actually no, it was the coil, like i said, i replaced the DIAPHRAM and it still did it, i changed the coil and it did it no more, this thread is very old and the problem has been solved, by me. oh yeah forgot to state this, the diaprahm was not folded, matter of fact i made sure of that. i put it on correctly and it still did the same thing, never went back into the carb now, and i just tried another coil because it was spitting and sputtering and then dying like it had no spark. i put another coil on it and it has never done the same thing again, no sputtering or nothing. its a classic, yeah its only 5 years old. i like i stated above was looking for more possibility's to what may be causing a gas problem to it. after putting a new diaprahm and taking the carb apart and rebuilding it, it still did it till i put a magnetron coil on it. i rebuild engines and i rebuild carbs, just it had me stumped because it all led to a gas problem. but it started cutting out like it lost spark before i changed the diaprahm, actually the old diaprahm was still good, i used that on another 3.5 i had and that would still run if i didn't break that crappy plastic carb.