Leak of Pipe Air Leak

[Tom]

Aslong as the leak off pipe is the right size it will be ok. I dont know about sizes i just asked motor factors for leak off pipe and it worked fine. Have you got a cap on one end of the leak off circuit? It does sound you have an airleak. Are you having trouble starting? Use your ear and pump the grenade and listen for where air comes out, i know if i squeeze mine i can hear a little leak from the throttle shaft. Also a picture of your leak off would help, there might be an obvious problem that someone else spots that you didnt notice, no offense to you its called a second set of eyes :p