u can try putting the boat in the water and then rock the transom up and down to fill the pump with water and get the air out.. but this little brass deal on the top of the bowl works wonders.. Duane at HTP sales them. My boat would be very hard to prime with the droop before installing this.. now i just back in fire up and go.
http://www.hotboatpics.com/pics/data...09P6171086.JPG