STIHL MS 360 Service Manual

Overview

The STIHL MS 360 is a professionally oriented chainsaw designed for demanding felling, cutting, and logging tasks. This section provides a concise overview of the machine’s intended use, core capabilities, and the general framework for service and maintenance. It outlines the purpose of the instrument, the typical operating environments, and the critical parameters that technicians and operators should recognize before undertaking maintenance or repair work. Understanding the MS 360’s scope helps ensure that service actions maintain performance, safety, and reliability over the entire service life of the unit. Proper orientation to the machine’s specifications and limitations reduces the risk of damage and enhances user confidence in maintenance procedures.

The MS 360 employs a robust two-stroke engine paired with STIHL’s standard chain drive system, designed for sustained workloads rather than casual, light-duty use. This overview highlights the importance of using manufacturer-approved parts, lubricants, and fuel mixtures to preserve engine longevity and performance. It also emphasizes adherence to service intervals and checks that are fundamental to safe operation in the field. By understanding the machine’s design philosophy and intended workload, technicians can prioritize preventive maintenance tasks and plan for timely replacements of wear-prone components. This approach minimizes downtime and supports consistent cutting efficiency in challenging conditions.

In practical terms, the MS 360’s maintenance regimen includes routine inspection of the air filtration system, fuel system, ignition components, and chain brake mechanisms. The overview sets the expectation that regular calibration, tension adjustments, and anti-vibration system checks are essential elements of proper care. It also introduces the concept that successful service relies on clean working conditions, correct identification of replacement parts, and adherence to torque specifications and safety procedures. By establishing these fundamentals, technicians create a reliable baseline from which more advanced servicing tasks can be performed with confidence.

Safety information and prerequisites establish the critical groundwork for all subsequent service work on the MS 360. Prior to any disassembly or adjustment, technicians should ensure that the unit is stabilized, the chain is secured, and the ignition system is isolated to prevent accidental starts. The prerequisites include verifying tool readiness, PPE requirements, and access to the manufacturer’s service documentation for torque specs and component diagrams. This section also reinforces the importance of logging maintenance activities, recording observations, and communicating findings to the equipment owner. Maintaining a clear, documented workflow helps prevent omissions and supports traceability in future service cycles.

Additionally, a thorough risk assessment is recommended to identify potential hazards associated with the MS 360’s operation, such as kickback, hot exhaust surfaces, and rotating cutting components. Technicians should confirm that proper ventilation and work area clearance are available when performing maintenance, especially in enclosed or poorly ventilated spaces. The prerequisites also cover safe handling of fuel and lubricants, including static electricity precautions and proper container usage. By addressing safety information and prerequisites comprehensively, the service process becomes safer, more predictable, and easier to audit. This foundation ensures that all subsequent maintenance steps proceed with minimized risk and maximized reliability.

Tool specifications and identification

The STIHL MS 360 is a mid-range professional chainsaw known for its robust build, balanced handling, and reliable performance in demanding forestry tasks. Its engine displacement, power output, and weight are engineered to deliver strong cutting capability without sacrificing maneuverability for longer work sessions. In operation, this model emphasizes dependable cold-weather starting, smooth throttle response, and efficient fuel consumption, which helps reduce downtime and maintenance costs on the job site. When evaluating an MS 360 for purchase or service, it is important to note its overall ergonomics, including handle design, vibration levels, and access to critical service points, as these factors influence long-term reliability and user safety. Regular inspection of the bar and chain alignment, anti-vibration mounts, and muffler condition should be part of a routine maintenance checklist to preserve performance and extend engine life.

The MS 360 is designed to accommodate common forestry tasks such as felling, bucking, and limbing, with a chain brake, safety features, and standardized filtering to protect the engine from contaminants. A clear understanding of the engine configuration, carburetion system, and air intake paths is essential for diagnosing performance issues and implementing correct tuning procedures. The bar length options and chain pitch compatibility determine cutting aggressiveness and efficiency, so technicians should verify the appropriate accessories for the specific model year and production run. In service scenarios, maintaining correct fuel-to-oil mixture ratios and using the recommended bar oil helps prevent excessive wear and reduces potential heat-related damage. Consistent care of cooling fins and exhaust systems also supports steady performance in various working environments.

