RE: ZDZ40 RV prop questions
For the Hanger 9 260/ ZDZ 40 combination, the Mejzlyk 20X10 or 21X8 works the best by far. The NX will cost you RPM & power. Iknow, I tried it. I have ran over 30 gallons through my ZDZ 40 & tried several props with it. The engine likes the Mez. the best.
That said, Mike has just released a new line of props that are probably going to turn out to be the best allaround props for the ZDZ engines. A little pricey, but sometimes you do get what you pay for. I picked up one for my ZDZ 60, waiting on weather to try it out.