CRAFTSMAN 247.887802 Service Manual
Overview and scope
The CRAFTSMAN 247.887802 is a compact, user-serviceable power equipment platform designed for residential lawn care and light landscaping tasks. This manual section provides an overview of the machine’s intended applications, key subsystems, and the general approach to routine maintenance and inspection. It is important to understand the machine’s operating envelope, including power ratings, fuel type, and recommended service intervals, to ensure safe and reliable performance over the life of the unit. By familiarizing yourself with the core components and their interactions, you can diagnose common issues more effectively and implement preventive maintenance that minimizes downtime. The information herein supports qualified technicians and informed owners in performing inspections, adjustments, and repairs in accordance with manufacturer specifications and safety practices.
Safety information and prerequisites outlines the foundational precautions required before any service procedure. Operators must review the machine’s operator’s manual to understand kickback, blade contact, and fuel-handling hazards. Personal protective equipment such as eye protection, hearing protection, and cut-resistant gloves should be worn during all maintenance tasks. Before any disassembly, the engine should be stopped, the spark plug wire disconnected, and the battery isolated if applicable. You should also relieve all stored energy in the system, verify that the unit cannot start unexpectedly, and ensure a clean, well-lit workspace free of trip hazards. These prerequisites help prevent injuries and protect the technician from accidental engagement of moving parts or hot surfaces.
Tools and equipment required are listed to ensure maintenance tasks can be performed efficiently and correctly. A basic tool set should include metric and SAE wrenches, a socket set, screwdrivers, pliers, a torque wrench for critical fasteners, and a multimeter for electrical checks. Additional items such as a spark plug socket, carburetor synchronization tools, and a gap gauge may be necessary for specific service procedures. A clean drain pan, approved lubricants, fuel stabilizers, and cleaning supplies are recommended for routine maintenance. For safety and accuracy, use manufacturer-specified parts and consumables, and store tools in a organized manner to prevent loss or misplacement during complex repair sequences.
In all procedures, verify the engine stop switch and ignition circuitry function correctly before reassembly. Check for fuel leaks, loose connections, and unusual wear patterns on belts and pulleys. Document any abnormal findings with notes and, if needed, photograph the condition for future reference. After completing maintenance, perform a functional test in a controlled area, ensuring all guards and safety devices are reinstalled and secure. Proper documentation and careful reassembly are essential to maintain the machine’s warranty coverage and to guarantee user safety during operation.
Electrical and control systems
The electrical and control systems of the CRAFTSMAN 247.887802 are designed to deliver reliable operation under varying load conditions while maintaining safety for the operator. Begin with a thorough visual inspection of all wiring harnesses, connectors, and relay modules to identify any signs of wear, fraying, or corrosion. Ensure that ground connections are clean and securely fastened, as a poor ground can lead to erratic behavior in the control circuitry and potential safety hazards. When working with electrical components, always disconnect the power source and discharge any stored energy in capacitors before handling to prevent accidental shock or damage to sensitive electronics. Documentation and labeling of wire routes help in maintaining consistency during service and reduce the risk of incorrect reconnections after maintenance.
Wiring diagrams and safety procedures are essential references for diagnosing electrical faults and planning repairs. Create a clean work environment, free of moisture and conductive debris, to prevent short circuits during testing. Use a digital multimeter to verify continuity, resistance, and voltage levels across harnesses, relays, and switchgear according to the manufacturer’s specifications. When testing under load, observe safe operating procedures, including the use of insulated tools and appropriate PPE. Any modification to wiring should be documented, and only OEM-approved replacements should be used to maintain system integrity and warranty coverage.
In wiring diagrams, pay close attention to the ignition control, safety interlock circuits, and the seat/handlebar switch assemblies, as these components commonly contribute to non-start conditions or intermittent faults. Inspect fuses and circuit breakers for signs of nuisance trips or discoloration, which indicate overheating or an overload condition. If a fault is suspected but not immediately evident, perform a systematic power-down and re-energize sequence to isolate the affected section without risking damage to other subsystems. Protective relays, diodes, and transient suppressors should be checked for proper operation, as failures in these components can lead to voltage spikes and erratic behavior in the control module.
Troubleshooting common electrical faults requires a methodical approach that combines visual inspection with electrical testing. Start with verifying battery health and connections, since a weak or sulfated battery can masquerade as a control fault. Check for blown fuses, damaged wiring insulation, and loose connectors, which are frequent culprits in intermittent performance issues. If the equipment fails to start, confirm that safety interlocks are functioning correctly by simulating operator conditions and observing the system response. When diagnosing control module issues, inspect the reset procedures and any diagnostic codes displayed by the controller, cross-referencing them with the service manual’s fault code table. Recurrent faults after replacement components should prompt a re-evaluation of harness routing and connector mating surfaces to rule out hidden damage or incorrect alignment.
