let me ask you this setting the high speed do you allways set to the highes speed you can get? this one has about 1/2 turn between ritch and lean it will slow to the lean at 3 oclock and slow a tad to the rich at 9 oclock i run it at about 11 oclock where noon is the fastest speed the low speed is as sensative if not more at 9 oclock i an ritch with good transition at 3 oclock im lean and smooth as glass but no transition again 11 oclock seems good when hot but when cold forget it 10 oclock works best when cold Granted this has 4 10 min flights on it and im not expecting any better till it has 3-4 gal on it my last 58 was set at the 1 oclock spot and was very smooth and transition was awsome had zero complaints Im sure this one will get there. I know mixture settings have been covered a million times but i thought as you did for years Just fly it silly break in? when im done with a 425hp cat i load it up with gravel and climb the damn hill with it when i get to the top its all set Break in? Ya i change the oil sooner I run it harder than the driver will how els am i to know if he will break it? And no i never ever lost one i built. but this isnt a putty cat or a mack or a navistar i seen a navistar with a valve stuck in the piston on edge that sounded neet.

these settings are relative to the machining of the screw in the engine you are ussing and your engine may not reflect the same clock position but the relationship from rich to lean should be close no mater what time it is. just so no one sets theres at noon and complains to me because we all know engines run better at beer :30