Homelite UT21006 Troubleshooting, Problem, Possible Cause, Solution, Page 11 - English

TROUBLESHOOTING

Problem	Possible Cause	Solution
Engine starts but will not accelerate.	Engine requires approximately three	Allow engine to completely warm up. If
	minutes to warm up.	engine does not accelerate after three
		minutes, contact a servicing dealer.
Engine starts but will only run at high	Carburetor requires adjustment.	Contact a servicing dealer.
speed at half choke.
Engine does not reach full speed and	Check lubricant fuel mixture.	Use fresh fuel and the correct 2-cycle
emits excessive smoke.		lubricant mix.
	Air filter is dirty.	Clean air filter. Refer to Cleaning
		the Air Filter Screen earlier in this
		manual.
	Carburetor out of adjustment.	Contact a servicing dealer.
Engine starts, runs, and accelerates	Idle speed screw on carburetor needs	Turn idle speed screw clockwise to
but will not idle.	adjustment.	increase idle speed. See figure 18.
String will not advance.	String is welded to itself.	Lubricate with silicone spray.
	Not enough string on spool.	Install more string. Refer to String
		­Replacement earlier in this manual.
	String is worn too short.	Pull strings while alternately pressing
		down on and releasing spool retainer.
	String is tangled on spool.	Remove string from spool and rewind.
		Refer to String Replacement earlier in
		this manual.
	Engine speed is too slow.	Advance string at full throttle.
Spool retainer hard to turn.	Screw threads are dirty or damaged.	Clean threads and lubricate with
		grease – if no improvement, replace
		the spool retainer.
Grass wraps around driveshaft housing	Cutting tall grass at ground level.	Cut tall grass from the top down to
and string head.		prevent wrapping.
	Operating trimmer at part throttle.	Operate trimmer at full throttle.
Lubricant drips from muffler.	Operating trimmer at part throttle.	Operate trimmer at full throttle.
	Check lubricant/fuel mixture.	Use fresh fuel and the correct 2-cycle
		lubricant mix.
	Air filter screen dirty.	Clean air filter. Refer to Cleaning
		the Air Filter Screen earlier in this
		manual.

Page 11 — English