Jul 11, 2019· Mclane Reel Mower Motor Replacement. ... Mine is a 20" reel mower so I can't attest to other size mowers bolt patterns. Pulley: I went with a " diameter 3/4" bore from Ace Hardware. The pic in the link shows the wrong size but it's the correct part number for the " diameter pulley. The pulley on the BS was a " so I stuck with that.