The Quietline pulley is 4.25 inches. The earlier pulley is 5 inches. If yours is 4.25 then you would have to come up with a custom pulley to speed it up. Doing so would be at your own risk as the decks weren’t engineered for that.
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Doug
Dad's 122 w/42" cast deck, spring assist, lights,weights, rear lift
1250 w/hydraulic lift, lights,weights, spring assist.
50C deck converted to an A with front wheels
44C deck converted to an A with front wheels.
QA-36A
42" blade
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