and material compatibility with the engine and transmission systems. Document each replacement with the date, hours of operation, and part numbers to support maintenance history and future service planning.
Where to obtain legitimate parts and service tools requires careful selection of reputable sources. Authorized dealers and the manufacturer’s service network provide parts that meet original specifications and are accompanied by proper warranty coverage and technical bulletins. When ordering, verify the exact model and serial number to ensure compatibility with your unit, as variations between production runs can affect part fitment.For tools, prefer OEM service tools or high-quality equivalents that are guaranteed to fit the equipment’s lubrication points, fasteners, and sensor interfaces. Maintaining a record of part sources and tool purchases helps with future maintenance scheduling and reduces the risk of installing improper components. Always request a written parts diagram or exploded view from the supplier to confirm part numbers before finalizing the purchase, and keep the documentation with your maintenance log for quick reference during future repairs.
The lubrication and maintenance routines for the CRAFTSMAN 247.881731 require a disciplined approach to ensure reliable performance and extended life of the outdoor power equipment. Begin with a thorough inspection of all moving parts to identify any signs of wear, corrosion, or leaking fluids before applying lubricants. Use the recommended lubricants and adhere to the specified intervals to prevent excessive wear, reduce friction, and maintain smooth operation during cutting, mulching, or soil tasks. Maintain a clean workspace and wear appropriate PPE when handling oils, greases, and solvents to protect skin and eyes from contact and splashes. Establish a routine that aligns with your operating conditions, such as dust exposure, humidity, and frequent use, to tailor lubrication frequency and type accordingly. Keep a detailed log of maintenance activities so you can predict future needs and avoid missed service windows that could compromise performance.
The lubrication chart and intervals provide precise guidance for keeping the engine, drive system, and chassis components properly lubricated. Consult the chart to determine which components require periodic lubrication, the correct lubricant type, and the exact interval based on hours of operation or calendar time. For example, bearings, bushings, and pivot points typically benefit from light lubrication at shorter intervals, while gearbox and drive train assemblies may require more comprehensive work with top-grade lubricants. When applying lubricants, disassemble only as necessary and reassemble with correct torque specifications to preserve seals and avoid contamination. After lubrication, wipe away any excess material to prevent dirt accumulation that can attract debris and cause abrasion. Regularly verify fluid levels and condition, replacing seals or gaskets if there are signs of seepage or deterioration.
Cleaning and corrosion prevention steps are essential to maintain performance and safety between uses. Begin by removing loose debris, dust, and grass clippings from around the engine cooling fins, air intake, and exhaust, as restricted airflow can cause overheating and reduced efficiency. Use a soft brush and a mild degreaser to remove built-up grime from drive pulleys, linkages, and linkage pins, ensuring that moving parts remain unmarred by abrasive residues. Apply a corrosion-inhibiting spray or light oil to exposed metal surfaces after cleaning to slow oxidation and inhibit rust formation, especially in high-humidity or coastal environments. Store equipment in a dry, sheltered location and cover exposed fasteners with a thin film of protective lubricant to reduce moisture retention. Periodically inspect electrical connections for corrosion and apply dielectric grease where appropriate to maintain reliable starting and sensor performance.
Symptom to possible causes: When a CRAFTSMAN 247.881731 experiences starting difficulties, fatigue under load, or unexpected shutdowns, several core culprits should be considered. Common causes include ignition system failures such as a faulty spark plug, marginal ignition timing, or a damaged high-tension lead. Carburetion issues like clogged jets, stale fuel, or a dirty carburetor throat can cause erratic performance or stalling. Electrical problems, including weak battery charge, corroded connections, or blown fuses, can manifest as no-start or intermittent operation. Mechanical wear, such as a stretched belt, worn bearings, or a degraded drive clutch, may produce unusual sounds, reduced power, or belt slip under load. Additionally, air leaks in the intake manifold or vacuum lines can create lean running conditions, leading to rough idle and poor acceleration. Environmental factors, including fuel quality and improper ethanol content, can influence combustion efficiency and overall performance as well. In some cases, sensor or control module faults can mimic simple mechanical issues, especially on newer models with electronic governors or fuel injection controls.
