Bought a 89 sea ray with new 4.3 crate engine. Previous owner installed the engine but never started it. It sat a couple years and I bought it. I took it to the lake and notice it had alot of blow by coming from the valve covers, so I figured the rings were not seated good and I took it easy to let the engine get some break in time. Took it back to the lake today and same thing-ran awesome but lots of blow by. I'm thinking the cylinders were rusty where it sat soo long without being started and the rings will never seat now. I'm thinking I will take her apart and see about some new ring and a hone probably.. What you guys think?? And what is the differance between a marine 4.3 and a truck 4.3?
