Simplest check is to use the capacitance range on the meter and measure them. Short the 2 leads on the capacitor forst to remove any charge, but as you have them off anyway there probably is none. Reading should be over 45uF for them to be functional, and the simplest is to replace them, motor run capacitors of 50uF are a common value, and you get them with wire leads like that very easily from most large electrical wholesalers as well, or from any industrial motor supplier. Them going low value will result in the motor not starting, and blowing fuses, though first check, with the power disconnected, that the motor does turn freely. if the motor start capacitor is open the motor will try to start, and as it does not turn fast enough to disconnect the start switch it blows the fuse. Same if the start contacts are sticking for some reason as well.