Cooling,           Raw water. Pump twin impeller . One circulates cooling water

                         the other is a bilge pump.

            Or :-     Heat exchanger with a similar pump. One impeller pumps raw water past

                         the past the heat exchanger, the other circulates coolant around the engine.

Transmission,   Special spring  loaded gearbox, pressure lubricated from the engine

                         (Note :- Do NOT use multi grade oil in the engine (use a straight diesel

                         engine oil) or the gearbox will slip

Servicing,         When carrying out an oil change remember to drain the engine oil from the

                         fuel injection pump as it is lubricated by the engine system