YS 120ac prop selection
 

I recently bought a Bucker Jungmann with a 120ac motor and I wanted to put a carbon fiber prop on it. I currently run a APC 16-8 an would like some input on proper prop selection. Also I would love to have the instruction manual for this motor. It is 5 years old and was rebuilt at 13 hrs. I only have about 2.5 hrs on it since then. It is the nicest running motor I have ever had. I love the power. Any info would be greatly appreciated.

YS 120ac prop selection
 

Any prop which allows the engine to run between 8500 and 9000 will work, but depending on your flying style some will work better then others.
The 16x8 is a good size to start with.
You might give Richard Verano a call at our service dept., he may have a copy of the AC instructions that he can send you.
The number is 775-782-4562.

Glad you like the engine.

Good Flying,
Dave Shadel

YS 120ac prop selection
 

I would recommend a 15x8 or 16x6 for that engine if you are looking for thrust. If you are looking for speed, then I would recommend a 14x14 or 14x10.