I have been working on a boat I got. It would always over heat. I replaced the thermostat and back flushed the cooling system. Yet it still was overheating on me. I believe the problem is that the hoses are hooked up wrong to the thermostat housing. Took them off and did some switching and had no issues with over heating, but I couldn't get any water flow to the beginning of the exhaust manifold. I could really use some help finding a picture or diagram of the cooling system. The engine is a ford 225 small block v8. Please help-I would like to get my boat out to do a open water test before the end of the season. Any more info you need I can provide. Thanks.