8-2
SERVIC
I
NG
INFORMATION
TROUBLESHOOTING
ENGINE
Complai
nt
Symptom and
poss
ible causes
Engine
will not start Compression too
low
or Is hard
to
start.
1.
Worn cylinder.
2. Worn piston ring.
3. Worn
valve guide or improper valve seating.
4. Loose spark plug.
5. Broken, cracked or damaged piston.
6.
Slow cranking starter motor.
7. Mistimed valves.
8. Tappel clearance out
of
adjustment.
Spark
plug
not
sparking
1.
Damaged spark plug.
2.
Damaged
spark
plug
cap.
3.
Fouled spark plug.
4. Wei spark plug.
5. Defective ignition coil.
6. Open or short
in
high-tension cord.
7. Defective generator.
8. Defective COl unit.
No
fuel
reaching
the
carburetor
1. Clogged fuel tank vent hose.
2.
Clogged or
de
fective fuel valve.
3. Defective carburetor needle
va
lve.
4. Clogged luel hose.
5. Clogged fuel filter.
Engine
stalls
easily
. 1. Fouled
spar1c;
plug.
2.
Defective generator.
3. Defective COl unit.
4. Clogged
or
defective luel valve.
5. Clogged carburetor jet.
6. Tappet clearance out
of
adjustment.
Remedy
Replace.
Replace.
Repair or replace.
Tighten.
Replace.
See electrical
section.
Adjust.
Adjust.
Replace.
Replace.
Clean
or replace.
Clean
and dry or replace.
Replace.
Replace.
Replace.
Replace.
Clean or replace.
Clean or replace.
Replace.
Clean or replace.
Clean
or
replace.
Clean or replace.
Replace.
Replace.
Clean
or
replace.
Clean.
Adjus
t.
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