Homelite UT08120D - Manual (Page 12)

Page 12
NOTE: The carburetor adjustment needle(s) are equipped
with plastic cap(s) that prevent counterclockwise rotation
from the original factory adjustment. If your unit exhibits
specific performance problem(s) where the Troubleshooting
Section recommends a counterclockwise needle adjustment
and no adjustments have been made since original purchase,
the unit should be taken to a factory authorized service dealer
for repair. In most cases, the needed adjustment is a simple
task for the factory trained service representative.
TROUBLESHOOTING
“L” NEEDLE
“H” NEEDLE
Fig. 9
IDLE SPEED ADJUSTMENT
SCREW
PROBLEM CAUSE SOLUTION
IF THESE SOLUTIONS DO NOT SOLVE THE PROBLEM, CONTACT YOUR AUTHORIZED SERVICING DEALER.
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 accel-
erates but will not idle:
1. No spark
2. No fuel
3. Flooded engine
4. Starter rope pulls harder now
than when new
Carburetor requires adjustment
Carburetor requires adjustment
1. Check oil fuel mixture
2. Air filter dirty
3. Carburetor requires adjust-
ment
4. Spark arrestor screen dirty
Carburetor requires adjustment
1. 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.
2. Push primer bulb until fuel is visible in the bulb.
If fuel is not apparent, the primary fuel delivery
system is blocked. Contact a servicing dealer.
If primer bulb fills, engine may be flooded (see
next item).
3. Remove spark plug, turn blower so spark plug hole
is aimed at the ground. Move choke lever to RUN
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 lever at
RUN. If engine does not start, move choke lever
to
CHOKE and repeat normal starting procedure.
If engine still fails to start, repeat procedure with
a new spark plug.
4. Contact a servicing dealer.
Turn L needle counterclockwise 1/16 turn. If L low
needle can not be turned counterclockwise, do not
force plastic limiter caps. Contact a servicing dealer.
See Figure 9.
Turn H needle counterclockwise 1/16 turn. If H high
needle can not be turned counterclockwise, do not
force plastic limiter caps. Contact a servicing dealer.
See Figure 9.
1. Use fresh fuel and the correct 2-cycle oil mix.
2. Clean air filter. Refer to
Replacing and Cleaning
the Air Filter earlier in this manual.
3. Turn H (B) needle clockwise 1/16 turn. See Fig-
ure 9.
4. Contact a servicing dealer.
Turn idle speed screw clockwise to increase idle
speed. See Figure 9.