Here it is boys!! GO A LITTLE BIGGER AND SHE WILL IDLE 3 - 3-1/2 MINUTES before starting to load up and will still respond to a sharp throttle movement to save it from dying. AND if you shut it off it will start back up without pulling the plug (A3) to clean it.

INVERTED OS 46LA (as well as upright I would assume)

The 1/16" drill got me started in the right direction but the screw was still backed out past the hole. Sooooo...........

Use a #49 ( .073" ) drill bit and set the screw out 6-1/4 turns. The 1/16" drill was .010" larger than the original opening of .053" so I went another .010" on top of that out to .073" and now the screw is slightly blocking the hole thus actually giving some up/down adjustment. With this arrangement my U CAN DO 3D 46 idles away while sitting still on the runway.

This should cover any instances I can think of as normally it wouldn't be idling that long anyway, on the ground or in the air.

Also I now close the high speed needle as soon as I shut the engine down and re-open it to the previous setting just before starting. This seems to eliminate any starting problems due to flooding.

My opearating temperature was 190-200 degrees F when idling. I didn't Tach it but as long as it is idling and not rolling I am HAPPY. Oh yeah and during my test of these settings my engina ran for 55 minutes. After starting I revved for about 30 seconds the threw it to idle for 2 - 3-1/2 minutes until it started to load up then revved for 30 seconds to a minute to clear then repeated the idle. I did this over and over for 55 minutes and finally shut it off myself and still had a bit of fuel in the plane (8 oz. tank). WOW. That time frame will certainly change during flight but who can stand there staring up for a solid hour anyway.

I believe this motor has had this problem all along I just didn't notice it on the other plane it was on. I think Os needs to check their design and just open that hole up at the factory and maybe so many people wouldn't complain about these motors. The trainer I had this motor on previously was a symmetrical high winged plane with no dihedral and this motor pulled it around great doing knife edges, rolls, loops, and inverted flight. It also never failed to start until I started setting the idle low enough for it to set still on the runway. Just a hair above that and this thing was always great. Now it will be even better.

I am looking forward to getting to the field as this alteration should have increased performance as well. We'll' see.

The plane:

Great Planes U CAN DO 3D 46, with OS 46LA (inverted), 6 servos (2 elevators, 2 ailerons, 1 rudder, 1 throttle), utilizing flaps and ailevator control through the HITEC OPTIC 6 Radio system.