Maybe SOT, but I think I've seen discussions here before on motors and capacitors. Basically, how critical is the capacitance to an electric motor (probably start rather than run)?
Background... I have a lawnmower with a 1600w motor. A couple of years ago it failed to start, just producing a loud hum and getting very hot. The repair (fortunately still within the guarantee period) stated "capacitor replaced".
Last week the same fault appeared - no rotation, just a loud hum. As it was out-of-guarantee, I took it apart and found the capacitor - 30uF
450v. I ordered a new one and fitted it. Unfortunately the motor still just hummed. I dismantled the motor and cleaned it, and replaced it and the old capacitor. It now works, but I found some mechanical damage on dismantling. I might have to replace the motor some time.On the motor itself I found a label which, amongst rotation speed, power, and other things, had "25uF 450v" on it. So was the original repair replacement capacitor at 30uF slightly too high? I see these capacitors have a 5% tolerance. Unfortunately I can't find a spec page for the motor, but the current replacement (GJC-1600) at refers to a 16ufF capacitor!