Muz

I need help. I have a Magnum GP 10 in a R/C car. It starts and idles ok and will idle for a whole tank of fuel. The problem is that when I accelerate it will run at full throttle for 10-20 seconds and then slowly the revs decreases and it stalls. I have no idea what to do. Tried to take it to the local hobbie shop but they are unable to look at it.

Muz

kt racing

The engine is to lean on the top end. You need to richen it up. Or you could possible have an air leak on the car. Either motor, tank, or fuel line. I would recommend trying to richen up the top end needle and if that doesn't fix it pressure test the tank and tubing. Then take the motor off and air seal it. Hope that helps.
keith