fishndad62
New member
My 1992 Mercruiser 4.3l has a cracked block. My bad, I went from memory last year when winterizing instead of digging out the book (slaps himself across the back of the head). I have a known good 1990 OMC 4.3l I intend to swap in. Obviously the exhaust manifolds need to be swapped. Since the OMC was mated to a Cobra outdrive, I presume the bell housing will also need to be swapped. I'll guess (and find out soon enough) that the wire harness/plugs are different. Seems like pretty much everything else should stay on the OMC - for example, I think the Mercruiser had electronic ignition and the OMC might have traditional points. Is there anything else on the Mercruiser that needs to be swapped onto the OMC?