Troubleshooting - Homelite UT40502 Operator's Manual

Problem
Engine will not start.
Engine starts but will not accelerate.
Engine starts but will only run at high speed
at half choke.
Engine does not reach full speed and emits
excessive smoke.
Engine starts, runs, and accelerates but
will not idle.

TROUBLESHOOTING

Possible Cause
No spark.
No fuel.
Engine is flooded.
Starter rope pulls harder now than when
new.
Engine requires approximately three min-
utes to warm up.
Carburetor requires adjustment.
Check lubricant fuel mixture.
Air filter is dirty.
Spark arrestor screen is dirty.
Idle speed screw on carburetor needs
adjustment.
Page 1
Solution
Check spark. Remove spark plug. Reattach
the spark plug cap and lay spark plug on
metal cylinder. Pull the starter rope and
watch for spark at spark plug tip. If there
is no spark, repeat test with a new spark
plug.
Push primer bulb until bulb is full of fuel.
If bulb does not fill, primary fuel delivery
system is blocked. Contact a servicing
dealer. If primer bulb fills, engine may be
flooded, proceed to next item.
Remove spark plug, turn trimmer so spark
plug hole is aimed at the ground. Rotate
the choke dial to "RUN" position and pull
starter cord 10 to 15 times. This will clear
excess fuel from engine. Clean and reinstall
spark plug. Pull starter three times with
choke dial at "RUN". If engine does not
start, rotate choke dial to "FULL CHOKE"
position and repeat normal starting pro-
cedure. If engine still fails to start, repeat
procedure with a new spark plug.
Contact a servicing dealer.
Allow engine to completely warm up. If
engine does not accelerate after three
minutes, contact a servicing dealer.
Contact a servicing dealer.
Use fresh fuel and the correct 2-cycle
lubricant mix.
Clean air filter. Refer to Cleaning the Air
Filter Screen earlier in this manual.
Contact a servicing dealer.
Turn idle speed screw clockwise to in-
crease idle speed. See figure 1.
IdlE spEEd
scREw
Fig. 12