Originally Posted by Starwatch
The water pump for my 30MDJA Generator (Onan 131-0267) is no longer manufactured and there are no parts or pumps available.
Has anyone found a solution to provide a salt water pump for the Onan generator? The generator has very low hours so am reluctant to replace it.
There is one on Ebay for $870 right now . . . or you can do like I did for $150 and replace it with a brass 3/8" Jabsco pedestal pump. Mount it on the oppose end of the platform from the Oberdorfer engine circulation pump. Place a 4 or 5 inch pulley on it and with a longer belt, run both pumps off the engine crankshaft pulley.
My generator is a 7.5 MDJE and I believe it has the same raw water pump. I converted mine about 5 years ago. Takes a little ingenuity, but it works better than the old gear driven pump. Don't forget to fashion a cover plate for the PTO where the old pump was installed.