Originally Posted by kmeyers

Prop 16x8,17x6, 18x6 2 blade.
15x6 three blade


Needle settings, don't know. if I think the needles need to be touched it means there is a issue to look into (tank, fuel, plug, battery, carb.......)

I have run the same needle settings ( I may have touched them and don't remember) and prop since new 12 years ago and just under 1000 hours of operation. This plane comes out every ~ October and is flown until ~ end of April each year. It is my "winter plane" ( I have skies for it too). The skies didn't get used this year.

That is me and the Zen 20 in my sig pic. H9 .60 Ultra stick with rudder and elevator servos in the tail and fuel tank in the under wing where battery and receiver usually goes. Forward hatch cut where tank would go and ignition and ignition battery there. All hinges are du-bro pin type. No mods to the landing gear beyond bending them together and 3.5" wheels. My prop is a black 16 x 8 MA K series that is original to the engine. It hits the ground at least once per flight (that is the truth!).

The Zenoah EI ignition worked for about 3 years and was replaced with an RCexl #1 igintion. I always run 32:1 quality oil.

I don't have the same way of setting the mixture as most use.

I start with 1.75 L and 1.75 H and a prop that you have researched for the engine as a proper load (usually a smaller list then manufactures recommended props list). I first get the engine running, let it warm up at a reasonable RPM (around 3500), then go to full throttle and tune for max RPM (finding both too rich and too lean then set in the middle of those).

Then I tune the low needle for leanest 3000 RPM and close the throttle till idle and no stumble advance are to my liking (I believe that this method serves to set an "air opening" to low needle setting).

Hope this helps.