TROUBLESHOOTING
Engine Lacks Power
Possible Causes Remedy
Grass Wound around Trimmer Head Clean trimmer head
I
Gas:Oil Ratio
;s,”
;3;h;;;pi
I
ratio
Stale Fuel
Carburetor Improperly Adjusted Adjust carburetor
I
Flywheel Key Sheared or Missing
See
“Low
Compression”
Low Compression
Replace flywheel key
Engine Has Low Compression
Possible Causes Remedy
I
Insufficient Oil in Fuel
Air Leak in Lower Crankcase Replace lower crankcase seals
Rebuild engine
Piston Rings Excessively Worn
Use fuel with gasoil ratio
Air Leak in Cylinder Mounting Area
Air Leak at Spark Plug
Replace gasket and tighten mounting bolts
Replace defective plug or cylinder
Engine Backfires
(indicated by burnt air cleaner element)
Possible Causes
Muffler and Exhaust Port Plugged
with Carbon
Sheared or Missing Flywheel Key
Operator Constantly Revving Engine
I
Decarbonize muffler and exhaust ports
Replace flywheel key
Educate Operator
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9
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