If you cant find an exact then go with one higher but as close to the original as possible dont install one with lesser output. Make sure to replace with one of the same mf and voltage. Often will be a small black box with several wires connecting to the supply and or motor. Others just boost on start up then drop out and the motor does its thing. It keeps a consistant voltage to the motor to acct for fluxuations in alternating current and spikes. They boost the motor on start up to spin from a dead stand still. They are all similar but the main diff is the cap. If the motor runs and is quiet and smoothe you most likely have a bad cap. Spin the blade hard with your hand and switch to high. If it still wont start on its own install the blade. Spin the shaft and see if it spins extremely easily. Remove the motor and open the case detail clean with soft tooth brush then lube the bearings wo getting armature or mags oily. At this point you can go a few different directions. When you think its clean enough, do it again. If available use a compressor with air nozzle after ward. Use a small tip if possible to increase vacuum. A defective start capacitor or defective run/start capacitor.
