RE: OS 91 FS Surpass problems
The thing that is consistent is
"I cant get it to idle without the glow atatched.
Even if it is runniong at about 1/3 throttle, and I remove the glow, it will imidiatly drop rpm, and finaly quit. "
There's a clue there. I know you changed the glow plug, but something is cooling it down as soon as you pull the driver. I am no expert in 4 strokers or valve clearances, but it could be the intake valve is letting in too much fuel. I don't know about how to adjust that, but a solution may be as simple as a plug with an idle bar. An idle bad shields the glow element from being splashed with raw fuel which cools it. Worth a try.
Rick