GENERAL INFORMATION
1-46
Engine Overheating
(Cooling System)
WARNING
Do not remove the radiator cap, coolant drain plug or disconnect
any coolant hose immediately after or during engine operation.
Scalding fluid and steam may be blown out under pressure and
cause serious injury. When the engine has been operated, the
coolant is very hot and under pressure. Attempting to remove
the items when the engine is hot can cause the coolant to spray
violently from the radiator, water pump or hose, causing severe
burns and injury.
1. Low coolant level.
2. Air in cooling system.
3. Clogged radiator, hose or engine coolant passages.
4. Worn or damaged radiator cap.
5. Damaged water pump.
Engine Overheating
(Engine)
1. Improper spark plug heat range.
2. Low oil level.
3. Oil not circulating properly.
4. Valves leaking.
5. Heavy carbon deposits in the combustion chamber.
6. Dragging brake(s).
7. Slipping clutch.
Preignition
Preignition is the premature burning of fuel and is caused by hot spots in the combustion chamber.
Glowing deposits in the combustion chamber, inadequate Cooling or an overheated spark plug can all
cause preignition. This is first noticed as a power loss but eventually causes damage to the internal
parts of the engine because of the high combustion chamber temperature.
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