ORIGINAL: skillet92

He means that the bolt holes are two per blade side. Imagine looking the 5 on a dice and put the blades on the side. That is what you would see if you looked at your prop. It is suppose to put your prop at the2 or 3 oclock position for safe hand starts. I have done them all kinds of ways. If you have your engines tuned properly you don't have problems with the starting.