Let the buyer beware (Never assume!)

[Fishermark]

As I mentioned in my other recent posts - I am helping my Dad with his Mercruiser motor. I am rebuilding it. He bought this "new" motor about 8 or 9 years ago from a local shop. He had a 3.0 liter in his sportcraft that they replaced with another 3.0 liter... or so they said.<br /><br />Upon disassembling this motor and having the cylinders honed (they were not worn badly enough to rebore), I bought all the rings, bearings, gaskets etc I needed and proceeded to put things back together. Things went well until I went to gap the rings. They overlapped by about a quarter of an inch. I figured I had been given the wrong rings. I measured the bore, expecting 4". Lo and behold I find 3&7/8" instead! Upon further investigation this is a 2.5 liter not a 3.0 liter. They even put a 3.0 liter valve cover on it! Live and learn. <br />Just venting. Things will be fine. At least I didn't open the head gasket set, and rod bearings. The mains are the same, (good thing as I already installed them). And the lower gasket set was the same.