I had to replace the plastic pulley on my Echo pb750 today. I'd never done it before so I had to learn a few things. Hopefully I can pass some info on to someone in the future who will be doing the same thing. I searched on here and found some valuable info but, none of it was in the same thread. I had to piece a lot of threads together and even still I had to stare at this thing before it all came to me. I figured there had to be a way for a shop mechanic to quickly and easily replace the parts. Here's how I did it. 1. Wind the spring tightly on a flat surface. 2. Insert the spring into the housing and make sure the end catches. 3. Wind your rope in the proper direction on the pulley and pull it into the little side notch so it will hold itself. 4. Set the pulley into the housing and crank it backwards until it catches on the spring, wind it a little to add some tension to it. 5. Run the rope through the guide in the housing and attach the handle. 6. Reattach the housing to the blower. I hope this is simple and clear so someone else will have an easier time when it comes to replacing a spring or rope in their recoil assembly. Tony PS I'll take it apart in the next couple of days and post some step by step pics.