CRAFTSMAN 247.886640 Service Manual
Overview
The CRAFTSMAN 247.886640 service manual is crafted to serve as a comprehensive reference for technicians performing maintenance, diagnostics, and repair on this specific outdoor power equipment model. It provides a structured overview of the machine’s design, key components, and typical operating characteristics to establish a solid baseline for service work. This section emphasizes the importance of adhering to proper safety practices, including lockout/tagout procedures, the use of personal protective equipment, and verification of tool calibration prior to any disassembly or testing. By outlining the intended use and expected performance parameters, technicians can approach service tasks with consistent methodology and clear criteria for acceptable operation. The manual also highlights the significance of keeping manufacturer-recommended torque values, lubrication intervals, and replacement part numbers on hand to maintain reliability and safety during repairs.
The purpose of this manual is to provide precise instructions, reference data, and troubleshooting guidance necessary to diagnose faults and restore the equipment to optimal working condition. It consolidates hardware schematics, wiring diagrams, and subsystem descriptions into a single authoritative source, reducing the need to consult multiple documents. Users will find step-by-step procedures, safety cautions, and diagnostic flowcharts designed to expedite repairs while minimizing the risk of component damage or personal injury. This document is intended to be a practical, hands-on resource for professional technicians and capable DIYers who have a foundational understanding of outdoor power equipment maintenance.
Intended audience includes certified technicians, shop mechanics, and experienced enthusiasts who operate, diagnose, and repair the CRAFTSMAN 247.886640. The manual assumes familiarity with standard workshop tools, electrical testing equipment, and mechanical measurement devices. It provides detailed guidance while avoiding unnecessary theory for those who require quick, action-oriented instructions. Readers should be comfortable following torque specifications, interpreting service data, and completing required safety checks after each repair or adjustment. The content is designed to support both routine maintenance tasks and more complex corrective repairs that may arise during field or shop service.
Safety and compliance
General safety guidelines are essential when servicing and operating outdoor power equipment to prevent injury and equipment damage. Always read the manufacturer’s manual and follow the specific instructions for your model. Before performing any maintenance, disconnect the spark plug wire and remove the battery if applicable to ensure the engine cannot start unexpectedly. Use a clean, well-lit workspace with stable flooring and adequate ventilation to minimize slip, trip, and inhalation hazards. Never bypass safety interlocks or guards, and verify all guards and shields are in place after any service procedure. Keep a written service log to document inspections, replacements, and any safety concerns observed during maintenance.
Personal protective equipment should be selected to suit the task and environment. Wear cut-resistant gloves when handling sharp blades or metal parts, eye protection with side shields when grinding or tightening components, and sturdy, non-slip footwear for secure footing. Hearing protection may be necessary when running engines or using loud power tools. Use a dust mask or respirator when cutting, sanding, or working with materials that generate fine particulates. Ensure all PPE is in good condition, properly sized, and cleaned after use to maintain effective protection.
Electrical safety and shock hazards require careful attention to prevent serious injury. Verify that all electrical connections are clean, dry, and free from corrosion before performing any work. When servicing electrical components, disconnect the battery and unplug power cords from outlets, and avoid working in wet conditions. Use insulated tools and properly rated fuses or circuit breakers as specified by the manufacturer. If a damaged cord, plug, or component is found, label it as defective and replace it according to the service manual rather than attempting temporary repairs. Grounding and proper insulation are critical for safe operation of any electrically powered system.
Chemical safety and fuel handling guidelines are crucial for preventing health hazards and environmental contamination. Store fuels and solvents in approved containers away from ignition sources and in a well-ventilated area. When refueling, power down the engine and allow it to cool to prevent splashes or vapors from igniting. Use absorbent materials to contain spills and dispose of them according to local regulations. Always mix and measure fuel according to the manufacturer’s specifications, and never mix incompatible chemicals. Transport containers securely to avoid leaks, and keep fuel away from children and pets.
Tool and equipment specifications
The CRAFTSMAN 247.886640 service manual requires precise documentation of the equipment model and serial information to ensure accurate parts compatibility and service history. Record the model number, serial number, and production year from the identification plate located on the equipment frame or engine housing. Maintain a centralized log that cross-references these identifiers with the maintenance history, warranty status, and known service bulletins. When ordering parts or performing critical adjustments, verify that the serial prefix and revision level match the documented configuration for the unit. This verification helps prevent mismatches that could compromise performance or safety during operation.
