Moeller Marine offers accessories to protect your boating investment, including lower unit transfer pumps. For use for outward lower units, power trim, and tilt units, these quart-sized pumps are designed to fit outboards and stern drives with 3/8 in.-16 threaded screws. For Johnson/Evinrude, Mercury/ Mariner, Suzuki 25 hp and larger, Yamaha 8 hp and larger.