My hpi t-15 engine wont start i got a good glow plug, i charged the glow ignitor, the roto start is charged, and im not sure whats causing the problem i mean all i did to the engine was put a new exaust gasket in it, a gasket for the engine like wear the piston is underneath the head and i jus put a fuel filter im sure none of these is causing the problem i guess my engine is worn out or something i had it for 2 months and i been leaning it out sometimes

If it was running before you did the gasket job, it is obvious that you disturbed something while you were working on it. Recheck the glow plug, linkage etc. Also, make sure it's getting fuel, perhaps your new fuel filter is in backwards, or is somehow blocking the fuel flow. Like I said, if it was running before, you'll figure it out and get it running again.
Jag

your fuel filter can be backwords? i didn't know that well i think its lost compression cuz its kinda easy to turn the flywheel

Maybe try and contact HPI if you can't get any other help here.

nvmd i finally started it i think jagzilla was rite well thnx anywayz im jus gonna go ahead and buy a hpi .18ss like in a month or two