Boat Maintenance: But I Have a Question

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	Name:	Maverick -
	Subject:	But I Have a Question
	Date:	7/15/2008 12:41:02 AM

If piston blown, no reason to rebuild the powerhead till you determine what caused the blown piston.

The most common causes of engine failure are detonation, pre-ignition, and overheating or any combination thereof. The result of these problems is that the temperature in the combustion chamber gets too high. As soon as the temperature in the chamber gets higher than normal the engine begins to run poorly and the damage to the engine begins. Detonation is usually caused by the air/fuel mixture being lean and the erosion of the piston starts at the edge or outer diameter of the piston. If the erosion starts in the center of the piston it is probably an ignition problem. An engine running hot due to deteriorated water pump or cooling system blockage compounds the problem.

So even if the powerhead is rebuilt if you do not correct the orignal issue which caused the failure then next thing you know you have another blown piston.

But Cat is the expert here not me and I am sure if he rebuilds the powerhead he will properly diagnose the orignal issue which caused the failure in the first place.