RE: 4-stroke engine for pattern
That really is surprising. The OS 1.40RX is one of the easiest engines to get running correctly. All of the ones I had were sweet hearts. I will say I'm not a fan of the Byron fuels for it as I don't think their lubricants are as good as some of the others, but it should still run OK. Prop it light with a 17X12 and go fly. What are the problems you are having making it run?
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