ORIGINAL: Eagle Flyer
What I did find was that if I kept the glow drive higher than the green on the meter, about 4 amperes, it worked a lot better. Green quits about at 3.5. And if i went to 4.5 it was better still.
That's weired. I mean my OS F takes only 2.2A from 1.2 NiMh. It is between 1V and 1.2V. You run your plug much hotter - it must be glowing like a light bulb.
I'm affraid that the 'timing' for glow is different on each type of engine. I haven't play with different engines - just Poulan 25cc (from weed whacker) and this one seems to be runing great. I mean for what the engine is worth.
Poulan 25 doesn't make a huge power and compared to other engines of that size - it is rather on the low end. In example my MVVS 26cc turns APC 18x6W at 8k rm, while Poulan 25 runs APC 17x6 (smaller prop) at 7400rpm. But at least Poulan makes the same power on glow as on ignition.
I believe it is possible to tweak Poulan 25 for more power (bigger ports and carb, changing timing and so) but it may loose it's ability to run on glow plug.
RysiuM