excell/g23

[NU2FLY]

Hello
New to forum. Any info would be appreciated. Back in 1995 I built this gasser. Only learned to hover that year and then retired it for some unknown reason. Well I just blew off the dust and began hovering again. After a few tanks the engine seemed to lose power. I could get it to idle fine but when raised the the throttle the engine would bog down. Could this be due to cleaning the carb with carb cleaner.
Thanks again..

[cbergen]

There is a screen in the carb that can get gummed up. Remove the plate opposite the pump bulb, carefully remove the gaskets, and clean with fresh gas. The screen is about the size of a pencil eraser.

Other than that, tuning :D

[NU2FLY]

There is a screen in the carb that can get gummed up. Remove the plate opposite the pump bulb, carefully remove the gaskets, and clean with fresh gas. The screen is about the size of a pencil eraser.

Other than that, tuning :D

Thanks for the info. I tried that and found some gunk in there but did not solve problem. It seems the longer I hover the worse the motor runs. when I set the heli down and allow it to idle for a second or two then power back up it seems ok for twenty seconds then begins to lose power. could there be a heat issue or coil problem?

Thanks again..

[Waller]

Sounds like you're lean...

What are your needles currently at?

[NU2FLY]

Sounds like you're lean...

What are your needles currently at?

1-1/4Low
1/4High

[Waller]

Should be close; I'd go 1 1/2 on both just to make sure you are on the rich side.

Also check to see that at hover you have about 5 degrees of pitch and about 40 percent on the throttle to make sure your headspeed is close.

[cbergen]

Did I read that right? 1/4 on the high?

On the G23 with the walbro 167 carbs, we use 7/8 to 1 on the low, 1 1/8 to 1 1/4 on the high.

[Waller]

I misread and assumed 1 1/4 on the high; if it is 1/4 you're way lean!

[bigrcr]

If that is the case (at 1/4 open on high needle), you will idle and go up to transition OK. Then as you get to the transition point (where the high needle starts to come in to mix with the low needle) you get lean. Then as you go to wider throttle (more open) the already hot motor shuts down completely from lack of fuel. Open the needles up to the rich side so that when you advance throttle, the motor stumbles and work back from there to a good mixture. Doing this mostly ensures that you don't get the motor too hot as you make it richer (starting from a leaner condition on needle setting). This will cause the needles to never be set correctly for when you find "the sweet spot" at that moment, the motor will not be at it's correct temperature and will be needled for a hotter motor condition. This will make the mixtures off again next flight.

Hope this makes sense! :crazy

[NU2FLY]

Hope this makes sense! :crazy[/quote]

Thanks to all I appreciate all the info. I will give it a try this weekend if it does not rain.