Identification numbers and labeling on the STIHL MS 360 provide essential traceability for parts sourcing, warranty validation, and safe operation. The nameplate typically lists the model designation, serial number, and production code, which must be cross-referenced with official parts catalogs when ordering components. Serial numbers enable technicians to confirm the exact build configuration, including bar size, chain pitch, and muffler type, ensuring compatibility of replacement parts. On the body of the saw, labeling indicates service intervals, oiling points, and safety notices, which assist operators in following the correct maintenance routine. When inspecting the tool, concordance between the model number on the placard and the markings on the crankcase is a quick check to prevent ordering incorrect parts. If any label is unreadable or damaged, replacement decals should be sourced from authorized dealers to maintain proper identification and safety compliance.

Preventive maintenance timetable is essential for ensuring reliable operation and longevity of the STIHL MS 360 chainsaw. Establish a routine that aligns with your usage patterns, but always include a baseline service after every extended period of use and at the start of the cutting season. Begin with a thorough inspection of clutch, bar, chain, and air system to identify wear, damage, or looseness. Record the date of each service and the mileage or hours of operation since the last check to track trends and anticipate component replacements before failures occur. Maintain a clean working environment and organize your tools so you can perform tasks efficiently without skipping critical steps. A well-documented schedule helps prevent unexpected downtime and maintains safe operating conditions for the user and bystanders.

Seasonal service considerations require adjusting the maintenance emphasis to match environmental conditions and workload. In late autumn or winter, when temperatures are low and humidity is high, pay extra attention to fuel quality, carburetor idle settings, and choke operation to prevent starting difficulties. During extended storage periods, perform a complete fuel system purge, replace the primer bulb seals if necessary, and ensure the spark plug is clean and correctly gapped to facilitate a reliable restart after storage. In hot and dusty summer conditions, increase air filtration checks and verify bar groove wear, as abrasive dust accelerates chain and bar wear. Always rotate chains, lubricate bar rails, and verify chain tension to accommodate temperature-driven expansion or contraction, which can affect performance. These seasonal checks help maintain consistent cutting performance and extend engine life across varying climates.

Regular intervals should include a visual inspection of the air filter, fuel filter, and cooling fins, with a focus on removing debris that can restrict airflow and cause overheating. Check the spark plug for fouling and correct electrode spacing, cleaning or replacing as needed to ensure proper ignition. Inspect the compression and starting system components, including the recoil starter, to confirm smooth operation and to prevent hard starting. Lubrication needs should be assessed by monitoring chain oil flow and confirming the oiling system is delivering adequate lubrication to the bar and chain during operation. Establish clear maintenance milestones based on running hours and the environment, and perform any needed replacements or adjustments before performance deteriorates, ensuring safety and reliability on every job.

The STIHL MS 360 chainsaw requires careful attention during disassembly and inspection to ensure safe and reliable operation. Begin with a systematic approach, documenting each fastener and component location as you remove covers and shields. Use proper tool alignment and seating to prevent rounding screws or bending delicate parts. When removing the powerhead cover, support the bar and chain to avoid unintentional disengagement. As you proceed, keep debris-free surfaces and organize components to facilitate accurate reassembly and future maintenance checks. After completing disassembly, clean all mating surfaces and inspect for signs of wear, corrosion, or damage before proceeding to the inspection steps outlined for the chain brake, guide bar, carburetor, and fuel system.

Chain brake and guide bar inspection

Assess the chain brake system for proper engagement and function, ensuring the brake band and lever operate smoothly without sticking. Check the chain brake return spring for correct tension and verify that the brake dogs, pawls, and associated components are free of excessive wear or damage. Inspect the chain tensioner mechanism, including the tensioning screw and guide, for signs of stripping or seizure. The guide bar should show uniform wear on the rails without cupping or excessive lateral flex; look for burrs, chips, or flame-hardening wear that could indicate improper use or hard tool impacts. Examine the oiling system passages to confirm there are no blockages that could impede bar lubrication, and verify that the bar mounting hardware seats squarely against the crankcase to prevent misalignment. If the chain is seized or binding, separate the bar and chain carefully, clean the rails, and inspect the drive sprocket for hooked or broken teeth. Replace any worn chain, bar, or sprocket as indicated by excessive clearance or damaged engagement surfaces. Ensure the sprocket nose and drive shaft are clean and free of burrs to promote smooth rotation and reduce chain dwell time during operation. Document any findings and schedule replacements in accordance with STIHL service guidelines or the manufacturer’s recommendations.

