Parts for MerCruiser IA / IB / IC (EZ-Shift) 1965-1966 Gear Housing Assembly, Complete
Reference numbers in this diagram can be found in a light blue row below — scroll down to order.
| # | 1623-2511A 3 | GEAR HOUSING ASSEMBLY, COMPLETE SEE NOTE BELOW (1 required per assembly) |
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1623-2511A 3 - Gear Housing Assembly [ More info ] Unavailable |
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1623-2511A 5 - GEAR Housing, NLA [ More info ] Unavailable |
| # | 1623-2511A 5 | GEAR HOUSING ASSEMBLY, COMPLETE SEE NOTE BELOW (1 required per assembly) 8 |
| #1 | 1623-2511A 1 | GEAR HOUSING ASSEMBLY (1 required per assembly) |
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1623-2511A 1 - Gear Housing Assembly [ More info ] Unavailable |
| #2 | 17-37972 | PIN, SHIFT CRANK - GEAR HOUSING (1 required per assembly) |
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17-37972 - Pin, Shaft Crank - Gear Housing [ More info ]
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17-37972 1 - Pin [ More info ]
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| #3 | 16-29080 | STUD, GEAR HOUSING TO DRIVE SHAFT HOUSING (3 3/16") (1 required per assembly) |
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16-29080 - Stud [ More info ] Unavailable |
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| #4 | 16-45198 | STUD, GEAR HOUSING TO DRIVE SHAFT HOUSING (2") (2 required per assembly) |
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16-45198 - STUD [ More info ] Unavailable |
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16-52614 - Stud [ More info ] Unavailable |
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16-57920 - Stud [ More info ] Unavailable |
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16-57920 1 - Stud [ More info ] Unavailable |
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16-57920 3 - Stud [ More info ] Unavailable |
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168M0133358 - Stud [ More info ] Unavailable |
| #5 | 16-36292 | STUD, WATER PUMP BASE AND BODY TO GEAR HOUSING (3 3/8") (1 required per assembly) |
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16-36292 - Stud [ More info ] Unavailable |
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16-56297 2 - Stud [ More info ] Unavailable |
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16-8M0034463 - Stud [ More info ]
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| #6 | 16-30667 | STUD, WATER PUMP BASE AND BODY TO GEAR HOUYSING (3 1/8") (2 required per assembly) |
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| #7 | 31-35934 | BEARING, ROLLER - DRIVE SHAFT (1 required per assembly) |
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31-35934 - Roller Bearing [ More info ]
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31-35934A 1 - Roller Bearing [ More info ]
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| #8 | 39235 | SLEEVE, THREADED - GEAR HOUSING (1 required per assembly) |
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23-98621 - Sleeve [ More info ]
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| #9 | 17-21438 | PIN, DOWEL - GEAR HOUSING TO DRIVE SHAFT HOUSING (2 required per assembly) |
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17-21438 - PIN-DOWEL,NLA [ More info ] Unavailable |
| #10 | 45-36386A 1 | DRIVE SHAFT ASSEMBLY (1 required per assembly) |
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45-36386A 1 - Drive Shaft Assembly, NLA [ More info ]
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| #11 | 17-30545 | PIN, DRIVE SHAFT (1 required per assembly) |
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17-30545 - Pin - Priced Individually [ More info ]
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| #12 | 24-34576 | SPRING, COMPRESSION - DRIVE SHAFT (1 required per assembly) |
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24-34576 - Spring, Compression - Drive Shaft,NLA [ More info ]
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| #13 | 25-30613 | "O" RING, UPPER - DRIVE SHAFT (1 required per assembly) |
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25-30613 - O-ring, Upper Drive Shaft [ More info ]
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25-8M0214919 - O RING @5 [ More info ] Unavailable |
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18-7158-9 - (PK5) O-Ring 25-30613 [ More info ]
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| #14 | 43-35922 | GEAR, PINION DRIVE - SHAFT (1 required per assembly) |
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43-35922 - Gear, Pinion - Drive Shaft [ More info ] Unavailable |
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43-55812 - Gear, Pinion - Drive Shaft [ More info ]
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43-55812T - Pinion Gear [ More info ]
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| #16 | 15-33143A 1 | SHIM, DRIVE SHAFT BEARIN TO GEAR HOUSING (AR required per assembly) |
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15-33143A 1 - Shim Assembly [ More info ]
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15-57007A 1 - Shim Set [ More info ]
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18-2295 - Shim Set, 15-57007A 1 [ More info ]
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| #17 | 31-36387A 1 | TAPERED ROLLER BEARING ASSEMBLY, DRIVE SHAFT (1 required per assembly) |
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31-36387A 1 - Tapered Roller Bearing [ More info ] Unavailable |
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18-1143 - Bearing 31-36387A1 [ More info ]
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| #18 | 31-35923 | CUP, TAPERED ROLLER BEARING (1 required per assembly) |
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31-35923 - Cup [ More info ] Unavailable |
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31-35924A 1 - Bearing Set [ More info ] Unavailable |
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31-35924T 1 - Bearing [ More info ]
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| #19 | 27-33146 | GASKET, WATER PUMP BASE TO GEAR HOUSING (1 required per assembly) |
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27-33146 - Water Pump Base Gasket [ More info ] Unavailable |