Required tools and test equipment for servicing the CRAFTSMAN 247.886640 should be selected based on the maintenance task at hand and the manufacturer’s torque specifications, clearance tolerances, and safety guidelines. A metric and standard tool kit that includes open- and closed-end wrenches, a torque wrench with a calibrated range appropriate to small engine hardware, screwdrivers with insulated handles, and pliers is typically necessary. In addition, use a multimeter for electrical checks, a compression tester for engine health, an infrared thermometer for quick temperature monitoring, and a spark plug tester for ignition diagnostics. Having a clean, organized work surface, a parts tray with labeled compartments, and a magnetic parts tray helps prevent misplacement of fasteners and small components during reassembly. Always consult the service data for the correct tool sizes and calibration requirements before beginning an procedure to ensure accuracy and safety.
Safety decals and labeling play a critical role in maintaining safe operation and compliance with regulatory standards. Ensure that all decals that convey warnings, operational instructions, and safe-use guidelines remain legible and properly affixed to the machine. Replace any damaged or fading decals with OEM-approved labels sourced from the manufacturer’s parts catalog to preserve the intended color contrast and symbol visibility. Document the condition of safety labels during each service, and replace labels if the information becomes unclear or if the label has been removed during disassembly. Clear labeling of control functions, fuel and oil reservoirs, and maintenance intervals helps prevent user error and supports safer, longer-lasting operation of the equipment.
Maintenance basics
Preventive maintenance is essential to ensure reliable operation, extend the life of components, and maintain safe performance of your equipment. Establish a routine that includes visual inspections, fluid checks, and functional tests to identify wear or damage before it escalates into costly repairs. A well-documented schedule helps you track service milestones, replacements, and parts availability, reducing downtime and protecting your investment. Begin with a thorough cleaning to remove debris that can obscure issues, then proceed with checks that align to usage, operating conditions, and manufacturer recommendations. Consistency in maintenance cultivates predictable performance and helps you anticipate work that may require professional service or specialized tools.
Preventive maintenance involves several critical tasks that should be performed at regular intervals based on operating hours or calendar dates. Record the date, hours, and any observations for each maintenance activity to build a traceable history. Inspect safety features such as shields, switches, and guards to ensure they are intact and functional. Replace worn or damaged components promptly to prevent chain reactions that could compromise performance or safety. Keeping a log of service actions not only supports warranty terms but also provides valuable information for future troubleshooting and parts planning. Adhering to a structured maintenance approach promotes efficiency and reduces the risk of unexpected failures during use.
Lubrication points and intervals
Proper lubrication reduces friction, minimizes wear, and improves the efficiency of moving parts. Identify all lubrication points referenced in the service documentation and apply the recommended lubricants at the specified intervals. Use the correct grease or oil type, quantities, and application methods to avoid over- or under-lubrication, which can lead to residue buildup or insufficient protection. After lubrication, wipe away excess material to prevent dirt attraction and ensure smooth operation. Regularly check seals and fittings for signs of leakage or drying, and replace gaskets if you notice cracking or seepage. A disciplined lubrication routine contributes to longer service intervals and steadier performance under demanding workloads.
Storage and environmental considerations
When storing the equipment, choose a clean, dry, and well-ventilated area that is free of extreme temperatures and moisture. Protect exposed components from dust ingress and corrosion by covering openings or using approved protective covers. For long-term storage, drain or stabilize fuels and fluids according to the manufacturer’s guidance to prevent varnish formation and component damage. Disconnect batteries if applicable and store in a conditioned environment to preserve voltage and longevity. Periodically re-inspect stored equipment to confirm seals remain intact and that no unintended moisture or pests have compromised critical parts. Proper storage practices help preserve performance readiness and extend the lifespan of your machine between uses.
Starting and operating procedures require careful preparation to ensure safe and reliable performance. Before engaging the equipment, inspect for any visible damage, secure all guards, and verify that the fuel and lubrication systems are at proper levels. Ensure the power supply or battery connection is stable, and that you have a clear, unobstructed working area. When starting, follow the recommended sequence in the manual to avoid abrupt loads or unexpected movements. Allow the engine to reach normal operating temperature before applying full throttle or heavy loads, and always wear appropriate PPE to protect hands, eyes, and hearing. If the unit does not start within a reasonable number of attempts, perform a quick diagnostic check for fuel supply, spark if applicable, and air intake obstructions before proceeding further.
