Craftsman 536.773520 Operating Instructions Manual page 22

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