I am running an OS61SF max on a TT fun fly extra. I got it used. The low speed needle is adjusted by an eccentric screw moving a fork. The fork was upside down (I think). There is a crescent cut out on the closed end of the fork. Does that face the high spd needle valve?
I replaced the needle which was broken off flat. I use a pitts muffler, and cannot seem to get a smoke trail, even when it seems too rich.
Oh, I am running a 11x7.5 prop. I posted in fun fly to ask if that is enough prop.
Thanks,
Tom