77 25 hp evinrude telltale

[tdr9499]

at idle the water coming out of the telltale is cool but once i run the boat for about five minutes the water is extemely hot to the touch and when i dip water on the block it steams. i have replaced the thermostat and the impeller. any suggestions here to look next. these does not sound right to me!!!!!!!!!!!!!

 

[OBJ]

Re: 77 25 hp evinrude telltale

Hi ya' doin TDR? Not good from the sound of it.<br /><br />This a salt water boat? Sounds like some major pluggage in the block some where. I think first thing to do is would be to pull the t-stat and hook up to flushettes in the drive way and let her flush on fresh water for a while. You may want to leave the t-stat cover off and start her up just to see if you get a good flow from the hole. If ya' do, put the cover back on and see if the engine overheats. Could be ya' got hold of a bad "new" t-stat.<br /><br />Keep us posted....thanks.

 

[R.Johnson]

Re: 77 25 hp evinrude telltale

You are probably going to have to back track here! On a 1977 engine you should have replaced the entire pump assembly, not just the impeller. The pump housing, and impeller plate are probably badly grooved, and need replacement.