Is it possible the spark plugs are fouling on the taxi out from cold engine? Mine started few weeks ago when it got cold. And it tests properly in flight. 80 RPM drop. Iím going to print off the carb section of the heavy maintenance manual to learn.
You just got yours back from Lockwood so they seem like they would be in perfect condition. Is it possible to adjust the lean/rich mixture for the taxi out?
Right now I think my plugs are fouling. But I donít know for sure.