Showtime,
Unfortunately Foamy is a bit off here. Props aren't designed for a specific sized engine, I've had to ream out many props in order to get them on a .46 engine. It's just part of being in the hobby. What you need is a prop reamer to ream out the hole. You can use a drill if you don't have one, but if you aren't careful when you do it you can get the hole off centered and wind up with a prop that is useless. By using a reamer you will keep the hole centered on the prop. This is what you need [link=http://www2.towerhobbies.com/cgi-bin/wti0001p?&I=LXK248&P=ML]Great Planes 4 step prop reamer[/link] . It has 4 different cutting sizes on it and will ream out to fit quite a few of the engines on the market today.

When you ream out the prop you want to turn the reamer in just one direction, which will be clockwise. This is because this is the direction the cutting teeth are oriented. Even when you are removing the reamer you will still turn it the same direction as you remove it. Simply insert the reamer into the prop hole and turn it until it cuts to the next "step" on the reamer, and then check to see if it fits on the prop shaft. Continue doing this until you open the hole up enough to slip it on the prop shaft

Don't worry about having to do this as it's actually quite common to have to do this.

Hope this helps


Ken