I have an HP 61 GC with Slide Carb.
I get 12,800 rpm with an 11x8 prop, main needle open 6 turns, slide open just past 1/2 way, idle needle clears slide when slide open all the way.
When I open the main needle more, the engine does not become rich (4 cycling). When I close the needle below 5 1/2 turns, I lose rpm.
I have cleaned the carb to ensure that there is no blockage...
My questions:
1. Can my needle setting be considered normal?
2. Is the slide carb open 1/2 way considered to be full throttle?
Thanks for your assistance...