Robert L Randolph , MA June 06, 2015 Appliance: KitchenAid 5-Speed Blender KSB5MC4 Kitchenaid Blender Ksb5mc4: The blender coupler wore out i. How to replace Blender Drive Coupler. I pryeb of with a screwdriver Do-It-Yourself Rating: Repair Time Estimate: Less than 15 minutes