Ok just wat I said. I have the Mach .15 RE on my XXX_NT. Somthings wrong wit it. I would call them but.... Our hours are from......Ok so the engine starts with the roto start BUT It wont stay running and it revs high but doesnt move the car. I noticed that I can move the freewheel all ways and doesnt turn over the eingine....WOW PROBLEM. What do you think is wrong. I called the local hobby shop and he said "I dunno what to tell you" well dam. I bought a TRX .15 4 40 bucks but the mounts dont work cause the pilot shaft is TO ****ING SHORT AAAHHHHHHHHh. BTW the pilot shaft on the Mach will turn over the engine just not the flywheel. Looked in the case and all looks fine. Any help would be greatly appreciated.