Broken spring in recoil starter on lawn mower
While I have not done this on newer model lawn mowers, I have replaced recoil springs in the past. Here's what I did: First you need to pull the spark plug wire off so the engine will not start. Then block the flywheel with a piece of wood to keep it from turning. Then, using another piece of wood such as a short (6-8 inch) hardwood dowel placed against the ears of the recoil drive, and drive it in a reverse direction (clockwise) with a hammer to knock it loose. It may take several sharp blows to break it loose. The recoil drive is reverse threaded to keep it from coming loose when the engine is running. Once the drive is loose, remove it to get access to the recoil spring which must be replaced if it is broken. With a new spring in place, rethread the recoil drive counter clockwise until it is finger tight. Then, tighten it down with one sharp blow against the wooden dowel.
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