I'm now thinking of using these for flyback diodes: http://www.sanrex.com/images/PDFs/BKR400AB10.pdf , but I can't make out if they are fast enough. Would it be a good choice? Or can anyone suggest an appropriate diode?
I'm planning of using the mower chassis for common ground (like most cars). Is that a bad idea?
What kind of capacitors should I use for motor noise suppression?