I just finished fighting with it, before checking this thread. It would run on pure glow (after I'd pour some into the cylinder) and die, over and over again. I pulled the plug and it had some weird gunk on the coil. I don't even know how to describe it, it looked like a piece of sand or something but wasn't. It was pretty hard. That was my only four stroke plug, too Put a Fox two stroke plug in it, with idle bar, and after priming it with glow about five times (it would run and die) I juiced the control panel to get it in the "red zone" on the glow power meter and it started (also after fiddling with the needles for about 10 minutes). It ran at full throttle and it ran without the glow starter but lowering the throttle = death. It also missed sometimes.

I also fought with my silly tach, man that thing was annoying. Does your engine have to be sitting in bright sunlight? It was partly cloudy but the sun was out, I was in the shade of a tree. Took me FOREVER to get a reading on the tach, looks to be about 6600 rpm with a 1680 Master Airscrew prop. Kinda disappointing, perhaps I'll get better with a hot four stroke plug.

Any ideas of what the stuff on the plug coil was? It wasn't the white buildup most people have, I really don't know how to describe it besides it had the color of sand and was pretty hard. I'm considering taking the engine completely apart and cleaning everything, just in case. Nothing floating in the gas tank, don't think the gas is old. Also, there seems to be black soot on the glow plug idle bar after one tank.

I don't suppose any of you guys live around Knoxville, TN do ya? Nobody around here that I know of even knew of gas/glow.