Bosko J Pleasant Prairie , WI March 19, 2019 Appliance: KitchenAid Mixer KSM150 Kitchenaid Mixer Ksm150: First of all the mixer speeds were not like they were supposed to be low to high, lots of variability in speeds. I replaced the governor and control plate and fine tuned the speeds. How to replace Control Plate Spring. Replaced contol plate and governor Do-It-Yourself Rating: Repair Time Estimate: 15-30 minutes