Homelite UH10817 - Manual (Page 27)

TROUBLESHOOTING
IF THESE SOLUTIONS DO NOT SOLVE THE PROBLEM CONTACT YOUR AUTHORIZED SERVICING DEALER.
PROBLEM POSSIBLE CAUSE SOLUTION
Engine will not start:
(Make sure RUN/STOP switch is
in RUN “I” position.)
1. NO SPARK.
2, NO FUEL
3. FLOODED ENGINE.
1. Check Spark. Remove cylinder cover. Remove spark
plug from cylinder. Reattach the spark plug wire and
lay spark plug on top of muffler or cylinder. Pull the
starter rope and watch for spark at spark plug tip. If
there is no spark, repeat test with a new spad< plug.
2. Push primer bulb until bulb is full of fuel. If bulb does
not fill, primary fuel delivery system is blocked. Con­
tact a servicing dealer. If primer bulb fills, engine may
be flooded (see next Item).
3. With the switch off, remove spark plug. Turn saw so
spark 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.
Engine starts but will not accelerate: CARBURETOR REQUIRES ADJUSTMENT. *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.
Engine starts but will only run at high
speed at half-choke:
CARBURETOR REQUIRES ADJUSTMENT.
Engine does not reach full speed
and emits excessive smoke: 1. CHECK OIL FUEL MIXTURE.
2. AIR FILTER DIRTY.
3. CARBURETOR REQUIRES ADJUSTMENT.
4. SPARK ARRESTOR SCREEN DIRTY.
*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.
1. Use fresh fuel and the correct 2-cycle oil mix.
2. Clean per instruction in maintenance section.
3. Turn "H" needle clockwise 1/16 -1/8 turn.
4. Replace per instructions in maintenance section.
Engine starts, runs, and acceler­
ates but will not Idle.
Bar and Chain Running Hot and
Smoking:
CARBURETOR REQUIRES ADJUSTMENT!
1. CHAIN OIL TANK EMPTY.
2. CHECK CHAIN TENSION
3. CHECK FOR OILER FUNCTION.
Turn idle speed screw “T” clockwise to increase idle
speed. (If chain continues to turn at idle, screw counter­
clockwise to decrease speed). Wear protective equip­
ment and observe all safety instructions.
1. Oil tank should be filled every time that fuel tank is
filled.
2. Tension chain per instructions in Chain Tension sec­
tion.
3. Run at full throttle 15 to 30 seconds. Stop saw and
check for oil dripping from Safe-T-Tip and guide bar. If
oil is present the chain may be dull or bar may be
damaged. If no oil contact a servicing dealer.
Chain Not Cutting or Binding: CHECK GUIDE BAR AND CHAIN. 1. Refer to bar and chain maintenance.
Note: This engine complies with EPA (Environmental Protection Agency) and CARB (California Air Resource Board) regulations which require exhaust
emission control. As a result, the carburetor adjustment needle(s) are equipped with plastic cap(s) that prevents counterclockwise rotation from the original
factory adjustment. If your unit exhibits specific performance problem(s) where the Trouble Shooting 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 center for repair. In most
cases, the needed adjustment is a simple task for the factory trained service representative.
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