I have a 3w 80xi that has never run right. Let me start out by saying... i recently put a new carb on it(from aircraft intl.), i recently over hauled it and put a new ring in it, new bearings, and decarbonized the motor. i also installed a new rcxcell ignition a few days ago. i get about 6350 rpm with a 26x10 mezjlik prop...so the top end numbers are ok. it idles fine on the ground. i have the low end set just right in my opinion. any leaner and it will bog when i throttle it up. here is what the problem is the motor idles fine on the ground, but when it comes time for me to land, the engine takes too long to idle down. i have to go wayyy out to bleed off enough airspeed to land and to give it time for the idle to come down, or i have to go around and lower it a couple of clicks to finally get it to idle down...and by the time i get it the ground the idle just fizzles out and the engine dies. it happened three times in a row today. some one told me the low end might be lean... so i richened it about a 1/4 turn or so, to where the mid range was thick and burblely. same thing happened.

i have ruled out just about everything i could... new carb, overhauled the engine, new ignition...whats left, the timing? not that it would matter, im also using stihl hp ultra 40:1 lol