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I feel like the heat is starting in the exhaust manifold but only because that is the first place to get hot. Could there be something obstructing flow through there?
As far as checking the circulation impeller, what I have done was installed a clear tube on the return side of the HX to verify flow and it seemed to have good flow.
I removed the out drive before starting the engine with hose on the hx so the impeller is fine. I know 116 is too cold I was just doing different thing on both engine to gather a frame of reference. I wanted data to compare one engine to the other in a variety of situations. As far as check it...
Ok, I know this has been covered but I haven’t found the thread that can give me the info I need to solve the issue. So here it goes... I had a pair of these engines completely rebuilt, one of which works perfectly. The other however has run hot from the first turn of the key. New riser, new...
