Cummins Onan Seawater Pumps – JMP (Aftermarket)

JMP raw water pumps and impeller kits to suit Cummins Onan marine generator sets, keeping the genset's own cooling circuit separate from the main engine.

Gensets often run harder and longer than the main engine on a cruising boat, so their impellers can wear out faster — check on a separate schedule to your main engine service.