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I need some help. I have a 78' 85hp Evinrude that is overheating. I was still getting water from the Tell Tale, but the overheating horn was sounding. The water from the telltale was hot to the touch, so I figured it was a Thermostat issue. I replace the thermostats and now I still have the issue.
I used a infared thermometer and the left side was getting around 200 degrees and the right side was 160 degrees. I only ran the motor for a few minutes before the temp was this high, the horn went off, and I shut it down.
I then removed the hoses that feed the thermostat housing and verified water was coming through the cyclinders on both sides, but the motor still had the same temperature characteristic as listed above.
What is my next troubleshooting step? I changed the waterpump last year and the water seems to be strong out of the tell tale. I am not sure how much water should be coming out of the hose to the thermostat, but it is coming out with about 1/2" of pressure.
Should I be checking for blockage? Could it still be the waterpump/impeller? Not sure where to go next.
Thank you,
Ben
I used a infared thermometer and the left side was getting around 200 degrees and the right side was 160 degrees. I only ran the motor for a few minutes before the temp was this high, the horn went off, and I shut it down.
I then removed the hoses that feed the thermostat housing and verified water was coming through the cyclinders on both sides, but the motor still had the same temperature characteristic as listed above.
What is my next troubleshooting step? I changed the waterpump last year and the water seems to be strong out of the tell tale. I am not sure how much water should be coming out of the hose to the thermostat, but it is coming out with about 1/2" of pressure.
Should I be checking for blockage? Could it still be the waterpump/impeller? Not sure where to go next.
Thank you,
Ben
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