VM Motori HR492 H.HT Marine Diesel Engine

This engine was delivered to us for a major overhaul after it being allowed to overheat due to lack of coolant as a consequence of a leaking fresh water pump.  The overheating caused severe damage to the pistons and liners and the cylinder heads.  The rest of the engine and the components survived the overheat rather well.

VM Motori HR492 H.HT Marine Diesel Engine

As it was an old model of the VM marine engines, the said waterpump was no longer available but a waterpump from a later VM engine was fitted but this pump required minor modifications to the mountings and drive pulley and a small modification to the sea water pump to allow more clearance for the different drive pulley, which was taken from a VM industrial engine.  After a complete strip down and rebuild the engine was reassembled and after bench testing it was found to run very well and it gave this VM Motori marine engine a new lease of life.

VM Motori HR492 H.HT Marine Diesel Engine

This VM Motori marine engine was fitted into a tall ship as the back up engine.  An uncomplicated diesel engine without any electronics to manage the fuel injection system, an ideal engine for this application.

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