480 X 22.2 volts is 10000 RPM pretty good for a 50-55 mm sub surface prop. Kv is RPM per volt so low Kv motors use higher voltage to achieve a similar RPM. Ie a higher Kv motor will be faster on the same voltage. For the same RPM a low Kv high volt motor will draw lower amps than a high Kv low voltage with the same RPM.
I put that exact motor in a wooden Riva Corsero (Vietnam type mahogany boat) on 6 cell with a 80 amp ESC and a 48 mm high pitch racing 3 blade prop, couldn't go over 3/4 throttle without the boat becoming wild so down sized the prop to a 45 mm 2 blade. A picture of my set-up may appear in an article by a MBM member showing how its water cooled, though with the smaller prop the watercooling is un-necessary.
Cheers
Nick