Homelite UT10946 - Manual (Page 59)

59
STO P
TROUBLESHOOTING
Using Troubleshooting Chart
If you are experiencing a problem that is not listed in this chart, see your Homelite Servicing Dealer for service.
When you have checked all the possible causes listed and you are still experiencing the problem, see your Homelite Servicing Dealer.
PROBLEM POSSIBLE CAUSE SOLUTION
Engine will not start:
(Make sure Ignition switch
is in start position “I”.)
Engine starts but will not
accelerate properly:
Engine starts but will not
run properly at high speed
.
Engine does not reach full
speed and / or emits ex-
cessive smoke:
Engine starts, runs, and ac-
celerates but will not idle.
Bar and Chain Running
Hot and Smoking:
Engine starts and runs, but
chain is not rotating:
1. No spark
2. Flooded engine.
Carburetor requires “L” (Low jet) adjust-
ment.
Carburetor requires “H” (High jet) adjust-
ment.
1. Check oil fuel mixture.
2. Air filter dirty.
3. Spark arrester screen dirty.
4. Carburetor requires “H” (High jet) ad-
justment.
Carburetor requires adjustment.
1. Chain oil tank empty.
2. Check chain tension for overtight con-
dition.
3. Check for oiler function.
1. Chain brake engaged.
2. Chain tension too tight.
3. Check guide bar and chain assembly.
4. Check guide bar and chain for damage.
* Note: This engine complies with EPA (Environmental Protection Agency) regulations which
require exhaust emission control. As a result, the carburetor adjustment needles are equipped
with plastic caps that limit the rotation from the original factory adjustment. If your unit exhibits
specific performance problems that can not be corrected by the Trouble Shooting Section, the
unit should be taken to a Homelite Servicing Dealer for repair.
A
1. Check Spark. Remove air filter cover. Remove spark plug
from cylinder. Reattach the spark plug wire and lay spark
plug on top of cylinder with the metal part of plug touching
the 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. With the ignition switch off, remove spark plug. Move
choke 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 (I) 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 choke and
repeat normal starting procedure. If engine still fails to
start, repeat procedure with a new spark plug.
* Contact a Homelite Servicing Dealer for carburetor adjust-
ment.
* Contact a Homelite Servicing Dealer for carburetor adjust-
ment.
1. Use fresh fuel and the correct 2-cycle oil mix ratio.
2. Clean per instruction in Maintenance-Air Filter Section.
3. Clean per instructions in Maintenance-Spark Arresting
Muffler Section.
4. * Contact a Homelite Servicing Dealer for carburetor
adjustment.
Turn idle speed screw “T” [see illustration (A)] clockwise to
increase idle speed. (If chain turns at idle, turn idle speed
screw “T” counterclockwise to decrease speed). Wear pro-
tective equipment and observe all safety instructions.
1. Oil tank should be filled every time that fuel tank is filled.
2. Tension chain per instructions in Operation-Chain Ten-
sion section.
3. Run at half throttle 30 to 45 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 on SAFE-T-TIP, contact a Homelite Servicing Dealer.
1. Release chain brake, see Operation-Chain Brake Sec-
tion.
2. Retension chain, refer to Assembly-Chain Tension Sec-
tion.
3. Refer to Assembly-Assembling the Bar and Chain Sec-
tion.
4. Inspect guide bar and chain for damage.