why does my Idle Needle need to be set so Lean ??
Baxter, on my 61Fx the Idle Needle is not even 1 turn open, I would say it's about 75% to 80% of 1 turn open,
could it be because the SlimLine Pitts is so restricting of the exhaust ? I ask about the muffler because it will only spin to 11,800 tuned for flight with an APC 11X8,
fuel is Magnum Plane 15% Nitro, plug is the OS 8,
it will idle great at about 2,400,, it will set and idle for maybe a half minute and not sputter when advancing to full throttle, but idling any longer than that she will sputter badly when advancing to full throttle,,, tuning it richer or leaner doesn't help,
my engine has had about 7 gallons burned threw it and it has very good compression, never flown lean
thanks Baxter !!
Jim