ORIGINAL: chris8105
Anybody have any problems with the 91fx and the bisson pitts muffler? I took it down to the field today and it acted like there wasnt enough back pressure from the exhaust to the tank. Turning the high end needle did nothing.
That is the same set up I have run for the last 2 years and just started to have that problem with mine. I haven't had a chance to check it out yet... I figured I had an exaust leak or fuel line leak... Any how acted like I was getting air from somewhere. No matter how much I turned the high it didn't seem to change.