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TROUBLE SHOOTING CHART
18
F-050204L
Engine overheats. Engine cooling system
clogged.
Clean debris screen and
engine cooling fins.
Carburetor out of adjustment. Adjust carburetor. Take the
unit to an authorized Service
Center.
Oil level is low. Add oil.
Engine will not stop
running.
Defective throttle control
lever or wire.
Inspect and replace
damaged parts.
Throttle not adjusted
properly.
Move throttle to the full OFF
position.
Poor trimming
performance.
Trimmer line length is too
short.
Correct line length is 21.5
inches. When less than 1/2
this length, replace the line.
Engine not set at FAST
speed.
Move engine throttle lever to
FAST position.
Trimmer vibrates. Set screw for trimmer head
is loose.
Tighten set screw with
T-handle wrench.
Trimmer line lengths are
substantially different.
Adjust trimmer line to
approximately equal lengths.
Loose nuts or bolts. Check all bolts and nuts,
including engine bolts.
Broken trimmer head. Replace broken part.
Trimmer head does not
retain line
Trimmer line not properly
attached.
Follow instructions on decal
or in the Service section of
the owner’s manual.
Broken line retainer. Replace trimmer head
assembly.
Trimmer line not correct size. Use a 0.155 inch diameter
trimmer line.