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YS 2 stroke w regulator

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Old 05-15-2008, 10:02 AM
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Texan2
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Default YS 2 stroke w regulator

[]Does anyone know the procedure in adjusting a ys 61 2 stroke with regulator. I have one that came mounted on a Combat Models F-16. Once I began to decrease throttle for landing, I'm committed because any attempt to throttle up kills the engine. It will often die after taxi out upon attempts to throttle up, requiring re-start. If I blow the engine out at high trottle then take off immediately, I'm OK. If I throttle down, I'd better be ready to land.

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Old 05-20-2008, 02:42 AM
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Tommygun
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Default RE: YS 2 stroke w regulator

This particular engine does not have a low speed needle, if it's the one I think you're talking about. It sounds to me as if the regulator is too rich, (pumping too much fuel) and it's loading up in the idle, then when you punch it it bogs and dies. So you need to lean out the regulator. I want to say you turn it OUT to lean, IN to rich, but test it to make sure. You only want to move that regulator not even 1/8 turn at a time though, since tiny movements make big changes. Is the screw flush with the regulator body? That's what everyone says is the starting point. The vintage pattern guys really know these engines, if you have more trouble with it then they're your "go to" guys. But try adjusting that regulator on the ground, if after idle you accelerate, it coughs and smokes, you know you're rich.
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