Good idea to test the calibration of the CHT gauge but even if you see 210 when in boiling water, the gauge is probably wrong when installed on the engine. Any air cooled engine making enough power to fly WILL be well over 200 F.
BTW, what was the oil temp running?
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Tracy:
The CHT gauge is in "F" and not "C". I would have expected it to be
running at least at 300-325 deg. This weekend I'll haul my gas
grill out by the a/c and boil some water and put the sender in it and see if
it's at about 210 or so...
Jeff:
You are correct that the "D2" and "D2A" are both set at 18 degrees BTDC;
but my documents show the straight "D" model should be set at 25 degrees
BTDC...so my 28 degrees is above that a bit, and I will probably retard it
slightly and see that changes things at all. I also will confirm
valve clearance before my next flight since this engine doesn't have
hydraulic lifters...
Doug
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