Getting back into boating after 15 years, I bought a 1979 SeaRay with a Mercruiser 470. While tuning up the carb, the barrel of water the outdrive was in tipped a little and exposed the impeller intake (without my noticing!). Before long, the outdrive was smoking. I assume the water pump melted down and will need to be replaced, but what else should I inspect/replace when doing the water pump?
I'm also upgrading to a 4" heat exchanger, anything else I should tackle while I am going through this cooling system?