How To Service My FS38, FS45 or FS55 Line Trimmer

Performing basic maintenance on your grass trimmer is an activity that should ideally be performed annually.

So, what is required?

Step 1: Lay your trimmer in front of you with the metal shaft pointing to the left and the engine on the right hand side.

Step 2:
Change the spark plug. The spark plug suited to this equipment is the NGK brand BPMR7A. 

You remove the spark plug by lifting the rubber cover and loosening the plug by turning it with a “Scrench” (Combination Wrench) in an anti-clockwise direction. Once the plug is loosened, continue twisting it by hand until it comes out. Then put a new plug in, tightening it by hand, at first, and then doing the final tighten using your scrench. Finally, replace the rubber cover making sure it is firmly placed back over the top of the new spark plug.

Step 3: 
Open your fuel tank and empty any fuel. Using a hooking tool, hook the fuel line and drag it gently upwards until the fuel filter is hooked and exposed, ready to grab, at the opening of the fuel tank. Remove the old fuel filter by holding the fuel line in one hand and the fuel filter in the other and gently pulling them apart. Replace with a new fuel filter by gently wriggling the tip into the exposed fuel line end. Once attached, push the fuel line and new filter back into the tank and close the lid.

Step 4: 
Remove the air filter cover by pushing down on the air filter cover tab and pull out the old air filter. Put a new air filter in. Close the lid.

Congratulations, you have now completed a service on your FS38, 45 or 55.

You can purchase all the parts and tools required at Stihl Shop Penrith.

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