Homelite UT10517/18 manual Bar and chain combinations, Troubleshooting

bar and chain combinations

Model No.	Length of Bar	Guide Bar Part Number	Chain Part Number	drive Links
UT10517	18 in.	310627001	671258001	62 link 3/8 in. low profile
UT10518	18 in.	310628001	901430001	72 link 0.325 in. standard
UT10520	20 in.	310629001	900920027	78 link 0.325 in. standard

troubleshooting

Problem	Possible Cause			Solution
Engine will not start.	No spark.			Clean or replace spark plug. Reset spark plug gap. Refer to Spark
[Make sure ignition				Plug Replacement earlier in this manual.
switch is in the RUN	Engine is flooded.			With the ignition switch OFF, remove spark plug. Move choke
(  l  ) position.]
				lever to run position (pushed in completely) and pull starter cord
				15 to 20 times. This will clear excess fuel from engine. Clean and
				reinstall spark plug. Set ignition switch to run (  l  ) position. Push
				and fully release primer bulb 7 times. Pull starter three times with
				choke lever at run. If engine does not start, move choke lever to
				half choke and repeat normal starting procedure. If engine still
				fails to start, repeat procedure with a new spark plug.
Engine starts but will	Carburetor requires “L”			Contact an authorized service center for carburetor adjustment.
not accelerate prop-	(Low Jet) adjustment.
erly.
Engine starts, then	Carburetor requires “L”			Contact an authorized service center for carburetor adjustment.
dies.	(Low Jet) adjustment.
Engine starts but will	Carburetor requires “H”			Contact an authorized service center for carburetor adjustment.
not run properly at	(High Jet) adjustment.
high speed.
Engine does not reach	Oil/fuel mixture incorrect.			Use fresh fuel and the correct 2-cycle oil mix ratio.
full speed and/or emits	Air filter is dirty.			Clean air filter. Refer to Cleaning the Air Filter in the Maintenance
excessive smoke.
				section of this manual.
	Spark arrestor screen is			Clean spark arrestor screen. Refer to Inspecting/Cleaning the Spark
	dirty.			Arrestor Screen in the Maintenance section of this manual.
	Carburetor requires “H”			Contact an authorized service center for carburetor adjustment.
	(High Jet) adjustment.
Engine starts, runs,	C a r b u re t o r		re q u i re s	Turn idle speed screw “T” clockwise to increase idle speed.
and accelerates but	adjustment­	to idle speed.		Refer to Adjusting the Carburetor in the Maintenance section of
will not idle.				this manual.
Chain turns at idle.	C a r b u re t o r		re q u i re s	Turn idle speed screw “T” counterclockwise to decrease speed.
	adjustment­	to idle speed.		Refer to Adjusting the Carburetor in the Maintenance section of
				this manual.
	Air leak in the intake			Contact an authorized service center for a rebuild kit.
	system.

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