Diagnostic steps and test procedures: Begin with the simplest checks to establish a baseline. Inspect the battery for proper voltage and clean, tight terminals; charge or replace as needed and verify the starter engages with a proper cranking speed. Remove and inspect the spark plug for fouling, proper gap, and electrode wear; replace if necessary and confirm a strong spark with a spark test. If ignition appears sound, perform a fuel system check by draining a small amount of fuel and inspecting for contamination or varnish; replace the fuel filter if equipped, and ensure fuel lines are clear of restrictions. For carbureted models, clean orifice jets and throttle passages using recommended solvents and a low-pressure spray while avoiding any damage to diaphragm components. If nuisance stalling occurs, inspect the air filter for clogging and replace if dirty, ensuring the air intake is free of obstructions. Check vacuum lines and gaskets for cracks, loose connections, or leaks that could create a lean condition; use a propane or carburetor spray test to pinpoint leaks safely. When problems persist, perform a compression test to assess engine health, noting low compression in one or more cylinders which would indicate ring, valve, or head gasket issues. For mechanical drive components, inspect the belt or drive chain tension, tensioner, and pulleys for wear or misalignment, rectifying any slack or damage. Finally, if electronic control or sensor faults are suspected, consult the service manual's wiring diagrams and use a diagnostic scan tool compatible with the model to read fault codes and clear them after repairs are completed.
Adjustments and calibrations
Carburetion and fuel system adjustments are essential for achieving consistent performance and fuel efficiency in the CRAFTSMAN 247.881731. Begin by inspecting the carburetor for any signs of buildup, wear, or air leaks around gaskets and seals. With the engine cool, disconnect the spark plug wire and remove the air filter to access the carburetor. Use a clean, non-murring tool to check for proper idle speed and mixture settings, paying close attention to the idle screw, high-speed screw, and any optional mixture screws specified by the manufacturer. After making incremental adjustments, reattach the air filter and reconnect the spark plug wire, then start the engine and observe RPM stability and smoothness of throttle response. Document any deviations from factory specifications and perform final tuning with the engine under load to ensure stable operation under typical working conditions.
During carburetor calibration, ensure the fuel system is free of obstructions and leaks. Inspect the fuel line for cracks or deterioration and replace as necessary, and verify that the fuel filter is clean and properly seated. If the unit exhibits hard starting or flooding, inspect the fuel pump (if equipped) and check for proper pressure within the ranges specified in the service data. When adjusting, use only the recommended tools and avoid forcing screws beyond their seats, which can cause internal damage. After calibration, run the engine through a complete range of speeds to verify that the mixture remains stable from idle to full throttle, and confirm that emissions and exhaust are within acceptable limits as defined by the manual.
Electrical and safety interlocks adjustments are critical for safe operation and reliable starting. Begin by inspecting all wiring harness connections for corrosion, looseness, or damaged insulation, and reseat or replace components as needed. Check the operation of safety interlocks, such as blade, brake, and seat switches, by attempting to start the engine with each interlock disengaged to confirm that the unit will not operate without the appropriate protections in place. If an interlock does not behave correctly, locate the corresponding switch, inspect its mounting, and test continuity with a multimeter, ensuring that resistance values align with service data. Perform voltage checks on the ignition system, including the spark coil and kill switch, to guarantee consistent spark delivery and proper shutoff function. Finally, reset any tripped circuit breakers or fuses and verify that all electrical connections are clean and secure, then perform a full functional test to confirm that all safety features respond as designed during operation.
Following calibration procedures, conduct a comprehensive functional test to confirm that all adjustments remain within the manufacturer’s specifications under normal operating conditions. This includes checking idle stability, throttle response, cutting or engagement mechanisms, and safety interlocks under simulated load. If any parameter drifts from the documented range, recheck the related system area, repeat the adjustment, and re-test until all readings are within tolerance. Maintain a detailed log of all adjustments, including the date, the operator, tool sizes used, and the measured values, to support future maintenance and warranty compliance. Adhere strictly to environmental and safety guidelines during testing, and dispose of any fuel or oily waste according to local regulations.
Reassembly and final testing
After all subassemblies have been inspected, cleaned, and verified for proper condition, begin the reassembly process by restoring components in the reverse order of disassembly. Establish a clean, organized work area with labeled trays for fasteners and small parts to prevent loss or mix-ups. Use the manufacturer’s torque specifications and assembly order as a guide to ensure each fastener is tightened to the correct value, avoiding over-torquing which could strip threads or under-torquing which could lead to component movement. When reinstalling major assemblies, ensure all mating surfaces are free of debris and properly aligned to prevent binding or improper operation. As you reassemble, continually verify that all cables, linkages, and safety switches are routed correctly and secured to prevent interference with moving parts during operation.
