YS63 running lean on top end
07-01-2002, 05:43 PM
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YS63 running lean on top end
I have great results with the ys 63 and it is my 6th ys motor But yesterday it started running lean on the top end and will not richen up even if turning high speed needle out all the way. I havent really had time to mess with it but would request some possible reasons, I know all the obvious like obstructions in line hole in the fuel lines b ut what about fuel regulator valve ect. I use strictly sig 25% nitro heli fuel 24% oil.
