Chopper Man,
Try to avoid putting Locktite on your prop nut. This can cause real problems on down the line when it's time to remove that prop, as it will be very difficult to get off. Instead of using Locktite you just need to make sure that the prop nut is properly tightened. First off, did you use one of those multi-wrenches that can also be used to remove the glow plug?? If so, don't use that for tightening the prop. You just can't get enough leverage on it to properly tighten the prop nut with. Get a glove and put it on your left hand (or your right hand if you're a lefty), you will use this hold the prop with as you tighten the nut and the glove will keep the prop from cutting your hand. Now get a box end wrench to tighten the prop nut with. Get it as tight as you can with your hands. Don't worry about getting too tight as you won't damage the threads by over-tightening it. If you follow these steps you won't have to worry about the prop nut coming loose while starting it, or in flight.

Hope this helps

Ken