The pulley on this exmark 36" walk behind

JCT268

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Joined
Jun 17, 2021
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OGaSEVc.jpg
pulley alignment appears fine, belt is fine, but htf does this happen. It's still a fairly new mower with 126 hrs on it. I've already replaced the pulley
 
That looks very much like a fatigue fracture that would happen if the shaft is bent slightly
 
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