RE: Glow Plug Idle Bar
Don't know why there is an idle bar on plugs, but about 4-5 years ago I got tired of trying to keep up with what plug worked best in what motor. OS#*, Enya #*, 2 stroke, 4 stroke, large, motor, small motor!!!!!!! It was crazy, then a fellow flyer suggested trying Fox Miracle plugs. Now I use them in every motor regardless of size, 2 or 4 stroke. I very seldom have starting or tuning problems, and very seldom need to change plugs. I got a good deal on card of them at a swap meet a few years ago, and still have some left. I have about 15 glow motors & they work good in every one, without exception. I still have a lot of other plugs that are takeouts and acquired through trades etc, that I use when breaking in motors.
I'll stick with what works for me.