Originally Posted by machineman89
1976 21' wellcraft...towed by my old mans truck..
i believe after the chevy 350 swap in the boat... salt water through a cast iron block dosent speak well for head gaskets...and overall health of a motor
I like the old Nova boats, well built craft. Always flush the engine well and use marine head gaskets, they have stainless in place of regular steel. Same goes for thermostats, totally different than car stuff, but I've seen them fitted and destroy the engine in one run. Car stuff doesn't belong on a boat motor even tho they fit, the results can be deadly to the motor and people. My Donzi has a 351W which I believe is original (1990) and still going strong. Exhaust manifolds will be the first to rot and often give the impression of a head gasket, water on plugs and in the oil. I've seen engines replaced/repaired because of bad manifolds because they didn't know it wasn't an engine problem. You could fit it with a closed cooling system, but unless you put a lot of time on salt or refuse to flush out it'll never pay for itself.