I have finally finished the restoration of an RV-3A that sat for 12+yrs in a hanger here in OK.  After to flights now I have two engine issues I'd love to have some feedback on from the smart engine guys on the list!  I'm running an O-290G that has been modified to a "D" config. Minus the crankshaft.  The airboat guys run this engine w/the timing at 28 deg. (Vs 26 deg) BTDC and it has the original Marvel 3A carb that it flew w/for it's first 150 hrs.  My two big issues are the EGT is constantly redlined at RPMs above 2300.  I attempted leaning it on the last flight, and it didn't drop the temps at all.  Additionally, the CHT has never hit more than 200 degrees and it has a sparkplug sender which I have read should read about 40 higher than actual if using a bayonet style in the cylinder barrel.  Anyway, I need to verify the temp calibration of the gauges, but I wonder if there is something on the spark / timing side I also should consider here as I trouble-shoot it further...
Thx for any ideas!  

Doug Lomheim
RV-3A flying!
RV-9A w/13B ready for some attention this Summer!
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