skyblue

Having much trouble getting my Mag 120 4S to draw fuel from the tank. The fill line to the tank is connected to the carb and I can push fuel out of the tank by blowing in the vent line. The carb is also clear where fuel will easly flow thur it. The engine is mounted upright on a test stand.
I can get the engine to fire up ( on the first flip no less) if I squirt some fuel into the carb but it will only burn the prime and not draw any fuel from the tank.I tried to openup the low speed needle but still no luck. Any ideas ? Phil

MinnFlyer

My Feedback: (4)

Open the High Speed needle - That's the one that you should be adjusting

frenchie79

Needle valve for sure & make sure the tank is somewhat level with the carb.

skyblue

I opened the high end as much as 5 turns but still no luck.

MinnFlyer

My Feedback: (4)

If you like, I will move this to the "Glow Engine" forum. Maybe some of our gurus there can give you a better answer.

jay2000dakota

Try removing the high speed needle and blow some fuel through it to clean it out, then try the same thing with the low speed. If that doesn't work pull the carb off and soak it in fuel for a couple days

skyblue

Thanks guys for your replys. It turned out the factory low speed needle valve was set wrong at the factory. I reset it to the factory specs and everything is a ok.