Hello all! I'm trying to break in my first glow engine, A Tower .46. In the manual it says to "pinch" the fuel line and the engine should pick up speed, I was just wondering what a "pinch" is? am I to completely pinch off the fuel quickly, or just squeeze to reduce flow? Ive been trying a full pinch but every time the engine just dies shortly thereafter.

Any help is appreciated

Cheers,
Derek