Ok I had to send back my mach to losi and they replaced it because of a broken washer anay way I'm trying to break the new one in w/ my the carb from the other engine, and its making a fluttering noise and getting about 200 at 4 1/2 turns out I seen bubbles in the line and pulled it from the carb and there was no fuel in the line I tried a savage tank and same thing its not taking fuel into the carb and its staying running that many turns out!!!