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Mercruiser marine engine cylinder head

Overheated Mercruiser Cylinder Head

The picture below shows the cylinder head of a Mercruiser marine engine, the effect of expansion due to overheating can be clearly seen in the area circled in red. BMW, Mercruiser and Cummins Mercruiser are all derivatives of the VM engine and …
Mercuiser Marine Engine Sump

Sump & Carbon Contamination

This is a sump that has been removed from a Mercruiser 220hp Marine Engine 6 cylinder. The oil was so badly contaminated with carbon it became as thick as grease as you can see in the picture below. The crankshaft had been …