I got a ofna Mbx with a Hyper 21 pull start. THe pull start broke so the guy at the hobby shop said no biggie, just take off the pull start and round rod that has a hex on it and you can run it like that, just use a starter box. So i did that, I went so far as taking a rubber plug and super glued it over the hole to keep out any dirt...so i put it on the starter box and it fired up and ran great for about 1/2 tank and then it died...was weird cause this motor has never just died except for out of Nitro. So i checked and it had 1/2 tank left and Now I cant get it to restart.
I took out the glow plug and it lights up bright, I even tried another Glow plug that also lights up bright and it wont start. I have primed the motor a little like i usually do and nothing. just seems like it is dead. Does anyone know what else to check...there is fuel in the fuel line too. Seemed like me covering the hole to the starter maybe messes something but I am not sure...

Let me know your thoughts guys

Ted