I have about 35 flights on a Saito 1.25 powered Fusion. I have been having trouble getting it sorted out. It will harrier along about 1/3 throttle. While pulling the plane along the mix looks way rich. You can see the smoke in turbulence behind the wing, it's so thick. Not being an expert I was never sure if the rich setting was on the high or the low end. I did know I could not find the sweet spot. If I leaned the low end even 1/16 of a turn, it would not start. If it did start it would die when I tried to advance the throttle. My Saito experience told me this was too lean. If I leaned the high end any it would occasionally die or stumble when I hammered the throttle to do a pinwheel or a waterfall. Even so it still looked way rich at certain throttle settings. So yesterday I pulled the plug to look at it. It looked normal till I put the hot shot on it. The last 2-1/2 coils at the piston end did not glow. Maybe this is how they always go bad? Anyway after that long description, I put a new OS "F" in it and retuned it. I can't remember the last time the engine pulled that hard.

I'm not new to glow flying. I have been doing it 19 years now. I just can't ever remember a glow plug acting this way. Most plugs I haved changed either would not fire, or I changed them trying to chase down a problem. Anyway, it was interesting to me.

David