The Stihl FS55 is a straight-shaft cutter with sufficient power for commercial use on an occasional basis, but is the most suitable for those who have a home. Its weight is only 11 lbs. (5 kg), a nice feature for those who have large properties that require excessive trimming. By using high octane gas mixed with a good two-stroke oil, this machine must provide years of service. However, if your STIHL FS55 starts to malfunction, or not at all, solving the problem is not too difficult.
Place your mower on a workbench or other flat surface. Remove the rubber cover from the spark plug. Use a wrench to remove the spark plug. Turn the key clockwise until the stopper is released. If the spark plug is black, Sustitúyela a new one. Tighten the plug again by turning the key clockwise until it is snug. Replace the cap on the spark plug.
Unscrew the fuel tank cap. Carefully unroll the mower from the weeder by pulling the gasoline out of the tank into a clean container, such as a large can of coffee or a bucket. With the mower completely upside down, shake gently until the fuel filter comes out of the tank.
Using needle-nosed pliers, gently pull the fuel filter out of the gas line. Get rid of it and slide the new fuel filter. Roll the brush cutter again until the tank opening is up. Reposition the fuel line and filter into the fuel tank.
Examine the gasoline for waste. If the gasoline is old or has waste, dispose of it. Replace with high octane gasoline properly mixed with two-stroke oil. If the gasoline is clean, use the funnel to insert it into the tank and pour it back into the reservoir. Screw the tank cap back on.
Locate the air filter cover on the STIHL mower. It'll be on the engine side. Unscrew the lid by turning the threaded knob to the right. Remove the air filter and clean, wash in warm soapy water and then dry completely. If the filter is dirty and greasy even after washing, change it to a new one. If not, reposition the air filter cover again.
It passes towards the end of the tail of the pruner. Remove the Stop button from the bobbin base by turning it counter-clockwise until it is released. Check the reel cutting line. If more is required, add the desired amount by taking care when winding the new line in the direction shown on the spool. Replace the spool on the head and screw the percussive knob back into place.
Tips
Read the owner's manual to learn more about STIHL FS 55.
Warning
Never work on a wire trimmer if the engine is hot.