the gen 5 block likes to crack. 92 to 96. it will crack on the outside by motor mounts and be easy to spot. the gen 6 is tougher. it will crack in the valley under the intake and get water in oil. I have seen gen 6's push freeze plugs part way out without cracking. have you seen the engine running with the water coming out? will seller let you pull the intakes to check for internal cracks?

haven't seen the boat in person and haven't asked if i could putt the intake. i wouldn't let someone pull the intake if i were the seller. lol

I would typically agree, but the engine can't be run with a busted out freeze plug anyway. So, I can see both sides...kind of.

This is one of those scenarios where why if the owner states no big deal than why they don't handle it ? Oh, that's right...because it is a big deal.

Buyer beware.