The nitro is at 10% with 29% caster oil, I back the needle out until it is about to 4 cycle It does lean out in the air. I've never had an engine act like this one does. It has reasonable compression and good rpm. Today I got a couple of flights out of it, but I was not pleased with the way the engine ran. I will spend some time in the next few days trying to find out what is wrong with the engine. It will run with a cold plug, but not with a hot plug. I've had Enya's that needed cold plugs but this is the first K & B Stallion that I've owned that wouldn't work with a hot plug. I am going to order more plugs, I think I will order O S #3 and #8 and some kind of a cold plug and test them all out.

Ive had a good bit of feedback between here and another forum so I think I will waite until I get new plugs and try some different fuels I have 10% nitro with 29% caster oil, and I have 10% with 20% mixed blend I also have much hotter fuels 25% and 40% but I won't run anything more that 10% to 15%. If this engine continues to be a problem I will retire it and go on to a different engine.

Thanks for the help