Water temp issues

[Agent banks]

So I replaced the impeller and now when at idle boat gets hot/ 2001 San gt-40 however when running a moderate or pulling speed it stay in the 160's. what's going on now? At least it's running.

[Chexi]

So I replaced the impeller and now when at idle boat gets hot/ 2001 San gt-40 however when running a moderate or pulling speed it stay in the 160's. what's going on now? At least it's running.

Did old impeller come out in one piece? I have heard of your symptoms when there is a partial blockage In The cooling system.

[Agent banks]

Yea it was missing little pieces. I'm having trouble getting the thermostat Allen bolts off its like they where installed with lock tight . But I think I. Have a few pieces caught in the thermostat

[Andy]

Check down stream from impeller in the hoses up to t-stat. When you get the t-stat off be sure to have a new gasket on hand when you put it back together. Also make sure you have the hose clamps are tight.

[peteb]

Work from the impeller back to the fresh water intake. First you need to install a new impeller. When I de- winterize mine I pull of the hose from the fresh water intake and stick it in a 5 gallon bucket of water and have a garden hose with a valve fill the bucket as much as it sucks while idle. Make sure it's sucking good at idle. You should feel it suck your fingers when you feel the end of the hose in the bucket. Take all of the hoses off prior from your water pump to the oil cooler then cooler to the fresh water strainer and then after the strainer. Make sure the soft metal on your oil cooler hose ends isn't bent in to where you might be sucking air at idle due to a crimp in the cooler how's fitting. Reassemble all hoses and make sure clamps are tight. Fill the fresh water strainer full of water prior to starting once you've checked everything. Hopefully that helps. I always suck water from a bucket instead of a garden hose directly attached to the water hoses that I used to do. Let me know of that helps.

[Agent banks]

We're all good now. It still gets around 200 at Ike after long time. But I take a while. Bu no check engine light and she runs strong.