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Turn it over the recoil assembly and you should see the knot from the old rope get some needle nose pliers if necessary and pull the old rope out by the knot. Once all the old rope is gone begin to prewind your pulley by turning it in the same direction as if you were pulling out the rope to start it. Wind it up as far as you can until it stops. Now turn it back until the hole in the pulley and the hole in the housing line up. Insert your new rope through the housing hole and straight through he hole in the pulley and tie a knot. Holding onto the rope, allow the spring tension to pull the rope into the housing. Reinstall on your engine.