Sierra is a leading supplier of primer bulbs to the marine aftermarket. Our bulbs use double check valves with viton balls and stainless steel springs, as well as Floroelastomer (FKM) material for traditional look and operation. 7 1/2″ or 190.5mm overall length including barbs. Meets current EPA regulations in effect 1/1/2011 of 15 g/m2/24 hrs. Both EPA/CARB certified. Replaces: Johnson/Evinrude 174512, 176444, 5008586, 775639. Mercury 13330A2, 13330A3, 13330A4, 13330Q06, 13330Q07, 13330Q5, 17149M, 17165M