OutdoorKing Repair Forum Forums Repairs and Maintenance Questions on Walk Behind Lawn Mower Frames Question On Scott Bonnar Cylinder Mowers Scott Bonnar 45 twin rail clutch

Hi,
I’m new to the forums.

Just a quick background before I get to my question.

I’ve inherited a Scott Bonnar 45 and a Scott Bonnar Diplomat. Both weren’t running and need work. A week ago I knew nothing about these mowers but have been on a steep learning curve.
After reading the forums for a while it looks like the 45 is the best one to try and get into usable condition.

I thought I was up for a new engine as the old ones oil looked like a chocolate thickshake and it wouldn’t start. After repairing the pull starter clutch, de-carboning the head and valves, upgrading points to electronic ignition coil and rebuilding the carb and changing the oil twice I’m pleased and a bit surprised that the motor now starts easily and runs really well.

My current issue is with the clutch. After starting and running the engine the clutch was disengaged but but was randomly engaging and making a screeching noise before the cotter pin flew across the yard(luckily missing me).
The cotter pin had scored the output shaft and obviously wasn’t locking the onto the clutch half.
I have slid the clutch half down to a fresh piece of metal on the output shaft, tightened the cotter pin, adjusted the clutch and done a test mow.
The mower works which is great but the clutch doesn’t look right as there is a bit of a wobble to it.

I’m wondering if I have fitted the clutch incorrectly or if it’s worn beyond repair?
I’ve attached a photo of the clutch half.

Thanks.
Brent.