Carburetor and fuel system inspection

Begin with a thorough visual inspection of the carburetor body for cracks, gaskets, and fuel inlet fittings, noting any signs of air or fuel leaks that could affect performance. Remove the carburetor only after ensuring the fuel system is depressurized and that the fuel line is safely disconnected, taking care not to damage the primer bulb or fuel hoses. Inspect the high- and low-speed jets for obstructions and verify that the metering and needle valves seat properly without leaks; clean with approved carburetor spray and compressed air in short bursts to avoid forcing debris into sensitive passages. Examine the diaphragms, gaskets, and seals for wear, tearing, or curling, replacing them if any deformation is evident. Check the idle and mixture adjustment screws for smooth operation; ensure the adjustment range is consistent with the manufacturer’s specifications and that the throttle linkage moves without binding. Verify the fuel delivery system for leaks, checking the fuel filter or screen for clogging and replacing it if necessary; inspect the fuel lines for cracks or hardening and replace any section that shows signs of aging. Reassemble with attention to the correct orientation of all parts, torquing fasteners to the specified values and confirming that the carburetor mounts squarely to prevent air leaks. After reassembly, perform a careful engine start-up procedure in a controlled environment and monitor for consistent idle, smooth acceleration, and stable operation across the appropriate RPM ranges.

Replacement parts and kits

The STIHL MS 360 is a robust mid-range chainsaw that relies on a combination of precision-fabricated components and readily available replacement parts to maintain performance and safety. When evaluating replacement parts, prioritize genuine STIHL components or equivalently rated aftermarket parts from reputable suppliers to preserve saw balance, chain stability, and overall drive performance. Regular inspection of wear items such as the bar, chain, fuel line, and air filter helps identify parts that require replacement before they fail in service. Maintaining an organized parts kit with common items like gaskets, seals, and small fasteners can significantly reduce downtime during field service. Always verify part numbers against current STIHL catalogs to ensure compatibility with your MS 360’s serial range and production year.

For routine maintenance and repairs, a well-curated replacement parts list should include items that frequently wear or degrade under normal operation. Examples include carburetor gaskets and diaphragms, primer bulb assemblies, fuel and vent filters, spark plugs, and recoil starter handles. In addition to consumables, keep spare piston rings, seals, and fuel lines on hand to address performance dips without waiting for shipping. A dedicated kit that bundles the most commonly replaced items can streamline service workflows, especially in field conditions where immediate parts availability is crucial. Practice proper stock management by rotating inventory to prevent degraded parts from sitting idle and to ensure fresh replacements for critical components.

Another essential category is safety-related parts that influence clutch engagement, chain brake function, and throttle control. Replace worn or damaged components such as the clutch springs, drum bearing, bar nuts, and chain sprockets only with parts that meet or exceed OEM specifications. Inspect and replace anti-vibration dampeners and mountings if they exhibit excessive play or cracking, as these affect operator comfort and control. When assembling replacement parts, follow torque specifications and alignment procedures meticulously to avoid premature wear or unsafe operation. Keeping a correctly sized bar and chain kit alongside engine-related parts helps ensure that the saw operates within its intended performance envelope after service.

Bar and chain components are critical for cutting efficiency and operator safety. Select bars with the correct length, groove width, and mounting hole pattern for the MS 360’s model year and bar mounting configuration. Use replacement chains that match the drive sprocket size and pitch with appropriate gauge to prevent excessive vibration, misalignment, or chain derailment. Regularly inspect the bar rails for mushrooming, excessive wear, or galling, and replace if you observe any notch wear or bending. When fitting a new bar and chain, correctly tension the chain to the recommended tightness and run the saw briefly to check for smooth engagement and proper idle operation. Maintain proper lubrication by ensuring the chain oil system is free of obstructions and that the oil flow is adequate for the bar length and cutting workload.

In addition to individual parts, consider purchasing official replacement kits that bundle commonly replaced items for the STIHL MS 360. These kits are designed to simplify logistics, reduce downtime, and ensure correct compatibility across service intervals. Always discard single-use gaskets or seals that show signs of compression or cracking and replace them with new OEM-approved components. Document part replacements in a service log, noting part numbers, date of installation, and observed operating conditions to inform future maintenance planning. By maintaining a well-organized and properly stocked replacement parts and kits program, you can sustain reliable performance, extend engine life, and enhance operator safety during demanding forestry and property maintenance tasks.