The control panel overview focuses on the layout and function of each control element to promote intuitive and safe operation. Identify the starting switch, throttle control, and any safety interlocks that prevent accidental engagement. The operator should understand how to monitor engine indicators, such as hour meters, temperature, and oil pressure, to prevent premature wear. Ensure you know the location and proper use of the choke, fast idle, and any auxiliary controls tied to accessories or implements. Regularly verify that label instructions are legible and that protective covers remain in place during operation. Understanding these controls helps minimize operator error and extend the life of the unit.
Operational limits and indicators define the boundaries within which the equipment should be used to maintain performance and safety. Never exceed the recommended RPM range or torque limits, and avoid attempting loads beyond the machine's design capabilities. Pay attention to warning lights and audible alerts, as they provide early signals of overheating, low oil levels, or other faults. When indicators show a fault condition, reduce load, pause operation, and perform a corrective check or consult the service manual before continuing. Regularly inspect and replace worn or damaged components to keep performance consistent and to prevent unsafe conditions from developing during extended use.
Diagnostics and troubleshooting
Common symptoms and causes: When a CRAFTSMAN 247.886640 unit presents with starting difficulty, intermittent operation, or unexpected shutdowns, begin by verifying fuel quality, air filter condition, and spark plug integrity. A stale or contaminated fuel supply can cause misfires, lack of power, or stalling, while a clogged air filter restricts intake and reduces engine performance. Inspect the spark plug for wear, fouling, or improper gap, as these issues often manifest as misfires or poor acceleration. Electrical symptoms such as sudden loss of power, no crank, or blown fuses may indicate battery or charging system problems, ignition switch faults, or wiring harness damage. Finally, check for mechanical restrictions, including seized components, belt slippage, or deck engagement issues that can mimic electrical faults but require different corrective actions.
Step by step diagnostic flowchart: Start with a visual inspection of all exterior components, looking for loose connections, damaged wiring, or obvious fuel leaks. Next, test the battery voltage with a multimeter to ensure it is within the recommended range, and charge or replace if necessary. Proceed to inspect the air filter, carburetor, and fuel lines for signs of dirt, varnish, or obstructions, cleaning or replacing parts as needed. If the engine cranks but does not start, verify spark by removing the spark plug, grounding it, and checking for a bright, consistent spark. If no spark is observed, inspect ignition coils, module, and kill switch wiring for continuity and proper operation. For running issues, perform a compression check if available and inspect valve timing if applicable; look for unusual noises, smoke, or excessive vibration that could indicate deeper mechanical problems. Finally, test the safety interlock system, PTO engagement, and seat switch to rule out operator presence or safety features halting operation unexpectedly.
Electrical and mechanical fault isolation: Begin with the electrical system by confirming battery condition, charging output, and all fuses. Trace the main wiring harness for breaks or chafing, particularly around the engine, ignition, and deck areas, repairing insulation and securing loose wires as needed. Use a diode tester or multimeter to verify continuity across switches, relays, and connectors, paying attention to ground paths and common return points. For mechanical fault isolation, evaluate the blade clutch, belt tensioner, and pulleys for wear, alignment, and proper tension. Inspect the mower deck spindle bearings and blades for scoring or binding, replacing worn components to restore smooth operation. If a problem persists after these checks, isolate subsystems by disconnecting nonessential circuits or components one at a time to identify the root cause, documenting each step with observed results for accurate repair records.
Repair procedures
Disassembly and reassembly overview requires a methodical approach, meticulous labeling, and a clean workspace to ensure components are reinstalled in their original positions. Begin by disconnecting power sources and draining fluids where applicable to reduce the risk of spills or accidental starts. As you remove covers and housings, document the location and orientation of each fastener, and photograph critical subassemblies to aid reassembly. Use clearly labeled containers for small parts and keep hardware grouped by subsystem to minimize confusion during the rebuild. A trusted service manual diagram is invaluable for confirming connector routes, linkage positions, and sensor locations before reassembly proceeds. Throughout disassembly, handle parts with care to avoid warping, bending, or introducing dirt into precision interfaces such as carburetor jets and ignition leads.
Carburetor and fuel system service requires careful inspection for varnish deposits, gasket integrity, and sealing surfaces. Start by removing the carburetor with the proper lift points and supporting brackets to prevent damage to the intake manifold. Inspect all diaphragms, o-rings, and gaskets for cracks or hardening, replacing them as necessary to restore airtight seals. Clean fuel passages with approved carburetor cleaners and ensure that jets and passages are free of debris before reinstalling. When reinstalling, verify that linkages move freely without sticking and that throttle and idle adjustments align with the manufacturer’s specifications. After reassembly, perform a bench test to verify proper fuel delivery and idle stability before reinstalling the assembly onto the engine.
