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Old 07-07-2016, 06:53 PM   #1
Junior Member
Join Date: Jul 2016
Posts: 1
Generac 4700-0 Overheats!

I have classic symptoms- Overheats with load at 100F or higher. I have measured the oil temp sensor with IR gun, shut-off switch fires at exactly 300F, which agrees with sensor rating.

I agree with conclusion before, THE EXHAUST IS TOO CLOSE TO OIL SENSOR! The amount of radiant heat from exhaust is huge. I am thinking that a heat shield needs to exist between exhaust and oil filter/sensor.

BTW, there is a lot of air flow internally, but the air movement near the exhaust /oil filter/ carburetor is minimal. Not sure why- I would expect this to be highest air flow, not lowest. Perhaps there is a problem with internal air seal or clog in intake grate? In any case, the air flow out is good and heat is coming out.
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Old 07-08-2016, 11:27 AM   #2
Head Rambler
Join Date: Mar 2008
Location: Southwest Alabama
Posts: 8,634
Have you thought about trying a piece of the heat shield tape like you find at auto parts stores between the exhaust and sensor?
Salem 29RKSS Pushing a GMC Sierra 2500HD!
Gotta go campin!
Bama Rambler is offline   Reply With Quote

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