Homelite UT21566 Operator's Manual page 18

Problem
String will not advance when using the
EZ Wind Tap Advance System.
™
Spool retainer hard to turn when using
EZ Wind™ Tap Advance System.
Grass wraps around drive shaft hous-
ing and string head.
Lubricant drips from muffler.
TROUBLESHOOTING
Possible Cause
String is welded to itself.
Not enough string on spool.
String is worn too short.
String is tangled on spool.
Engine speed is too slow.
Screw threads are dirty or damaged.
Cutting tall grass at ground level.
Operating trimmer at part throttle.
Operating trimmer at part throttle.
Check lubricant/fuel mixture.
Air filter dirty.
Page 1
Solution
Lubricate with silicone spray.
Install more string. Refer to String
Replacement earlier in this manual.
Pull strings while alternately pressing
down on and releasing spool retainer.
Remove string from spool and rewind.
Refer to String Replacement earlier in
this manual.
Advance string at full throttle.
Clean threads and lubricate with
grease – if no improvement, replace
the spool retainer.
Cut tall grass from the top down to
prevent wrapping.
Operate trimmer at full throttle.
Operate trimmer at full throttle.
Use fresh fuel and the correct 2-cycle
lubricant mix.
Clean air filter. Refer to Cleaning
the Air Filter Screen earlier in this
manual.
SLOw
IDLE SPEED
SCREw
FAST
Fig. 17