Identify this engine? I think it is volvo penta MD5..

The last dedicated marine engines Volvo made, before going to marinised vehicle and industrial machines.
I hold them in great affection, they are tough and simple.
I remember once when motoring off Denmark, pulling out the dipstick and boiling seawater spurted out for a few minutes, the engine was full of dirty salt water, but still running happily :)
Your vision is restricted to small engine methinks
Penta has been an important part of Volvo with input to the design of the core engines meaning that for example the front of the engines were constructed able to take large amounts of HP and the 40 series was even built in its own new built factory and although used in a small number of trucks was essentialy marine
 
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