Engine and fuel system management for the CRAFTSMAN 247.887802 requires a methodical approach to ensure reliable operation and extended service life. Begin with a thorough fuel system inspection, checking all lines, clamps, and connections for signs of wear, cracking, or leaks. Inspect the fuel shutoff valve and fuel filter for blockages or contamination, replacing filters per the manufacturer’s recommended intervals. When evaluating fuel quality, verify that the ethanol content is appropriate for small engines and use fresh, clean gasoline with the correct octane rating. If you discover varnish, gum, or sediment in the fuel system, perform a complete fuel system cleaning and replace any degraded components to prevent poor performance or stalling. Always drain old fuel from the tank if it has been stored for extended periods and dispose of it according to local regulations.
Air intake and filtration play a pivotal role in maintaining optimal engine performance and longevity. Remove the air cleaner housing and inspect the air filter media for dirt, oil saturation, or structural damage. Replace disposable filters if they are dirty or damaged, and clean reusable filters according to the manufacturer’s instructions, ensuring no debris enters the carburetor. Check the air intake pathways for obstructions, including grass clippings or insect nests, and clear them carefully. A properly sealed air filter helps maintain correct fuel-to-air ratios, improves starting, and reduces wear on the piston and rings. After servicing, confirm that the air intake seals are intact and that the housing clamps securely hold the filter in place.
Exhaust and emission considerations require attention to ensure compliance with performance standards and to minimize emissions. Inspect the muffler for cracks, holes, or loose mounting bolts, and replace or repair as needed to prevent exhaust leaks and noise issues. Examine the exhaust spark arrestor screen if applicable, cleaning or replacing it to maintain proper back-pressure and efficient combustion. Check for loose or damaged gaskets and replace them to avoid exhaust leaks that can affect engine performance. When adjusting idle speed and mixture, follow the factory specifications to balance power output with acceptable exhaust emissions. If the engine exhibits signs of hard starting or excessive smoke, reassess fuel quality, air filtration, and exhaust restrictions as root causes before pursuing more invasive repairs.
Fuel powered tools and cold start procedures
Starting procedures for fuel powered tools require careful attention to safety, correct fuel management, and proper engine preparation. Begin by inspecting the tool for any visible damage, loose components, or fuel leaks before attempting to start. Ensure the unit is on a level surface and that the spark plug, air filter, and muffler are free of obstructions. If the tool has a primer bulb, press it the recommended number of times to enrich the fuel mixture, taking care not to flood the engine. When setting the choke for a cold start, move it according to the manufacturer’s guidelines, then gradually advance to a half-choke position as the engine begins to fire. Do not force the starter grip or crankshaft; use smooth, full strokes to avoid binding the starter and damaging internal components. If the tool fails to start after several attempts, pause to re-check fuel levels and air paths, and consider performing a quick check of the spark plug gap and cleanliness. Always disconnect the spark plug boot or remove the battery (for electric-start models) before performing any inspections to avoid accidental starting.
Warm up and operation guidelines emphasize allowing the engine to reach a stable operating temperature before applying full load. After starting, gradually move the choke to the run position as the engine temperature rises, ensuring smooth acceleration without sudden throttle changes. Monitor exhaust color and engine sounds; a pale blue or gray exhaust typically indicates proper combustion, while black smoke or excessive vibration may signal an overly rich mixture or a loose component, requiring immediate inspection. When operating, maintain steady, even throttle control and avoid sustained high RPMs without a load, which can overheat the engine or wear drive components. Keep the work area clear of debris and ensure that bystanders maintain a safe distance during startup and operation. Periodically check for unusual vibrations, loose fasteners, or fuel leaks as the tool warms up, addressing issues promptly to prevent damage or unsafe conditions.
Belt and pulley systems
Belt inspection and replacement guidelines: Regular inspection of the belt system is essential for safe and efficient operation of the CRAFTSMAN 247.887802. Begin by visually checking the belt for signs of wear, such as fraying edges, cracking, glazing, or missing teeth if the belt has teeth. Pay attention to any oil or fuel contamination, which can degrade elastomer materials and reduce belt life. If glazing is present or the belt appears stretched beyond its designed tolerance, replace it promptly to maintain proper drive ratios and prevent slippage that could lead to loss of power or sudden shutdowns. When removing a worn belt, document the belt type, width, and length, and ensure the replacement matches the OEM specifications exactly to preserve performance and safety margins. After installation, manually rotate the pulley system to feel for smooth operation and to verify there is no binding or misalignment that could cause accelerated wear or noise during operation. Always use recommended replacement belts from the manufacturer to guarantee material compatibility with pulleys, bearings, and tensioners.
