Mercruiser Heat Exchanger please read. There was no leaks or anything when this was taken off. I decided to open it up and clean it to make sure it was still good. There is some corrosion and green on it as you can see. Normal wear for copper and brass. But the two end caps I think we'll need replacing along with the rubber gaskets. Some of the inlet hoses are out of round. As you can see by the pictures. But like I said there is no leaks. When taken off. This will definitely need cleaning to your standards I'm sure. Please ask any questions and make sure this will fit your application before you buy. Sold as you see it. Check out my other listings on eBay. Thank you