Small Engine Troubleshooting Problems? Ask a Mechanic Now.
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In order to get the drive clutch or pulley off as you are calling it you will need to remove the spark plug from the engine. Acquire a small piece of rope around 18" - 24" long and drop one end of the rope down into the spark plug hole(insert as much of the rope into the cylinder through the spark plug hole as you can, leave enough hanging out that you can easily use it to pull the rope out when you are finished).
Down through the center of the drive sprocket there is a screw that you will have loosen in order to remove the drive sprocket, you can't remove it completely because it is captured in the sprocket. Once this screw is loosened lift the sprocket off of the shaft(be careful not to loose the small washer that is under the sprocket). Then you will need to remove the drive clutch which is threaded onto the shaft, it is standard thread and can be removed with a large pair of channel lock pliers or a hammer and punch. Once you have removed the drive clutch the housing can then be removed in order to repair the starter rope.
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