I have an early 70's 18' tri-hull with an inboard/outboard. We bought it used with a ford car engine in it which the former owners installed. That engine has gone bad now and I am looking for a source for a rebuilt or new marine engine. I don't know what was originally in it. We have done a lot of restoration on this boat i.e. new floor and carper, rewired the whole boat so I am hoping to find an engine source. Thanks for any input.