The engine was made in Britain by a company called "Watermota" and the
model is called the "Sea Panther". I believe parts are still available
from over there. I bought a shop manual several years ago.

I am used to hearing complaints about this engine, but only from those
who own(ed) it under the Westerbeke label. That company made getting
parts and service very painful.

My 4 cyl FWC Sea Panther is 30 yrs old and still running.