5
TROUBLE SHOOTING
(engine)
CONDITION POSSIBLE
CAUSE
A.
Hard Starting or Loss of Power
(
Check First for Dirty Air Cleaner)
1. Faulty Ignition.
a. Loose or grounded high tension or
breaker point leads.
b. Improper breaker point gap and timing.
c. Defective breaker points.
d. Faulty spark plug or improper gap.
e. Faulty condenser or coil.
2.
Faulty Fuel System.
a. Gasoline not getting to carburetor.
1. Dirt or gum in fuel line.
3.
Fuel pump faulty.
b. Dirt in carburetor.
c. Carburetor improperly adjusted.
B.
Overheating
1. Insufficient available cool air.
2. Dirty air intake screen, shroud or cooling
fins.
3. Improper fuel.
4. Fuel mixture too lean.
5. Improper ignition timing.
6. Engine overloaded.
7. Tight tappet clearance.
C.
Backfiring
1.
Fuel mixture too lean.
2.
Improper timing.
3.
Valve "sticking".
D.
Occasional "Skip" at High Speed
1.
Spark plug gap too wide.
2.
Improper carburetor setting or lack of fuel.
3.
Wrong type spark plug. Use recommended
spark plug.
4.
Improper timing.
E.
Operating Erratically
1.
Vent in gas cap plugged .
2.
Loose ignition connections.
3.
Faulty choke control.
4.
Improper fuel mixture.
5.
Water in fuel.
6.
Air leaks in manifold or carburetor
connections.
7.
Clogged fuel line.
8.
Fuel pump faulty.
F.
Engine Will Not Idle
1.
Improper carburetor idling adjustment.
2.
Carburetor clogged.
3.
Spark plug gap set too close.
4.
Leaking carburetor or manifold gaskets.
