ORIGINAL: gaRCfield
ORIGINAL: xcanadamanx
you dont happen to have an idle stop screw on your carb do you? i had the exact same thing happen to me a few weeks ago. my idle stop screw fell out and there was a huge air leak from it. if you normally have one check if it is there... if not that may be your problem.
I don't think I've ever had one.
With a 46AX you don't have one.
http://manuals.hobbico.com/osm/46ax-manual.pdf page 28 is your carb
Item #8 are the carb mounting screws. If one is loose or missing air will leak in.
Item #5 is your rotor guide. In some carbs this also can function as a throttle stop. If missing-big trouble.
Item #7 is the o-ring. If the carb is not seated on this fully you can leak air. It can also be cut and therefore bad.