FROM MAIN CENTER SHAFT TO EACH MOUNT BOLT IS 4 - CENTER TO CENTER. SPACING BETWEEN MOUNTING BOLTS IS: 7 11/16" - 6 3/16" - 6 7/16. FITS MANY BRANDS SUCH AS KARCHER, GENERAC, BLACKMAX, CRAFTSMAN, BRIGGS, HONDA, POWERSTROKE, and OTHERS! Thank you and any questions please ask! We appreciate you taking the time to look at our product and will be honored to offer our services to you.