the engine is about 5 yrs old, but piston and ring and don't know what else was replaced because of a defect. this was done in chezh.
ignition is a vlach electronic ignition EZM 1 TI
Using 93 octane gasoline with Klotz 2 stroke oil at 1:50 ratio. synthetic with castor
Muffler is a Bisson
engine is on the plane, and has the problem both in flight and on the ground.
needles are set at 2 1/4 turns on the high end needle and 1 3/4 turns on the low end needle
i do not know if front seal is lubricated, how can i tell?
vacuum pulse connection to the carb is ok.
seems like when i turn engine off it takes a good while before you can keep your hand on the engine crank case.
battery voltage stable
plane failsafe is set off.