Ignition system service focuses on coil health, spark plug condition, and wire integrity. Begin by disconnecting the spark plug boot and inspecting electrode wear, fouling, and gap size. Replace spark plugs if the electrodes are worn beyond the recommended gap or if deposits are excessive. Check ignition coils for cracks, corrosion, and proper resistance values as specified in the service data, and replace defective coils to prevent misfires. Inspect ignition timing indicators and ensure that timing marks align within tolerances, adjusting as required to maintain optimal engine performance. Reconnect all wiring with secure, corrosion-resistant connections and test for a strong, consistent spark across all cylinders, performing a functional test under load to confirm reliable starting and smooth operation.
Belt and drive system maintenance covers pulley alignment, belt condition, and tensioning. Remove the belt to inspect the pulley surfaces for wear, cracking, or glazing, and replace belts showing signs of fraying, cracking, or glazing. Align belt pulleys precisely to prevent excessive wear and vibration, and adjust belt tension per the manufacturer’s specified range to balance driveline efficiency with component longevity. Inspect drive grips, spindles, and bearings for play or noise, replacing worn components to avoid belt slippage or loss of drive. Reinstall the belt with correct routing, ensuring the belt sits in the pulley grooves without twists. After reassembly, run the engine briefly to observe belt tracking and listen for unusual noises that could indicate misalignment or bearing issues.
Cooling system maintenance and service encompasses inspection of cooling fins, shrouds, and fan assemblies to prevent overheating. Begin by removing debris from fins and ensuring unobstructed airflow around the engine and cooling passages. Check hoses for cracks, bulges, or hardening, and replace any compromised hoses to prevent leaks. Inspect the radiator or cooling coil for signs of blockage or sediment buildup, flushing the system with an appropriate coolant and replacing it according to the service schedule. Verify that the thermostat and radiator cap (if applicable) maintain correct pressure and opening temperatures, replacing faulty parts as needed. After servicing, reassemble all components with attention to torque specifications on fasteners and confirm there are no coolant leaks or loose connections during a test run.
Identifying replacement parts is a critical first step in any maintenance or repair task. Begin by locating the model number and serial number on the equipment to ensure compatibility with the correct parts catalog. Refer to the original equipment manufacturer (OEM) diagrams to confirm the exact part numbers and their orientation within the assembly. Handle all parts with care, labeling fasteners and small components to prevent mix-ups during reassembly. When in doubt, compare the suspected replacement with the existing part for identical dimensions, mounting holes, and connector types before ordering. Maintaining an organized workspace will help you track parts through disassembly, inspection, and reinstallation, reducing the risk of mistakes that could impact performance or safety.
Genuine parts versus aftermarket components is a decision that impacts performance, warranty coverage, and long-term reliability. Genuine parts are designed and tested by the original equipment manufacturer to meet exact specifications, ensuring fit and function without modification. Aftermarket parts can offer cost savings, but may vary in quality, durability, and compatibility. It is important to evaluate supplier credibility, return policies, and any available technical documentation when choosing aftermarket options. If a part is critical to safety or engine performance, prioritizing OEM parts is generally the safer approach. Always verify part numbers against the manufacturer’s listings to avoid installing incorrect or incompatible items.
Figure and parts listing overview aids in quickly identifying what you need during a service procedure. Start with a high-level schematic to grasp the assembly relationships, then drill down to individual subassemblies for detailed component views. Use the provided figure references to locate each part in the actual device, noting any match marks or color-coding used by the manufacturer. Maintain a cross-reference log that records the part number, description, quantity, and condition (new or reconditioned). This practice supports efficient ordering, reduces downtime, and improves repair traceability for future service work. Always keep a clean, legible copy of the parts listing near the workbench for rapid reference during reassembly.
When selecting replacement parts, assess wear patterns and service life in the context of the machine’s typical operating conditions. Inspect related components for signs of damage or cascading wear that could affect new parts, such as misalignment, excessive vibration, or improper lubrication. Before installation, verify that fasteners, seals, and gaskets are compatible with your unit’s revision level and service history. Use appropriate torque specifications and sequence guidelines to ensure proper clamping force without distortion. After installation, perform a functional check that confirms proper alignment, operation, and safety interlocks, then monitor the system for unusual sounds or leaks during the initial run. Maintaining a proactive approach to parts inspection helps extend the life of the equipment and prevents unexpected downtime.
