done this a couple times lol... to-do list for swamping the motor...
take off the seat, gas tank plastics, air box lid, air filter, & CVT belt cover.
stand the quad up on its grab bar to drain some water out.
put the quad down, pull the spark plugs out, press start button to "pump" any water out of the motor, it will shoot out the spark plug holes.
drain the oil and pull the filter. get as much out as you can (tip quad on its side, pick up the ends a lil bit to help) if the oil is a milkshake you def need to do this step again.
dry the spark plugs, dry the air filter (put over an exhaust of a buddies bike to blow the water out of it), reinstall oil and filter, reinstall plugs and air filter, reinstall CVT belt cover.
Depending on the severity and length of being swamped the gas may need changed.
Start the bike, she's a can-am so she will fire right back up!
reinstall air box lid, reinstall gas tank plastics, put the seat back on, RIDE!