RE: Seagull Edge 540 with Saito 91 .. problems!
Poweraster 15% Nitro 18% oil , syn/castor.... also have Magnum and OS four strokes and one other Saito 65 using same fuel... could the valves be off enough to drain power out put on this engine?
Inverted and hard to start unless open throttle to about 1/2....Balanced as Seagull recommended and does not seem to be nose heavy... if anything a little tail heavy like a lot of 3D airplanes...