Hey Baxter,

I agree with everything you just wrote. I differ a bit from you. I will use a smaller than normal prop for break in. Say on a 60 I'll use an 11x7 cut to 10 inches. It will run at a reasonably high rpm but being very rich won't overheat. I usually do a series of 5 minute runs getting leaner each time until I use the 11x7 and the engine will hold a two cyclew without sagging. Thing I fly it still a bit rich until it haa about a half hour on it. That's how I break in most ringed glow engines.