Re: mercruiser 170 overheating
I am having the same problem. However, we are loosing antifreeze out the outdrive. When we put the ear muffs on and ran the boat we noticed when we shut the boat and water off that there was antifreeze on the ground. It is sometimes hard to see if you are only loosing a little bit. We purchased some die and got a black light so we could see where it was leaking and we found nothing. As time went on we did notice that the seal around the exhaust manifold had a few drops of antifreeze on it so we replaced that and we replaced the water hose in the out drive because we noticed it had a kink in it. We also purchased a kit from Napa Auto Parts that allows you to check for fumes to see if you have exhaust coming out of the radiator and we do. We took the heat exchanger out of the boat and had it checked at a radiator shop and it was fine. I have no water in my oil. I do not know what to do next. Good Luck!
