Henson,

I'm pleased to read you worked out the problem

My battle cry in the engine tech support world.... check the fuel system.

About 85% of issues that arrise come from the fuel system, not from the engine.
Something folks should keep in mind as a general thought.

Image here is of my 1/4 scale H-9 cub, Gemini FT-120 power (old one). Utilizes an Expert glow driver on board which kicks on around 1/8 throttle. Using standard 15% sport fuel (power master). Turns an 18x5 zinger prop at 6800-7000 rpm, and provides very realistic performance.

Bob