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9. Worn neoprene oil guard gaskets on
the intake valves.
Loss of Power
1. Dirty carburetor.
2. Faulty ignition.
3. Worn rings,
pistons, or sleeves;
burned or sticking valves.
4. Faulty governor operation.
5. Faulty throttle, governor or choke
linkage.
6. Crack in intake manifold or leaky
gasket.
7. Blown head gasket.
8. Brakes dragging.
9. Improper valve adjustment, worn or
bent push rods .
10. Excessive exhaust back-pressure.
11. Clogged air cleaner.
Erratic Misfire
1. Dirty carburetor.
2. Weak or broken valve springs.
3. Sticking valves.
4. Faulty ignition.
Pre-Ignition
1.
Poor grade of fuel.
2. Ignition timing too far advanced.
3. Engine overheating.
4. Heavy carbon deposits in the com-
bustion chamber.
5. Spark plugs of improper heat range.
6. Insufficient tappet clearance.
7. Burned or worn valves.
8. Improper distributor advance.
Continuous Misfire
1. Stuck or burned valves.
2. Blown head gasket.
3. Faulty ignition.
4. Improper timing.
Engine Overheating
1. Thermostat stuck closed.
2. Water leakage - - too low water level.
3. Fan belt slipping.
4. Clogged radiator core.
5. Carburetor mixture too lean.
6. Improper ignition timing.
7. Fouled cooling system.
8. Improper valve timing.
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