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Old 03-22-2018, 05:13 AM
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ben beyer
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Default YS 63S Surges Above Half Throttle

I have a YS 63S that I bought used a while back and it was running fine. Recently it only runs fine below half throttle. Once I get to half throttle the engine starts slowing down like it is running out of fuel and then speeds back up when I get to half throttle.

Any ideas of what could be wrong?

I thought maybe it was the fuel tank so I hooked it up to a Tettra and it's still doing it. There is pressure in the tank after running.

Fuel is Ritch's Brew 20/20.