Water forced into the exhaust by following seas can have catastrophic effects. The exhaust tube should be formed into a swan neck before it exits…

This is a chamber to collect any water that remains in the exhaust pipe when the engine is stopped. It also acts as a baffle…

This device stops water syphoning back up the exhaust pipe into the engine. It should be sited so that the outlet pipe or non-return valve…

The most common type of exhaust – and safest in terms of fire risk – is the wet exhaust, where cooling water is injected into…

The thermostat regulates cooling water flow, opening and closing depending on engine heat, allowing more or less water to pass, thus keeping engine temeperature stable.…

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…