Ok my friend, my best advice here and then it's up to you. If you are not qualified to cut the shaft and thread it yourself, then have someone do it that can do it properly. Then contact either Ken at www.lambertsrc.com for a prop hub, or go ahead and buy the short shaft hub from Jag's engine if it will indeed fit the Homelite 30cc. If you don't have the money, have patience and save it up but do it right. Hey, you got the engine, mount, good carburetor, and muffler suitable for converting for only 40 bucks; spending a little money on it to convert it is still going to keep you under what a current glow engine of most any size would cost you.....

A Homelite 30cc likes either a 16 x 8 or an 18 x 6 prop depending on what kind of airplane it is on. 16 x 8 for a fast plane, 18 x 6 for a slower, larger plane.

AV8TOR