Adjustments and calibration of the CRAFTSMAN 247.886640 require careful attention to both the idle setting and throttle response to ensure reliable starting and smooth operation under load. Begin by inspecting the idle speed and the idle screw position on the carburetor body. With the engine warm, set the throttle to idle and verify that the engine settles into a steady, low-rpm state without stalling. If the engine hunts or stalls, adjust the idle screw in small increments, then recheck the throttle linkage for any binding or excessive slack. After achieving a stable idle, verify that the engine responds promptly to throttle input without noticeable lag, which indicates an appropriate throttle micro-adjustment has been made. Always re-check the idle in neutral and under light load to confirm that the calibration remains consistent across typical operating conditions.
Carburetor tuning requires a methodical approach to balance air and fuel for optimal performance. Start with clean, dry air passageways and a known-good fuel sample to avoid contamination that can skew fuel metering. Use the specified settings as a baseline, then make incremental adjustments to the high-speed screw and mid-range needle as needed, listening for smooth acceleration and stable running without popping or backfiring. When tuning, work in short sessions and allow the engine to cool between adjustments to prevent heat-related changes in carburetor behavior. Document each change and its effect on idle, throttle response, and power delivery to build a reliable reference for future maintenance. In environments with variable altitude or temperature, remember that air density changes can affect performance, requiring small, repeatable tweaks to maintain consistent operation.
Safety switch and interlock adjustments are crucial for ensuring operator protection during use. Inspect all safety interlocks per the manufacturer’s recommendations and verify that the stop switch engages promptly when the operator presence control is released. If the interlock fails to deactivate or properly disable starting, test the wiring harness continuity and the lever mechanisms for wear or misalignment, and repair or replace components as necessary. Confirm that the throttle interlock returns to the idle position when released and that the engine cannot be started with the safety switches in an unsafe state. Periodically test the entire safety circuit under load conditions to ensure that all interlocks maintain functional integrity throughout the full range of motion. Proper calibration of safety interlocks not only protects the operator but also helps preserve the machine’s reliability during routine maintenance and long-term use.
The warranty coverage overview for the Craftsman 247.886640 typically outlines the scope of protection provided by the manufacturer and the authorized service network. It commonly includes the duration of coverage, the conditions under which coverage applies, and any limitations or exclusions that could affect claims. Understanding these components helps you determine whether a repair or replacement is eligible without incurring out-of-pocket costs. It is important to retain all proof of purchase and to follow prescribed usage guidelines to avoid inadvertently voiding the warranty. Regular inspections and adherence to recommended maintenance schedules often support the longevity of the equipment and uphold warranty status throughout the coverage period.
Within the warranty framework, the manufacturer may specify which components are covered versus those considered wear items. Critical powertrain or structural components might receive longer protection, while consumables such as filters, blades, and belts may be subject to wear and tear exclusions. The process for initiating a warranty claim typically involves contacting an authorized service center, providing model and serial numbers, and presenting a copy of the original purchase receipt. In some cases, the service provider may perform diagnostic testing to determine whether the issue is covered under warranty or falls under routine maintenance or misuse. Keeping a clear record of service history can streamline claim processing and help ensure that covered repairs are completed promptly.
Service documentation requirements address how repairs and maintenance should be recorded to maintain warranty validity. Technicians may be required to document the specific symptom, diagnostic steps, parts used, and labor time with proper signatures. For home users, it is often recommended to follow manufacturer-approved service manuals and to employ certified technicians for any significant work. Proper annotation of parts and serial numbers helps prevent misapplication of warranty claims and ensures traceability for future service. Maintaining a detailed service log fosters transparency and can support resale value by proving ongoing maintenance according to specification.
Disposal and recycling guidelines emphasize environmentally responsible handling of old or nonfunctional equipment. Many jurisdictions require proper separation of hazardous materials and promotion of recycling streams. The manual might outline steps for safely disconnecting power sources, draining fluids, and preparing parts for recycling with approved facilities. Adhering to these guidelines protects users and the environment while aligning with regulatory requirements. By following preferred disposal practices, customers can avoid sanctions and contribute to a sustainable lifecycle for power equipment.
Overall, understanding warranty and service information helps users optimize uptime and protect investment in the Craftsman 247.886640. Following documented procedures for claims, maintenance, and disposal ensures compliance with terms and supports effective, efficient repairs. Regular engagement with authorized service providers and careful recordkeeping reduce downtime and maximize the longevity of the equipment. Staying informed about the exact scope of coverage and required documentation enables smoother interactions with service representatives when issues arise.