You could also drill out the air bleed hole slightly. Ive seen that work well sometimes on these types of engines.

I notice in a different thread that you asked the same questions 4 months ago, and got exactly the same answers that you got here. My question is did you try any of these suggestions over the last four months?

Here the original thread posted by Mr. Jorgensen: http://www.rcuniverse.com/showthread...552#post875400

the best response given 4 months ago came from Matt Kirsch:

SNIP

OS LA engines have airbleed carburetors. The adjustment of the low speed is very similar, except you turn the airbleed screw in the OPPOSITE direction you would turn a low speed mixture screw.

Airbleed carburetors control the idle mixture by regulating the amount of air that enters through that tiny hole in the front of the carburetor. The screw on the right side of the carbuertor is what controls the size of the opening.

Let the plane idle for a good 10-count, then quickly firewall the throttle. If the engine dies or hesitates, turn the airbleed screw IN 1/4 of a turn. If the engine blubbers and smokes, turn the airbleed screw OUT 1/4 of a turn. Airbleed screws are much less sensitive to adjustments than idle mixture screws, so you need to move them more to see any results.

While you may not get an airbleed carburetor to ever transition perfectly, you should be able to get a reasonable transition out of it. If you find that you have completely turned the airbleed screw out of the airbleed hole, and the plane still blubbers when you shove the throttle ahead, disassemble the carburetor and drill out the airbleed hole with the next size larger numbered drill bit. 1/64" or 1/32" of an inch may be too much, which is why you need the numbered drill bits.

END SNIPP