Tensioning and alignment procedures: Proper belt tension is critical to prevent slip, reduce wear, and maintain engine and attachment performance. Begin with the specified tension value from the service manual, and adjust using the tensioner or motor pulley as designed for the 247.887802 configuration. Check tension by deflecting the belt midway between pulleys; a consistent deflection within the OEM range indicates correct tension. Avoid over-tensioning, which can place excessive load on bearings and shorten belt life, or under-tensioning, which leads to slippage and loss of efficiency. After adjusting, recheck belt alignment by ensuring that the pulleys are co-planar and that the belt sits properly in the pulley grooves without riding on the edge. Use alignment gauges or a straight edge to verify that all belt axes are parallel and true, and observe that no pulley is bent or out of plane. When reinstalling belts after service, rotate the assembly by hand several revolutions to confirm even tension distribution and listen for abnormal noises such as chirping or squealing, which can indicate misalignment or defective components. If misalignment persists, inspect the idlers, pulleys, and mounting brackets for wear or damage and replace any worn parts to restore proper belt tracking and performance.
Structural inspection and corrosion prevention: The chassis and frame provide the foundation of the equipment’s rigidity and alignment, supporting all moving components and loads encountered during operation. Begin with a thorough visual inspection for any signs of bending, cracks, or deformations in the metalwork, paying close attention to weld seams and mounting points. Remove any surface rust using a nylon brush or non-metallic scrubbing pad, and treat exposed metal with a corrosion-inhibiting primer or protective coating to slow future oxidation. For areas that show pitting or deep corrosion, perform a more detailed assessment to determine if material loss has compromised structural integrity; replace affected sections as necessary to prevent failure during use. After cleaning and protection, recheck all attachment points for snugness and evidence of loosening, which can indicate hidden stress or misalignment. Maintain a regular inspection routine, especially after impacts or rough terrain, to ensure the chassis maintains proper geometry and operability over time.
Bolt torque specifications and fastener maintenance: Accurate bolt torque is essential to preserve frame rigidity and the dependable operation of all mounted components. Begin by consulting the equipment’s service data to confirm the exact torque values for each fastener, noting that different fasteners may require distinct torque settings based on thread size and load requirements. When tightening, use a calibrated torque wrench and follow a consistent pattern appropriate for the component, typically working in a crisscross sequence for evenly distributed loads. After installation, verify that all fasteners sit flush and show no signs of over-torquing, such as thread stripping or plating damage. Implement a periodic maintenance schedule that includes checking fastener tension at defined service intervals and after any known impacts or tip-overs; loose hardware can lead to misalignment, vibration, and accelerated wear. Replace any damaged or corroded fasteners with OEM-approved parts to maintain compatibility and safety margins, and apply a light anti-seize compound when appropriate to facilitate future service and prevent galling.
Hydraulic and cooling system care
Effective maintenance of the hydraulic and cooling systems is essential to ensure reliable operation and extended service life of the CRAFTSMAN 247.887802. Begin with a thorough visual inspection of the coolant reservoir, hoses, and clamps for signs of cracking, wear, or looseness. Check the coolant level when the engine is cold and the system is at rest to obtain an accurate reading, and note any consistent drops that could indicate leakage. Ensure that the radiator cap seats properly and seals without damage, as a faulty cap can lead to loss of pressure and overheating. Regularly clean dirt and debris from the radiator fins and surrounding area to maintain optimal airflow and cooling efficiency.
When evaluating the cooling system, pay close attention to temperature gauges and warning lights during operation. Abnormal temperature rises or erratic readings can point to restricted flow, a failing thermostat, or a failing water pump. Inspect belt tension and condition on driven pulleys, as a loose or stretched belt can reduce cooling pump performance and impact hydraulic operation. Flush the cooling system at manufacturer-recommended intervals and replace coolant with the specified type and concentration to prevent corrosion and scaling inside passages. Keep an organized record of maintenance actions, including fluid changes, for future reference and troubleshooting.
