Homelite UT74121A - Manual (Page 36)

UK - Page 36
Length of Bar Guide Bar Part Number Chain Part Number
305 mm (12 in.) UP08695 UP08692
356 mm (14 in.) UP08696 UP08693
406 mm (16 in.) UP08698 UP08694
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
excessive smoke.
1. No spark.
2. Flooded engine.
Carburettor requires “ L ” (Low jet)
adjustment.
Carburettor requires “ H ” (High jet)
adjustment.
1. Check oil fuel mixture.
2. Air filter dirty.
3. Spark arrester screen dirty.
4. Carburettor requires “ H ” (High
jet) adjustment.
1. Check spark. Remove air filter cover. Remove
sparking plug from cylinder. Reattach the sparking
plug wire and lay sparking plug on top of cylinder
with the metal part of plug touching the cylinder. Pull
the starter rope and watch for spark at sparking plug
tip. If there is no spark, repeat test with a new
sparking plug.
2. With the ignition switch off, remove sparking plug.
Move choke lever to run position (pushed in com-
pletely) and pull starter cord 15 to 20 times. This will
clear excess fuel from engine. Clean and reinstall
sparking 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 sparking plug.
Contact a Homelite service dealer for carburettor
adjustment.
Contact a Homelite service dealer for carburettor
adjustment.
1. Use fresh fuel and the correct 2-cycle oil mix ratio.
2. Clean air filter. Refer to “Maintenance – Cleaning the
Air Filter” earlier in this manual.
3. Clean spark arrester screen. Refer to “Maintenance
– Cleaning the Spark Arresting Silencer” earlier in
this manual.
4. Contact a Homelite service dealer for carburettor
adjustment.
BAR AND CHAIN COMBINATIONS
TROUBLESHOOTING