Hello I'm new to boats and just bought a 1982 Ebko with a 3.8 Buick and a omc outdrive stringer I believe. I was told to change the impeller on it is there a write up on this? And I cant seem to nail down a part # for the impeller. Thanks.
Get a genuine OMC service manual. Your engine is a Chevy not a Buick. If there are no heating issues leave it alone. Drain and re fill the gear housings. Change the engine oil.