this is probably going to have a really simple answer, but how do you get your engine to stop with the prop horizontally?

Mount the prop so that when you push the prop in the running direction, it comes up on compression when level. That's what the air does when the engine stops.

Place the prop at the 2 o'clock position....making sure the engine is on compression. When the engine stops...it will rotate back to the 3/9 o'clock position...!!

Simple

thanks guys. I had a feeling it was going to be something simple like that.