The water system should be plumbed using non-kink, large-bore water piping, long enough to soak up any engine movement, ideally double jubilee-clipped. The picture shows…

A pipe of too small a bore will restrict the flow of water to the engine. At least part of the pipe between the inlet…

Debris seen through the transparent cover on this water strainer will restrict water flow and may cause overheating. To clear it, unbolt the cover, remove…

Several types are used, all normally connected directly to the inlet skin fitting. They enable the water to be turned off when the boat is…

The temperature of combustion in a diesel engine is around ten times the temperature required for the moving parts to operate efficiently. Uncooled, an engine…

Air density increases as its pressure increases and as its temperature is reduced. To get the maximum benefit from a turbocharger an intercooler, or aftercooler,…

Turbochargers are driven by the exhaust gases and force more air into the cylinders, resulting in higher engine output. Naturally aspirated engines rely on atmospheric…

To change the air filter on this engine, first unclip the cover then remove the filter. Wash it in soapy water, and dry thoroughly before…

Fuel, even direct from the supplier, is never completely free of impurities. All fuels and lubricating oils are contaminated to some degree. Manufacturers supply fuels…

The fuel tank shut-off valve should be as close as possible to the tank, and outside the engine compartment in case it needs to be…