For the reassembly sequence, follow the documented order precisely to guarantee correct alignment and function. Begin with foundational components that support subsequent assemblies, confirming that any seals or gaskets are seated evenly to prevent leaks. Reinstall essential drive and lubrication systems last, paying particular attention to reservoir levels and oil paths to ensure adequate lubrication from startup. After each major step, perform a brief functional check where possible to confirm that components move freely without binding and that electrical connections are secure and free of corrosion. Maintain a consistent pace and avoid rushing, since haste can lead to misalignment or compromised safety features.
During final assembly, inspect all safety devices such as guards, shields, and interlocks to confirm they engage and disengage correctly. Reconnect fuel lines or air intakes only after confirming there are no leaks or obstructions, and use appropriate sealants or gaskets as recommended by the manufacturer. When installing the control systems, verify that the operator interface responds accurately to inputs and that feedback indicators (lights, gauges) reflect the actual state of the equipment. A comprehensive pre-test inspection should be performed to catch any overlooked items, and any discrepancies should be resolved before proceeding to operational testing to minimize the risk of unsafe startup conditions.
With reassembly complete, proceed to the operational testing procedures to confirm proper function under controlled conditions. Begin with a no-load test to verify that all moving parts initiate smoothly and that there is no abnormal noise, vibration, or heat buildup. Monitor all sensor readings and interlocks during this initial test to ensure that safety systems function as designed. If any irregularities are detected, halt the test, recheck the affected subsystem, and correct the issue before continuing. Once the no-load test is satisfactory, perform a light-load test to evaluate performance under typical operating conditions, closely observing power delivery, fuel consumption, and emission indicators if applicable.
Progress to a full-load test only after successful light-load verification, ensuring that all performance parameters stay within the specified ranges and that there are no leaks or overheating conditions. During the full-load test, log data for future reference, including run times, temperatures, pressures, and any transient faults. If a fault occurs, document the symptom, isolate the potential cause, and perform a controlled shutdown before addressing the root cause. After completing operational testing, perform a final usability check by having a qualified operator run the machine through its typical tasks to confirm ease of use, responsive controls, and consistent results across multiple cycles. Conclude the process by updating maintenance records with the results of reassembly and testing, including any parts replaced, torque values used, and observed performance metrics to support traceability and future maintenance planning.
Maintaining accurate maintenance logs is essential for ensuring optimal performance and extending the service life of your CRAFTSMAN 247.881731 outdoor power equipment. Begin by recording the date of every service event, the nature of the maintenance performed, and the exact parts or consumables that were replaced. Include odometer-like readings such as engine hours or blade tip counts if applicable, along with any observed abnormalities or performance notes. Use a consistent format for each entry to facilitate quick reviews during future inspections or when diagnosing intermittent issues. Store these records in a durable, organized format, whether in a physical notebook or a dedicated maintenance log on a computer or mobile device, and backup data to prevent loss. Regularly review the logs before each seasonal use to anticipate parts wear, schedule preventive maintenance, and budget for replacements that commonly fail in similar operating conditions.
When documenting maintenance, record both routine service actions and corrective repairs separately but with cross-references to the equipment’s model and serial number. Note the specific service tasks performed, such as spark plug replacement, air filter cleaning or replacement, carburetor inspection, fuel system filtration, blade sharpening or replacement, and lubrication points. Include the exact part numbers, supplier details, and batch/lot information when possible to aid in future sourcing and to verify compatibility with the 247.881731 model. Document testing performed after service, such as idle stabilization, throttle response, choke operation, and safety interlock checks, along with the observed results. This thorough approach helps establish a transparent service history that supports reliability and informed decision-making during subsequent maintenance cycles.
Warranty considerations require careful attention to the terms specified by the manufacturer and any applicable regional warranty regulations. Retain proof of purchase, original serial number, and documentation of all authorized service performed by qualified technicians or yourself if permitted by the warranty terms. Ensure that replacement parts meet the manufacturer’s specifications and that any warranty-approved service uses approved methods and torque values. Record the date, method, and outcome of any warranty claim attempts, along with the response from the warranty provider. Adhere to required maintenance intervals and keep a copy of the warranty card or digital warranty profile accessible with the machine’s records to expedite any potential claims should a defect arise. Regularly verify that warranty coverage remains valid and that service events align with the terms to avoid inadvertent voiding of protection.