SeaSense® 50073804 All-In-1 Outboard Motor Primer BulbSeaSense All In 1 Primer Bulb has threaded ends and changeable fittings to accommodate 1 4", 5 16" and 3 8" I. D. fuel hose. Double check valves to hold prime longer. Oversized directional bulb works on all hp outboard motors. UV inhibitors protect it from prolonged exposure to sun. EPA and CARB compliant. All in 1 primer bulb Threaded ends and changeable fittings to accommodate 1 4", 5 16" and 3 8" I. D. fuel hose Double check valves to hold prime