I've got a slightly used O.S 91 FX and I've been trying to work the bugs out of it.....maybe someone can help me out......It starts very easy and idles great...but when I get to about half throttle going to max throttle it starts to die and the only way to keep it running is to move the throttle back and forth from idle to max then it starts to kick into full power slowly.....I've adjusted to needle valve and the results were not much better. I'm swiningin or attempting to swing a 14x6 prop. Can anyone help...
Thanks
Shogun[&o]