That's a 1/85 HP 12 rpm coin pusher motor, on ebay $50 each. Sounds like a plan but you'll need a large prop to move that much water around with that slow rpm. Something like 9" diameter by 11" pitch bronze outboard racing prop would move the water at that low rpm's. This may also overpower that shaded pole motor. JMO.
Bier Jagdwaffe... Bier 30 zeit.....~~=o&o>..........