Item 112 is the Engine Clutch Thrust Race, SB part number 3534016. In Outdoorking's on-line parts store it is part number 020501-160. Unfortunately I don't know the bearing number. Isn't there one stamped or etched on the old bearing in your mower? If not, perhaps another member will know what it is. Of course it is possible that it is a non-standard item, only available as an SB part. At $21.83, it is not all that expensive.
