I have a 1986 Bayliner 1950 Open Bow with a Volva Penta AQ 225E engine (GM 305) and 275 outdrive.. I never had an overheating problem before this summer on start-up. There was no water coming out of the two exhaust hoses. I have changed all of the water hoses about 1-1/2 yrs ago as well as a new impeller. I am in the process of putting in a new impeller (waiting for the shipment) just in case the old one was bad.. I noticed the drive (fan) belt was loose and tightened it. It didn't help the problem. Is there something else I should do if the new impeller doesn't solve the problem? Could the thermostat be stuck closed? Suggestions?