Cleaning procedures for the STIHL MS 360 begin with a thorough inspection of the exterior to identify any buildup of dirt, oil, or combustible debris that could affect cooling or operation. Use a soft brush and a mild degreasing solution to loosen grime from the chain saw body, bar rail, and coating surfaces, taking care to avoid sensitive components such as the carburetor, exhaust, and air intake. Rinse with clean water and allow the unit to dry completely in a shaded, well-ventilated area before reassembly or use. When cleaning the air filter, remove it carefully and inspect for cracks or excessive wear; replace if necessary, and ensure the intake routes are free from obstructions. For hard-to-reach areas, employ compressed air at a safe pressure from a distance that prevents damage to seals or bearings, and always follow the manufacturer’s recommendations on air pressure and frequency. After cleaning, recheck fasteners for tightness and confirm that cooling fins are clear of lint and debris to maintain optimal operating temperature.

Long term storage guidelines require a deliberate and safe approach to prevent corrosion, fuel deterioration, and deterioration of rubber components. Start by running the engine until the fuel is exhausted from the carburetor and fuel lines to minimize varnish formation inside the carburetor body. If fuel remains in the tank, add a fuel stabilizer according to the product instructions and run the engine briefly to circulate the stabilizer through the system, then store with the upper end of the fuel tank capped to limit moisture ingress. Remove the spark plug, apply a light coating of engine oil to the piston crown and cylinder walls, and rotate the crankshaft gently to distribute the oil; reinstall the spark plug with a proper gap setting to prevent corrosion and sticking. Store the saw in a dry, climate-controlled environment, ideally in a position that minimizes stress on the bar and chain and protects against accidental impact or tipping. Cover the unit with a breathable, loose-fitting cover to keep dust out while allowing airflow to prevent condensation buildup inside the engine compartment.

During storage, inspect the chain brake, clutch, and drive sprocket for corrosion or wear and lubricate as specified by STIHL’s service guidelines. Verify that the bar and chain are clean, free of nicks, and properly tensioned when stored; adjust chain tension to a safe, loose setting to prevent chain stretch and misalignment while not in use. If moisture exposure is likely, consider applying a light protective coating to metal surfaces to prevent rust and ensuring that fuel lines and gaskets are dry before sealing the unit away. Prior to return to service after a long storage period, perform a functional check including a compression test if indicated, re-torque critical fasteners, and re-map the lubrication pathways to ensure even oil distribution through the bar and chain once restarted. Document the storage conditions and maintenance performed so future technicians can quickly verify the unit’s readiness for operation.

The STIHL MS 360 chainsaw is a robust tool designed for demanding cutting tasks, but like any mechanical device it can encounter performance issues over time. Common issues often relate to fuel delivery, air intake, ignition, and exhaust systems. If the engine starts but runs rough, stalls, or loses power, inspect the fuel system first, including the carburetor, fuel lines, and the fuel filter. Dirty air can also cause poor combustion, so check and clean the air filter and intake passages to ensure unrestricted airflow. Inconsistent idle or unexpected shutdowns frequently point to ignition or fuel metering problems that require careful diagnosis and component testing. Additionally, consider chain brake function and chain lubrication as part of overall diagnostics, since improper safety or lubrication can masquerade as performance issues. Regular maintenance intervals help preempt many of these symptoms before they become critical failures.

Diagnostic steps begin with a systematic check of fuel availability and quality. Confirm the correct fuel mixture and freshness, and inspect the fuel lines for cracks, hardness, or leaks. Remove the spark plug to inspect its condition and gap; a fouled or worn plug can cause misfires and weak performance. Use a spark tester to verify consistent spark delivery under cranking conditions, and evaluate the ignition coil for signs of overheating or degradation. If compression is low, perform a compression test to determine the integrity of the cylinder, piston, and rings; low compression often indicates internal wear or gasket leaks that require more extensive repair. Always observe safety protocols during testing, including disconnecting the spark plug boot and ensuring the saw is secured against movement. If fuel, air, and ignition checks pass, proceed to inspect the carburetor’s idle and main jets for varnish or clogging and verify correct screw settings per the manufacturer’s specifications.

