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Water temps and CHT temps

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Posted

Why is the water temp range so much lower than the CHT "green arc"?

Water temps should be 175 max

CHT is 230-270 with 300 max.

My water temps and CHT are nearly equal which I expect them to be. But my water temps are on the high side, but my CHT is not even close to the "green arc" of 230-270???

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Posted

The cylinder head temp uses the ring probe under the spark plug. No water right there and that's where the big fire is.. So the head temp at the plug is higher than water temp.

Water temp is 180 max from rotax, but I have seen it published that momentary temps of 200 are ok.

:BC:

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Posted

Makes sense. Which is more important? If I only had a cht, I wouldnt be sweating, but watching my water temps press 180, I'm hot!

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Posted

Water temp.... If water temp is ok then cht is going to be fine.

:BC:

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