1572,1772 Temperature differance
 

Any ideas why my 1772 runs about 20 degrees cooler (130) than my 1572 (150). I checked the thermostats both are in and working. I used a laser thermometer and checked all around engine, Thermostat housing and radiator and all are about 20 degrees cooler. I also put a thermometer in radiater with same results.

Nice set of supers! What's the model of your other super? Sorry, I can't help on the temp question.

I'd say calcium and rust buildup inside the cooling system. May even be a difference in the radiator build. If the tractors are only running at 130 and 150 it's nothing to worry about anyway. AFAIC, that's a little cool. I like to see water temps of 175-200 (working temp). Too cool a cylinder will wear funny.

The other super is a 1872. Still looking for a 2072

Cool deal, I really like my 1872! :beerchug:

The temperature of the engine should be what the thermostats are rated at. They should not open allowing coolant to circulate through the radiator until they reach that temperature, just allowing coolant circulate through out the engine until they reach that point. Sounds like both are opening a little soon. If you are using the dash gage as a reference they too could not be reading properly. The engine will run better, cleaner, and have more power when up to recommended temperature.

Maybe the radiator in the 1772 is in a little better shape than the 1572. My 1572 ran a little on the hot side. I installed a new thermostat and there was no change in temp. I used a radiator flush and refilled. I also added a little Water Wetter to the radiator and that brought the temp guage down considerably.

What is water wetter?

What's the best way to flush the radiator?

its an antifreeze additive that suppose to lower the coolant temp by a few degrees

http://www.summitracing.com/parts/re...FSqXOgod2FIAPA