[Rongripon]

Tom and Ashley, thanks for the input.

I'll check the volume of air coming out under it.  Coolant is nice and green... so leads me to think radiator is probably ok. But I know that isn't a guarantee.  Do you know what temp it should be shutting itself off at?

Ashley, I don't know how ground problems on guage affects it. But let me see if I understand. With a ground problem it could read at a normal expected range while not driving.  But it would go up drastically when driving?  (I am assuming somehow a slight increase in temperature would be exaggerated on the temperature guage??)

Thanks!
Alan

Alan, two years ago i was having a similar problem. several things were done; I change the blower motor for the gen radiator to a 3/4 HP. when I removed the old blower I found an air flow limiter and I removed to increase the air flow. also, i flushed the coolant system and I found a leak, although small, in the radiator. I pulled the radiator, had it rebuilt and made sure good coolant flow was there. The other thing was to install 120 vac pump in the return line to the engine on the genset. That really helped a lot..

If the temp gets about 195 degrees, in my case, the fire suppression system will be activated. the ground issue is probably making it intermittent on the  temp gauge..  right now, the gen is completely remove to fix several things. normally in a loaded condition it runs about 165 degrees.

Gordon is your man. 

Ron