RE: It wants to fly backwards. Problem Solved!
Sounds like the field needs some skull-and-crossbones No Trespassing signs at its perimeter...seriously. I argued with a guy who was flying a kite with his grandson... "Sir - this is private property." "Sonny - it's a big field." "Sir - if a plane hits you or your grandson, at minimum you'll have to go to the hospital." "Son - I'm gonna fly this kite." "Sir - I mean you'll DIE if one of these hits you." "THAT'S IT, SON - you can't talk like that in front of my innocent grandson. I'm calling the police." "Thank you, Sir - I don't have a cellphone. When they get here, tell them to come see me."
*grin* The soul of politeness. The police helped him off the property. He was flying the kite over the local power wires, too.........woulda died one way or the other. Maybe from skull implosion - obviously had nothing in there...the vacuum would've killed him.
I was a little confused...let's talk 'in' and 'out' instead of 'lean' and 'rich'. First start - prime by opening the carb, hand-twisting the prop and stopping when the fuel reaches the carb. Start. (Notice there was no ifs in that statement *grin*). Open the throttle all the way - turn the needle valve IN, listening to the engine get leaner and increase in RPM until the RPM's sag. Restore the RPM's by turning the valve OUT, then maybe one more click OUT to ensure a slightly-rich setting. That's it.....done. What prop are you using? I used everything from a 10x4,5,6 and 7 to 11x3,4,5.
Fuel - I used 10% nitro, never worrying about oil content, all summer. If it was on the LHS shelf, I'd use it. During the winter I'd go to 15% nitro. And, when pumping the tank dry, I'd pump it right back into the can - screw it. I DID always use a filter on the pump line - so whatever crap started in the can would stay in the can when I reverse-pumped the fuel back into it.
Run the engine dry at the end of flying - simply pop the line off the carb... Then empty the tank with the pump.