I drill a hole all the way through my prop hubs diameter between where the shaft bolt ends and the prop bolt ends. I use the hole to put a screwdriver through it to tighten to prop hub on the engine shaft. The hole then is a good place to feed about 1/2 inch of pull start rope into and wrap around the prop hub. It works great. It also puts the side pulling force closer to the firewall so you will be less likely to rip the engine off. It also keeps the rope behind the prop. Be sure you do not put the rope all the way through the hole, or it may not pull out and that could be ugly.