Sierra Marine Parts Catalog

817 I/O — MERCRUISER - I/I-R/MR/ALPHA ONE Drive Shaft Housing Components (Typical) AR As required Figure # Description Part # OEM # Qty. 1 Upper Gear Housing N/A 1547-9412A18 1 2 Screw, Top Cover 18-3231 10-98794 4 3 Top Cover 18-2381 94998A2 1 4 O-Ring, Top Cover 18-7161 25-32546 1 5 Shim, Bearing Cup to Top Cover 18-2283 15-45691A1 1 6 Tapered Roller Bearing 18-1165 31-61100A1 1 7 Upper Drive Shaft 18-2179 45-55796 1 8 O-Ring, Upper Drive Shaft 18-7445 25-55801 1 9./10. Upper Unit Gear Set 1.5:1 18-2201 43-18410A2, 46-18411A2 1 Rebuild Kit 18-2256 43-803116T1 1 1.65:1 18-2203 43-45814A5 1 Rebuild Kit 18-2257 43-803112T1 1 1.84:1 18-2204 43-75325A3 1 Rebuild Kit 18-2258 43-803114T1 1 1.98:1 18-2205 43-55778A3 1 Rebuild Kit 18-2259 43-803101T1 1 11 Tampered Roller Bearing 18-1161 31-35990A1 1 12 Shim Kit, Bearing Cup to Drive Shaft Housing 18-2293 15-36178A1 1 13 Oil Seal, Upper Drive Shaft Housing 18-2049 26-32511 1 14 Oil Seal, Lower Drive Shaft Housing 18-2056 26-96503 1 15 Vent Screw 18-2244 10-79953A2 1 16 Gasket, Gear Housing Drain Screw 18-2945 12-19183, 12-20260 1 17 Plug,Trim Tab Hole 18-3232 19-47579 1 18 Stud, Drive Shaft Housing N/A 16-56295 2 19 Bushing, Drive Shaft Housing 18-3236 23-32632 1 20 Nut, Gear Housing Stud 18-2362 11-13439-1 3 21 Welch Plug, Drive Shaft Housing (7/8” OD) 18-4272 19-32652 1 (1 1/4” OD) 18-4273 19-42682 1 22 Pipe Plug, Water Pocket 18-4265 22-428611 1 23 Nut, Drive Gear to U-Joint 18-3713 11-22339 1 24 Washer, Drive Gear to U-Joint Nut 18-3712 12-45810 1 25 Shim Kit Drive Gear 18-2292 15-35980A1 1 26 Bearing Kit 18-1160 31-35988A2, A12 1 27 Spacer (comes with kit) 18-1160 31-35988A2, A13 1 28 Roller Bearing (comes with kit) 18-1160 31-35988A2, A13 1 29 Oil Seal 18-2003 26-64893 1 30 Carrier Assembly Oil Seal 18-0577 66081A2 1 31 O-Ring 18-7169 25-70937 1 32 Ring, Roller Bearing Retainer 18-4296 35983 1 33 Reataining Nut Drive Shaft Housing 18-3752 816811-1 1 34 Yoke Assembly 18-2125 46020T 1 35 Heavy Duty U-Joint 18-2104 75832A2 1 36 Center Socket 18-2128 39383T 1 37 U-Joint Shaft Coupler 18-2146 59830A1 1 38 Drive Shaft 18-9218 59830A5 1 39 O-Ring 18-7153 25-25439 2 40 Screw, Water Pocket Cover to Drive Shaft Housing 18-3229 10-28668 4 41 Gasket, Water Pocket Cover 18-0894 27-55810 1 42 Water Pocket Cover (Sold as Assembly includes 40-44) 18-3219 42724A3 1 43 Bushing, Water Pump Housing 18-3110 26-38970 1 44 Water Tube 18-3220 32-54236 1