Mercuiser Repair KitsFigureDescriptionPart #AComplete Water Pump KitSIE-18-3317BUpper Housing Water Pump KitSIE-18-3517CWater Pump Kit W/O HousingSIE-18-3217DProp Nut KitSIE-18-3701ELower Unit Seal KitSIE-18-2652Note: Kit Contents Listed In Selection BelowFigureDescriptionPart #QtyKit1Lower Gear Housing18-240212Water Tube Guide18-31091A,B,C3Bush Water Pump Housing18-31101A,B,C,E4O-Ring, Upper- Drive Shaft18-71581A,B,C,E5Slinger18-74261A,B,C,E6Stainless Steel Locknuts (5/16-24)18-372317Stainless Steel Locknuts (1/4-28)18-372228Washer18-427539Screw18-3226110Washer, Water Pump Body18-4270111Upper Pump Housing18-31161A,B12Insert Cup18-3114113Impeller18-30171A,B,C14Drive Key-115Gasket, Upper Water Pump to Wear Plate (Upper)18-29151A,B,C,E16Impeller18-31171A,B,C17Gasket, Upper Water Pump to Wear Plate (Lower)18-29141A,B,C,E18Dowel Pin18-3227219Water Pump Base18-34171A20Oil Seal (Upper)18-2026121oil Seal (Lower)18-20141E22aO-Ring (2.175 ID) & (2.1091 ID)18-71761A,B,C,E22bO-Ring (2.175 ID) & (2.1091 ID)18-71961A,B,C23Gasket, Water Pump Base to Gear Housing18-28261A,B,C,E24Pin, Driveshaft-125Spring-126Tapered Roller Bearing18-1164127Shim Kit, Drive Shift Shaft Bushing18-2295128Drive Shaft18-2167129Shift Shaft Washer18-4267130Washer, Rubber Shift Shaft Bushing18-2340131Oil Seal26-89236132Shift Bushing18-21541E33O-Ring18-7153134Washer, Lower Shift Shaft Bearing-135Retainging Clip, Shift Shaft18-4295136Stainless Steel Shift Shaft18-2150137Stud, Gear Housing to Drive Shaft Housing (1-31/32″)-238Stud, Water Pump To Gear Housing (3-3/8″)-139Stud, Gear Housing to Drive Shaft Housing (3-3/16″)-140Stud, Water Pump To Gear Housing (3-1/4″)-241Oill Passage Seal18-29441A,B,C,E42Dowel Pin, Gear Housing to Drive Shaft Housing-243Screw, Gear Housing to Drive Shaft Housing18-2361144Nut, Gear Housing to Drive Shaft Housing-245Gasket, Gear Housing Drain Screw18-29451A,B,C,E46Plug, oil Fill/Drain18-2244147Insert, Water Pick (Stbd)-148Insert, Water Pick (Port)-149Screw Insert to Gear Housing18-3197150Nut, Insert Screw18-2344151Trim Tab18-6011152Screw, Trim Tab to Gear Housing18-6245153Needle Roller Bearing18-1150154Lower Unit Gear Set (Pinion Gear)18-2200155Pinion Nut18-3719156Shift Crank18-2130157Shift Spool Assembly19755A2158Shim Kit, Forward Gear Bearing18-2285159Tapered Roller Bearing18-1159160Needle Roller Bearing18-1157161Lower Unit Gear Set (Forward)18-2200162Spring, Retainer, Cross Pin18-2348163Sliding Clutch18-2202164Cross Pin, Clutch To Clutch Actuating Shaft18-2348165Propellar Shaft18-2166166Shim Kit, Thrust Ring to Gear Housing18-2284167Lower Unit Gear Set (Reverse)18-