I pulled off the cover and belt as suggested to test. Two were fine but the right hand one made a clunking sound and wouldn't spin all the way around without a little coaxing. So I'm thinking it's bad and needs to be replaced.
However, I then packed them all with grease and after a few rotations the bad one starting spinning ok. Still a tiny bit of noise but barely noticeable.
I reconnected the belt and ran the mower for a few seconds and it sounded pretty good. Granted, I have only run this mower once before so I'm not 100% sure what 'good' sounds like, but there was no whining or smoking. I need to finish the rest of the lawn so figure I'll try it Saturday as-is.
For a replacement, it appears I need part #IH-ST745 or # 759-3479P, is that right? Any suggestions on where to look for the best price?
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