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Update, o had a hose kinked in the outdrive, preventing the water to flow. The impeller was fine. Geez what a headache just over a bent over hose.

ok, update. I have alpha one drives. Here are pics of the thermostat housing and the risers. The water intake is definitely coming from the outdrives. Here are pics. It’s overheating only at idle, as soon as I give it throttle it cools right down. The risers are too hot to touch...

Yes, there is a sea cock for both the generator and the engines

New user, my bad

I’m not sure if they are alpha or bravo, I’ll look at my owner manual tomorrow. I know it’s raw water cooled, and the risers in the port side were hot at 145-160degree on the gauge, while the port motor was nice an cool. I’m not sure if the outdrives have the water pump or if it’s in the...

I’m not sure what outdrives they are, I’ll look in my owners manual to see if they are the Alpha or bravo. I looked at the circulation diagram, and it seems the water pump maybe The last mechanic who serviced the boat says the water pump is in the bildge. The risers on the motor were hot to...

Yes, the t stat housing has like four hoses coming out of it.

Thank you for these suggestions. So basically I need to pull it out of the water to have these services performed. Ughhhh. I JSU spend 4500.00 dollars servicing the engines, outdrives, generator, and fixing jelcoat. That sucks, salmon season is just now starting.

i have a 1989 Sea Ray Sundancer 300 Da with Twin Mercruiser 350 motors. Last season I bought this boat. Has about 1500 hrs, now has about 1600 hours on each motor. Ran fine when I first put it on the water. Then all of a sudden the starboard motor started overheating at idle In the...