mine warms to just short of 140, then drops to 118 then rises to 129 and controls between 118 and 129 with the thermostat opening and closing, noticed it today when flushing. cant help any further with what you have described
Originally Posted by LURCHER
I have been having overheat warnings come up on my 150 Opti when revs are below 2500 as soon as rev go above this the temp starts to fall away rapidly . I had a new impellor fitted in the spring and have noticed the tell tale is not as stong as before however water pressure shown on Smartgauges is at 39 psi which is what it always has been . Any ideas ?