flyrotary@lancaironline.net Mailing List Archive

Temps sound fishy. 200 deg. CHT - F or C ?... Tracy Sent from my iPad > On Mar 18, 2014, at 9:59, dlomheim@aol.com wrote: > > 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! > Sent on the Sprint® Now Network from my BlackBerry® > -- > Homepage: http://www.flyrotary.com/ > Archive and UnSub: http://mail.lancaironline.net:81/lists/flyrotary/List.html