In regard to coolant maintenance, use only the coolant specified by the manufacturer and mix according to the recommended ratio. Dispose of used coolant in accordance with local regulations, and never mix incompatible fluids as this can create hazardous mixtures. Use clean receptacles and tools during service to avoid contamination of the cooling system. Monitor hoses for soft spots, bulges, or residue near hose clamps, and replace any questionable hoses promptly to prevent leaks and loss of system pressure. After completing coolant servicing, run the engine for several minutes to circulate fresh coolant and verify that there are no visible leaks at connections and fittings.
For hydraulic line inspection and leaks, begin by inspecting all visible hydraulic lines for signs of abrasion, cracking, or deformities, paying particular attention to areas near fittings and motor mounts where vibration is most pronounced. Use a flashlight to check for weeping at flare fittings and quick-connects, and gently flex lines to reveal any hidden deterioration. Any dampness, sheen, or fresh stains around fittings indicates a leak that requires immediate tightening within the specified torque range or replacement of the faulty component. Maintain proper cleanliness during inspection to prevent dirt from entering the hydraulic system, and cap or cover exposed ports when removing lines to minimize contamination. Document the location and severity of any leaks, then perform a controlled pressure test following the service manual guidelines to confirm the integrity of the hydraulic circuit.
When replacing hydraulic lines, select parts that meet the exact specifications for size, material, and connection type to ensure leak-free performance under operating pressures. Route hoses and cables away from hot surfaces and sharp edges, using protective sleeves where necessary to prevent wear. After reassembly, perform a system bleed if required to remove trapped air, observing any changes in pressure readings and ensuring smooth, consistent hydraulic motion. Finally, conduct a functional test of the entire hydraulic subsystem, including actuator response and return driving pressures, to verify there are no abnormal noises or delays and that cooling performance remains within established parameters.
Diagnostics and troubleshooting guide
The following guidance is intended for technicians working on the CRAFTSMAN 247.887802 and covers common symptoms, likely causes, and recommended checks. Begin with a calm, methodical approach to avoid overlooking intermittent faults. Document all observed conditions, including any unusual noises, smells, or behaviors, and verify that the equipment is on a stable, level surface with all safety guards in place before performing any tests. Use the manufacturer’s torque specs and tightening sequences when reassembling components to ensure proper function and avoid overtightening or loosening critical fasteners. When diagnosing, differentiate between electrical, mechanical, and fuel-related issues to streamline your fault isolation process and minimize downtime.
Symptom to diagnosis mapping is a practical starting point for rapid fault isolation. If the engine does not crank, confirm battery voltage, wiring continuity to the starter, and ignition switch operation, then inspect fuses and safety interlocks for proper engagement. If the engine turns over but won’t start, test the ignition system, check for spark, and evaluate the fuel delivery path for blockages or air leaks. For rough running or misfires, examine the spark plugs,ignition coil integrity, air filter condition, and fuel quality, while also verifying the presence of vacuum leaks in the intake tract. If the machine starts but stalls under load, assess the carburetor or fuel injection timing, examine the fuel filter, and confirm that the muffler is not restricted by carbon buildup. In cases of poor cooling or overheating, inspect the cooling fins and fan operation, verify coolant or lubrication levels if applicable, and ensure that the cooling passages are free of obstructions. Document each symptom, then proceed through the diagnostic steps in a logical order to confirm or rule out potential failures.
Electrical and mechanical fault isolation requires a careful test plan that segregates circuits and subsystems. Begin with safety-first shutdown procedures, disconnect power sources, and use a multimeter to verify supply voltages at the control module, switches, and relays. Check for signs of water intrusion, corrosion, or damaged insulation on wiring harnesses, connectors, and grounds, as poor connections can mimic more serious faults. When chasing a mechanical fault, inspect moving parts for excessive wear, seized bearings, misaligned shafts, and compromised linkages, using appropriate gauges and feeler tools to measure clearances and runout. For drive systems and cutting attachments, verify belt tension, pulley alignment, and clutch operation, ensuring that all moving components rotate freely without binding or abnormal resistance. Finally, cross-check sensor feedback and actuator responses with the service literature to confirm that the control system receives correct signals and that redundancies or safety interlocks are functioning as designed, thereby narrowing down the root cause with confidence.
Replacing common wear parts requires a systematic approach to ensure longevity and safe operation of the Craftsman 247.887802 power equipment. Begin by identifying components that are susceptible to wear, such as drive belts, spark plugs, air filters, and blade assemblies. Carefully inspect each part for cracks, fraying, distortion, or excessive wear. When removing worn parts, document their orientation and fitment to preserve proper reassembly, and replace with OEM-approved components to maintain performance and safety. Use clean, lint-free rags and appropriate solvents to remove debris without contaminating new parts. After installation, verify that each part seats correctly and that any tensioned components, such as belts or chains, are aligned per the manufacturer’s recommendations. Finally, perform a short functional test without a load to confirm smooth operation before returning the equipment to service.
