Little help with pump motor

[tedder]

Hey all. Nice place you have here. Attempting to switch this motor over from 110V to 220V for obvious reasons. Not sure why anyone would hook up a motor of this size (1HP) to 110V. Currently wired to panel to 15A single pole breaker on 14/2 copper.
New 15A double pole breaker purchased for 220V and installed in panel...and yes I wrapped the neutral wire with black tape! As you can see from the photo the wiring in the motor is set up for 110V.
I moved black wire from L2 (feed from pressure switch) to #4 terminal and violet wire from #4 to #3 terminal. Turned power on, motor just hummed and internal overload protection kicked the motor off. Obviously I'm missing something and hope some of you guru's can point me in the right direction.
Cheers
Tedder