I am going through the same thing with my 064. Pawls are worn, but will still engage sometimes. The trick is to pull the rope out and let go of it to set the pawls in position to start. This trick would be OK if the saw started after a couple of pulls, but mine doesn't, so I tried to fix it. Bought new pawls and pulley off ebay, they fit too tight to even move. Next is to go to the dealer and get the right parts. This really makes me love my 066 with the elastostart and decomp button.