Sorry about that Never Monday, I understood Bombay77 to say that he was looking for a chain case cover and a fresh water
pump .... I didn't know anyone was searching for a heat exchanger
or an impeller. I don't know what engine the Westerbeke L-25 is based on (like I said I assume it is based on a Kubota). I have an engine and a gen-set, both based on a Kubota engine, and believe me, I have never been laughed out of a kubota dealer. What ever engine the Westerbeke L-25 engine is based on (Westerbeke didn't make it!) there are engine parts out there a lot less expensive than a Westerbeke dealer. I'm guessing that the manufacturer of the base engine is the type of information Bombay77 was searching for.