Mercury - Mercruiser 21-857005A-1 Outboard Fuel Pump Diaphram Kit Fuel Pump Kit for Mercury and Mariner Outboards Fits 30 JET 35 hp Serial No. B110789 UP 40 hp 4 Cylinder Serial No. C159200 UP 45 hp 4 Cylinder Serial No. B110789 UP 45 JET Serial No. 6428681 UP 50 hp 3 Cylinder Serial No. B122930 UP 5055 hp 3 Cylinder Serial No. D000750 UP 60 3 Cylinder Serial No. B122930 UP, D000750 UP 65 JET Serial No. 283222 UP 75 4 Cylinder Serial No. 6432901-C099999 75 3 Cylinder Serial No. C222000