I am in the process of purchasing my first boat. It seems like a fairly good deal except the fact that the engine was rebuilt due to the impeller going out last year. It is a '99 Volvo 5L. From what I can tell from the paper work, it has a remachined block, new pistons, rings, gaskets, lifters, oil pump, cam brg set, exhaust seals and elbows, water pumps, and of course impeller. My question is this, as a new boat owner, what kind of reliability can I expect from a rebuilt engine? The last thing I want is a lemon for the first one. I am having a buyers inspection performed. Any advice is appreciated.