Torque specs and fastener safety are critical for maintaining the structural integrity and reliability of the machine. Always torque fasteners to the values specified by the manufacturer using a calibrated torque wrench, and apply the correct torque sequence to prevent warping or uneven load distribution. Pay particular attention to blade bolts, drive pulley fasteners, and housing screws, as under-tightening can lead to vibration and component damage while over-tightening can strip threads or cause deformation. When replacing fasteners, ensure you use the correct grade and length, and replace any corroded or damaged fasteners with new ones. Apply a light coat of threadlocker only where specified by the service data, and avoid excessive lubrication on fasteners that require precise clamping force. After reassembly, re-check torque on critical fasteners after a brief run-in period as recommended, and inspect for signs of unusual movement or misalignment that might indicate an incorrect installation.
Common wear parts should be checked regularly as part of routine maintenance to prevent unexpected downtime. The air filter, for instance, should be replaced or cleaned per the operating conditions, and the carburetor should be inspected for varnish or fuel residue that can impede performance. The spark plug must be gapped to the specified interval, and the ignition system should be tested for proper firing voltage. The blade or cutter assembly should be balanced and free of nicks or dull edges, with the correct replacement type used according to the model’s specification. Lubrication points must be serviced with the recommended oil or grease, ensuring that moving parts operate smoothly without excessive resistance. By maintaining these wear parts at the correct intervals, you preserve engine efficiency, reduce fuel consumption, and extend the overall lifespan of the equipment.
Additional preventive measures involve accurate alignment and calibration of key components. Alignments such as pulley and belt tracking, or blade height and balance, play a critical role in performance and noise reduction. When performing alignment checks, use the manufacturer’s guidance and precise measurement tools to confirm proper geometry. If misalignment is detected, halt operation and correct the setup before continuing, as continued use in a misaligned state can cause accelerated wear, vibration, and potential safety risks. Document any adjustments made and re-test the system under controlled conditions to validate that the equipment runs smoothly with stable vibration levels. Regularly reviewing alignment and torque data ensures consistent performance and safe operation over time.
For a complete, dependable service, maintain a clean workspace and organize replacement parts for quick access. Keep a log of maintenance tasks, including part numbers, torque values, and replacement dates, to track wear trends and schedule proactive service. Use OEM parts whenever possible to ensure compatibility and safety, and verify that any aftermarket components meet the same exacting standards. Before returning the unit to service, perform a final functional test that simulates typical operating conditions and confirms there are no abnormal sounds or vibrations. By adhering to these detailed procedures, you can confidently manage parts replacement and maintain correct specifications for optimal performance and safety.
Safety and compliance documentation
Lockout tagout procedures are a critical part of safe maintenance for outdoor power equipment like the CRAFTSMAN 247.887802. Before performing any service, disconnect the power source and verify that all potential energy sources are isolated to prevent unexpected startup. Apply a visible lock and sturdy tag to the disconnect device, ensuring that only qualified personnel can remove them. The procedure should be documented on the maintenance log and reviewed with anyone who will perform servicing to ensure understanding of the shutdown process. Always test the machine after reassembly by attempting a controlled startup with the power source disengaged to confirm that no residual energy remains. Compliance requires adherence to the established lockout tagout sequence and the use of appropriate personal protective equipment during all steps of the procedure.
Maintenance record keeping is essential for traceability and safety auditing. Each service event should be logged with the date, technician name, equipment model, and a detailed description of the work performed. Include notes on parts replaced, measurements taken, tool calibration if applicable, and any safety concerns encountered. Retain prior maintenance entries in a chronological file to provide a history that can be reviewed during inspections or when diagnosing recurring issues. The log should also capture the results of functional checks and safety tests conducted after maintenance, along with the operator’s sign-off indicating that the equipment was tested and considered safe to return to service. Proper documentation supports warranty claims and helps ensure ongoing compliance with applicable standards and regulations.
For both lockout tagout and maintenance record keeping, establish a standardized form or template to ensure consistency across all technicians. The templates should include fields for equipment ID, service type, fault description, corrective actions, verification results, and the date of the next scheduled maintenance. Digital copies should be backed up in a secure database with restricted access to protect sensitive information while allowing authorized personnel to pull up records quickly. Regular audits of the documentation process help identify gaps and improve overall safety and reliability of the equipment used in outdoor power applications. Adhering to these documentation practices supports a safer work environment and aligns with industry best practices for equipment maintenance and compliance.