For diagnostic charts, begin with the symptom “engine starts but lacks power.” Follow the flow to verify fuel quality, carburetor cleanliness, air filter condition, and spark quality. If the engine stalls after a short run, check for a lean air-fuel mixture, indicating possible air leaks in the intake manifold or carburetor gaskets, and inspect the fuel filter and return line for restriction. If the saw runs but exhibits high idle or erratic RPM, adjust the idle screw within the tolerances specified by STIHL, and confirm that the throttle linkage moves smoothly without binding. When cold starting is difficult, assess choke operation and ensure that the exhaust port is not blocked by carbon buildup. For persistent starting issues, evaluate the exhaust system for restrictions or a clogged muffler screen and remove carbon buildup in a safe, controlled manner. Each diagnostic step should be documented with readings and observations to track fault progression and guide repair decisions.

In the “carburetor performance” diagnostic path, verify air leak integrity by performing a base gasket and crankcase seal inspection, then recheck carburetor fuel metering with a clean, calibrated test. If the main jet requires cleaning, disassemble the carburetor carefully, photographing steps to aid reassembly, and use appropriate solvent and brush tools to remove varnish without damaging seals. After cleaning, reassemble with new or inspected gaskets and confirm that the high and idle speed screws are set to the factory recommended positions using a proper screwdriver. If a rebuild is necessary, replace worn components such as diaphragms, needles, and seals to restore precise fuel metering and throttle response. Finally, verify overall system performance by performing a controlled test cut under light load before returning the saw to full-duty operation, ensuring it maintains steady RPM and does not overheat. This structured approach supports accurate diagnosis while preserving tool safety and reliability.

The STIHL MS 360 is a robust chainsaw that requires precise adjustment to maintain performance, efficiency, and safety. Adjustment procedures for the governor and carburetor ensure the engine delivers the correct idle and full-throttle operation under varying loads and temperatures. Proper valve and ignition timing adjustments help the engine achieve reliable starts, consistent power output, and reduced emissions. Before beginning any adjustment, ensure the saw is on a stable surface, the chain is disengaged, and the spark plug is accessible. Have the correct tool set, a clean workspace, and a fresh, appropriate fuel mix to prevent any adjustment drift caused by poor running conditions. Always follow safe testing procedures after adjustments to confirm the engine responds accurately to throttle input and load changes.

The governor and carburetor adjustments start with a baseline setup that matches STIHL manufacturer specifications for the MS 360. The process involves careful inspection of the carburetor body, linkages, and screw settings, ensuring the high-speed and low-speed circuits respond predictably when the throttle is opened and closed. To adjust the idle speed, locate the idle adjustment screw and turn it gently in small increments while the chain remains stationary, verifying that the clutch does not engage at idle and that idle stability is maintained. When adjusting the high-speed fuel metering, you must monitor engine response at full throttle, listening for smooth acceleration without misfires or bogging, and you may need to adjust the high-speed screw in minute increments. Keep the air intake free of obstructions and ensure the idle mixture is not overly rich or lean, as either condition can produce overheating, fouled plugs, or excessive smoke. Document each change and recheck engine performance across multiple load conditions to confirm the settings are repeatable and stable under typical operating scenarios.

Valve and ignition timing adjustments focus on ensuring the intake and exhaust events occur at the correct moments for optimal performance. Begin by performing a proper compression check and inspecting the valve train for wear or clearance issues, as excessive valve lash can skew timing and degrade performance. If valve clearance needs adjustment, follow the specified procedures using the correct feeler gauge values and reassemble the componentry to maintain proper seal and timing. Ignition timing should be verified with a timing light or the manufacturer’s recommended diagnostic method, ensuring the spark occurs within the precise window relative to piston position. If timing is found to be off, inspect the stator assembly, flywheel magnets, and pulse timing canister for wear or incorrect mounting, then correct any misalignment before rerunning a timing check. After any valve or ignition timing adjustment, perform a cold and warm start test, verifying that the engine starts easily, runs smoothly, and does not exhibit timing-related detonation or knock under load. Maintain meticulous records of adjustment values and test results to support future service intervals and troubleshooting efforts.

The STIHL MS 360 is a powerful saw that requires careful handling to ensure both operator safety and equipment longevity. Before any maintenance work begins, disconnect the spark plug lead to prevent accidental ignition and remove the battery or disconnect power if applicable. Ensure the work area is well lit, clean, and free of fuel, oil spills, and tripping hazards. Gather the proper tools and reference the manufacturer’s torque specifications and service limits to avoid over-tightening or damaging threads. Use a stable work surface and support the saw securely to prevent it from tipping or shifting during service. Personal protective equipment such as safety glasses, gloves, and hearing protection should be worn at all times. When lifting or moving the saw, keep the bar and chain away from your body to prevent accidental contact and injuries. Keep a fire extinguisher or appropriate extinguishing agent close at hand in case of fuel spills or sparks during repair activities.

