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