Stihl FCS-KM Instruction Manual
![Stihl FCS-KM manual cover](/images/42a74c2e0cacbc241b021dc5/thumbs/thumb175x175.webp)
To start your Stihl FCS-KM, make sure the fuel tank is filled, set the choke to the closed position, press the primer bulb several times until fuel is visible, set the control lever to the start position, and pull the starter rope sharply until the engine fires.
If the engine won't start, check the fuel level, ensure the spark plug is functioning, inspect the air filter for clogs, and make sure the choke is in the correct position.
Regular maintenance should be performed after every 25 hours of operation or at least once a season, including checking the air filter, spark plug, and fuel system.
It is recommended to use a high-quality 89 octane unleaded gasoline mixed with a 2-stroke engine oil at a 50:1 ratio.
To replace the trimmer line, remove the trimmer head, take out the spool, wind the new line onto the spool following the directional arrows, and reassemble the trimmer head.
Remove the air filter cover, take out the filter, and clean it with warm, soapy water. Allow it to dry completely before reinstalling. Replace it if it's damaged or heavily soiled.
If the engine runs rough, check the spark plug for wear, ensure the air filter is clean, and inspect the fuel system for blockages or stale fuel.
No, it is essential to use a high-quality 2-stroke engine oil specifically designed for air-cooled engines to ensure optimal performance and engine longevity.
Adjusting the carburetor should be done carefully. Locate the adjustment screws (H, L, and LA) and adjust them according to the specifications in the manual, typically starting with the L screw for idle and the H screw for high-speed adjustment.
Always wear appropriate protective gear including gloves, eye protection, and sturdy footwear. Ensure the work area is clear of hazards, and never operate the equipment while fatigued or under the influence of substances.