Hey i have a trx 2.5 and it will not start even with pull start i kill a 7.2 volt batery on the ez start i had the same problome before on this enngine and it was a hole in the case put in some jb weld and spins great but will not fire and will not pump fuel even with the exhaust portthanks in advance.
Then you are leaking the pressure elsewhere.
Holes in the case are best fixed by replacing the case.
No fuel to the carb means no fuel into the engine, find the leak & you'll find the problem.
Look out for the tree/crunch!
LiPo? Naw NITRO!!
the engine is getting fuel by me from fuel bottel