2010 SN 200 overheating at idle

[chipkimball]

Hey SN tech gurus - wold love some help. I have a 2010 SN 200 with the EX 343 engine. We have run into an overheating problem when the boat is idling, even for a short period of time. When the boat is up to speed - say fater than 20MPH, it cools right down and runs normally. Changes the impeller just in case, it was fine. Seems that if we had a clog, we would have overheating at any speed. Any ideas on trouble shooting this?

[Lwalker]

What are the temps at idle and at speed? I would look at the thermostat next.

[j2nh]

I would be looking for an air leak. Spinning the impeller faster might overcome the leak. Check hose clamps on the suction side, check the gasket on the strainer.

[chipkimball]

Thanks for the suggestions. Turns out the strainer platic had a hard to see crack (along the thread line) and when I replaced that part, everything now works fine. Everyone's help is much appreciated!!! Problem solved.