My buddy and i bought the MGT at the same time we broke the motors in as the book said and it ran great. for a week i broke mine in with blue thunder fuel he did his with o'donnels, when we ran out i bought us both some traxxes fuel. they ran great for half the gallon then one day they wouldnt shift into 2nd gear but it would shift in reverse. but it ran balls out when it was about to run out of fuel. so we changed fuel again we both went back to o'donnels they ran great for a day then same thing happened so finally i went back to blue thunder and the same thing we have been threw dozens of glow plugs we tuned to no end and we even changed the fuel line thinking there might be a leak. im getting really mad i didnt shell out $600 to look at it on my shop table

so long story short its hard to start wont shift into 2nd runs like its bogging sometimes then when its just about to run out of fuel it runs great for 5 seconds has anyone else had this problem please help

engine is to rich

yup yup.... when it gets close to running out, it runs leaner, due to tank pressure changes. Richen up the high end a little, and call me in the morning.. hehehe.. J/K..

I had a very similar problem.... (OK identical problem)

You say you changed the fuel tubing when you were looking for air leaks... i think that is the problem. The MGT comes with a larger bore tubing than "the regular stuff". I swapped to some smaller bore fuel tubing before i realised this and the engine ran aufully. Replace the original fuel tubing, or get some of the "big bore" stuff (the big bore tubing is slightly bigger than stock so you will need to use fuel line clips to hold the tubing onto the fuel nipples. It will be difficult getting the larger bore tubing into the pipe (as it doesnt have a nipple) but it will go.

It is something to do with fuel flow and backpressure. Dont ask me why, but it is. Switched back to larger bore tubing and the engine runs perfectly.

lean it out bro, what % nitro ya usin

I broke mine in with a gallon of high oil content 15% (cool power), now I use a byron 25%. I have ZERO problems and it runs liike a stud even when I run it safe and fat (210")

as for the stock fuel line i had no problems with it, changed it because I bought some fancy red stuff for shock stops and had extra, so i plumbed the motor

I would reccomend a head though, the stock one is a little on the small side