The pulley is 4-1/2" dia, with a 1/2" groove.
A 42" thrower is working a 12 hp motor.
I have a 42" on my 782 with a 18 Hp twin and it does well,but with 12 hp you will just have to go a bit slower.
The pulley is avail from our sponsors as well as aftermarker.
Browning makes a 4-1/4".that is real close.
I'm sure others will chime in here also.
Do not use a aluminum or die cast pulley, use only steel/cast iron.
The soft pulleys are short lived and like to break, throwing pieces sometimes.
Check the right angle gearbox for condition of the gears. usually it is the big one that looses teeth They are no longer available from cubcadet, only used,
and I have not found anyone making an aftermarket replacement.
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