It needs a 10 mm through-hole with a 12 mm ream at the rear of the prop, 5 mm deep. Or you could just ream it 12 mm all the way, I didn't like doing that so it could fit other engines. Standard bore on almost all large props is 10mm.

The Mezjlik will fit fine but you will need a 12 mm reamer to make it fit the aft part of the prop bolt. You want about 8400 RPM's with that engine. I used a Bambula 18x8 and it really pulled the plane hard in verticals. The Mezjlik will likely turn around 9000 since the paddle area is a lot less than the Bambula. Not a bad prop. You could save a bunch of money and just get a wood Airwild NX, Menz, or JFX 18x8 prop. They all would run well on that engine and are much lighter than the CF.