Worldwide aftermarket manufacturer
and distributor of parts for Detroit
Diesel ® engines, Twin Disc ®
Marine Transmissions,
Allison Marine, Engine Gauges
and Marine Gauges.

Diesel Pro Power is the world's largest replacement parts manufacturer and distributor of marine transmission parts for Allison M and MH marine transmissions. Finding the right parts to maintain, repair or rebuild is just a few clicks away. We are prepared to help with you your rebuilt or used Allison marine transmission. Boat owners, marine transmission mechanics and repair shops specializing in the maintenance, repair, rebuilding of used or rebuilt Allison marine transmission alike visit our site daily. You will find these marine transmissions in fishing, scuba diving, coast guard, and other work and pleasure boat applications around the globe. 

The Allison M and MH marine transmissions were exclusive manufactured for Detroit Diesel marine engines and come in the following models M15, M15L, M15R, M20, M20L, M20R for Allison M and MH20, MH20L, MH20R, MH45, MH45L, MH45R for MH. To find the parts you need all you need to do in to on the appropriate transmission model M or MH. We do the rest. For the curious, MH 20 R stands for Allison MH marine transmission with a 2 to 1 ratio that is right hand rotation.