Maintenance and repair should proceed with strict attention to safety cautions to reduce the risk of kickback, blade or bar failure, and fuel system leaks. Begin by inspecting the chain brake mechanism and throttle lockout to verify proper operation before starting any work. If the saw has a loose or damaged chain, replace it following the manufacturer's instructions and retension only after the bar and chain are reassembled. When working on the fuel system, depressurize the carburetor area and avoid creating any fuel vapors in enclosed spaces. Clean all dust and debris from the cooling fins and air intake before disassembly to minimize the risk of particulates entering the engine. Do not force parts; if a component does not move freely with normal effort, assess for wear or hidden damage and consider replacement rather than applying excessive force. After completing any repair, double-check fuel lines, clamps, and the recoil starter for secure installation to prevent future failures during operation.

Common repair procedures should be approached with a clear plan and adherence to the OEM specifications. Replacing the air filter involves removing the air intake cover, carefully extracting the old filter, and installing a new OEM filter with the correct orientation. When reinstalling the air cover, ensure the gasket seats properly to avoid air leaks that could affect engine performance. For carburetor adjustments, use a properly calibrated tachometer and follow the service bulletin for idle speed and high-speed mixture settings; any adjustments should be made in small increments with testing after each change. Replacing the spark plug requires selecting the correct heat range for the operating conditions and ensuring the electrode gap matches the specification. After reinstalling the spark plug, torque to the manufacturer’s recommended value and perform a compression check if available to confirm proper sealing. If the saw experiences hard starting or poor throttle response, verify the fuel quality, fuel filter condition, and carburetor alignment before replacing more critical components. Always test run the saw under supervision in a controlled environment after major repairs to confirm stability and safe operation before returning the unit to service.

Reassembly sequence plays a critical role in restoring a saw to its original performance and reliability. Begin by confirming that all components are present and free of damage before reinstalling each part. Carefully follow the orientation and fitment of the crankcase covers, ignition module, and flywheel shims to ensure proper timing and compression. When reinstalling gaskets and seals, apply a light coat of lubricating oil to help sealants cure evenly and prevent misalignment during tightening. Use a torque wrench to tighten fasteners to the manufacturer’s specified values, working in a crisscross pattern to distribute load evenly and avoid warping the covers or bar mount. As you reassemble the carburetor, fuel lines, and primer system, verify that connections are secure and free of leaks, then test fit the air filter and fuel tank assembly to ensure proper seating. Finally, once the chain brake, throttle linkage, and decompression system are reattached, perform a visual inspection to confirm there are no loose wires or components that could impede operation.

Operational testing and verification ensures the rebuilt saw performs safely and within factory specifications. Begin with a bench test of the ignition system, checking for spark consistency and compression using appropriate gauges. With the bar and chain removed or immobilized, run the engine through a dry idle to verify smoothness, rpm stability, and correct throttle response, listening for unusual sounds that could indicate a misassembly. Reconnect the bar and chain, and conduct a controlled idle and pull test on a non-load condition to ensure the chain remains properly tensioned and tracks true. Verify the chain brake, throttle lockout, and stop switches function as intended, and confirm that the stop controls return to at-rest positions without sticking. Finally, perform a light-load run using a fresh fuel mixture and a known good air filter, observing for consistent operation, proper muffler function, and absence of excessive exhaust smoke or fuel seepage. Maintain detailed notes of all readings and any anomalies to guide further adjustments if required.

During reassembly and testing, it is essential to follow safety protocols at all times. Always disconnect the spark plug cap or battery where applicable before handling internal components to prevent accidental starts. Wear appropriate PPE, including eye protection, gloves, and hearing protection, and work in a well-ventilated area away from ignition sources. Use the proper service tools specified by STIHL for disassembly and reassembly to minimize the risk of cross-threading or damaged components. If a component shows signs of wear beyond the manufacturer’s acceptable limits, replace it with genuine STIHL parts and avoid a makeshift repair that could compromise safety or performance. After completing testing, perform a final torque check on all fasteners and recheck critical lines for leaks or kinks, then document the results in the service log for traceability.