Typically the starter drive is not locking up intermittently, but it is also possible to have some worn teeth on the ring gear. The starter must be removed to inspect the teeth on the ring gear, but even then it can be hard to tell because only the front part of a few teeth are worn away. Engines often coast to a stop in the same orientation causing the starter drive to initially engage with the same teeth on the ring gear over and over.
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Tuesday, September 27th, 2016 AT 8:13 PM