Re: Replacing the Auxiliary
I think there's too many factors at issue to ballpark a price. Especially if you're going to change to a different brand of engine, it won't be a matter of just swapping out and there could be many hours of labor involved.
If the engine is at the end of its life, what else is too? That said, I bought a 30 year old boat, with the original Yanmar in it, but it is in very good shape and runs great.