Sleeve bushing for lawn tractor crankshaft

[Frank S]

Obviously having a sleeve on a shaft means any attachments driven by the crankshaft are going to require a special shaft key.
I made one by cutting a strip off of a piece so 1/4" thick cold rolled steel and grinding it to size on my belt sander

The sleeve pushed over the shaft

The sleeve and shaft key in the pulley

The key in the sleeve