.049 tuning

I start about 2½ to 3 turns out and I prime at the exhaust port to get it going. Once it's running begin to screw the mixture needle in about 1/8 turn at a time. Wait a few seconds each time to allow the revs to stabilize. Continue until the engine is screaming at max revs. If you screw the needle in and the engine slows then you've gone past the "sweet" spot and it's begun to run too lean - back it out again to achieve max revs. From the point of max revs back out the needle (enrich the mixture) about 1/8 turn and that's it. Running the engine just that wee bit rich is a little bit of insurance against overheating and seizing, but without too much power loss.

Happy Coxing
Dins

Either I can't count or something is odd,

I am usually 4 1/2 turns out to start with Sig Champion 25% nitro.

My 15% nitro Omega with added castor I am closer to 3 1/2 turns out.

Phil

Mine are all over the place. The needle shape and all sorts of differences affect it. I just try to remember where it is for which one Just one of the reasons Cox tanked Bees are lovingly...sometimes... known as finicky. Remote tanked engines are much less persnickity.

Thanks guy's

I kind of know what to do from using my nitro rc's from all the years just wanted to see how you guy's did it.