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27-85610 - Water Pump To Gear Housing Gasket [ More info ]
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27-85610 1 - Gasket - Priced Individually [ More info ]
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27-856704 - Water Pump To Gear Housing Gasket [ More info ]
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27-8M0214962 - GASKET @5 [ More info ] Unavailable |
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18-2826-9 - Gasket 27-33146 2-Pack [ More info ]
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| #20 | 25-33145 | "O" RING, WATER PUMP BASE (1 required per assembly) |
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25-33145 - O-ring, (1.984 X .139) [ More info ] Unavailable |
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25-8M0214923 - O RING @5 [ More info ] Unavailable |
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18-7162-9 - (PK5) O-Ring 25-33145 [ More info ]
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| #21 | 46-34447A 1 | WATER PUMP BASE ASSEMBLY (1 required per assembly) |
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46-34447A 1 - Base Assembly [ More info ]
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46-48762A 4 - Base Assembly [ More info ]
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| #22 | 26-33144 | OILSEAL, WATER PUMP BASE (1 required per assembly) |
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26-33144 - Oil Seal , Priced Individually [ More info ]
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18-2014 - Seal 26-89238, 26F69430 [ More info ]
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| #23 | 26-31507 | OIL SEAL, WATER PUMP BASE (1 required per assembly) |
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26-31507 - OIL Seal , Priced Individually [ More info ] Unavailable |
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26-79884 - Oil Seal [ More info ] Unavailable |
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18-2026 - Seal, 321453 [ More info ]
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18-2013 - Seal, 26-16977 [ More info ]
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| #24 | 17-35973 | DOWEL PIN, WATER PUMP BASE TO WATER PUMP BODY (2 required per assembly) |
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17-35973 - Pin -Dowel - Priced Individually [ More info ]
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| #25 | 27-32433 | GASKET, LOWER - WATER PUMP BASE TO FACE PLATE (1 required per assembly) |
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27-32433 - Lower Water Pump Gasket [ More info ] Unavailable |
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27-85608 - Water Pump Gasket [ More info ] Unavailable |
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27-85608 1 - Gasket - Priced Individually [ More info ] Unavailable |
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27-8M0090319 - Water Pump Gasket - Priced Individually [ More info ]
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18-2914-9 - Gasket 27-85608 2-Pack [ More info ]
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| #26 | 32435 | PLATE, FACE - WATER PUMP BASE TO WATER PUMP BODY (1 required per assembly) |
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32435 - Face Plate - Priced Individually [ More info ] Unavailable |
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32435 1 - Face Plate [ More info ]
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8M0204677 - Wear Plate [ More info ]
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| #27 | 27-32434 | GASKET, UPPER - FACE PLATE TO WATER PUMP BODY (1 required per assembly) |
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27-32434 - Upper Water Pump Gasket [ More info ] Unavailable |
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27-85609 - Water Pump Gasket [ More info ] Unavailable |
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27-85609 1 - Gasket , Priced Individually [ More info ] Unavailable |
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27-858524 - Water Pump Base Gasket [ More info ]
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18-2915-9 - Gasket 27-858524 2-Pack [ More info ]
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| #28 | 46-37433A 1 | WATER PUMP BODY ASSEMBLY (1 required per assembly) |
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46-37433A 1 - BODY ASSY [ More info ] Unavailable |
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46-60367A 1 - Body Assembly [ More info ] Unavailable |
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18-3517 - Water Pump Kit, No Base, 46-96148A8 [ More info ]
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| #29 | 30915 | INSERT, WATER PUMP BODY (1 required per assembly) |
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| #31 | 12-36446 | WASHER, WATER PUMP BODY EARLY STYLE (1 required per assembly) |
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12-36446 - Washer-nylon, NLA [ More info ]
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| #32 | 26-36557 | SEAL, RUBBER - WATER INLET TUBE EARLY STYLE (1 required per assembly) |
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26-36557 - Seal - Priced Individually [ More info ]
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18-0521 - Gasket, 26-36557 [ More info ]
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| #32 | 26-38970 | SEAL, RUBBER - WATER INLET TUBE LATE STYLE (1 required per assembly) |
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26-38970 - Seal - Priced Individually [ More info ]
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18-3110 - Seal, 26-38970 [ More info ]
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| #33 | 47-30221 | IMPELLER, WATER PUMP (1 required per assembly) |
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47-30221 - Impeller, Priced Individually [ More info ] Unavailable |
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47-65960 - Impeller, Priced Individually [ More info ] Unavailable |
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47-89984 - Impeller [ More info ] Unavailable |
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47-89984 2 - Impeller [ More info ] Unavailable |
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47-89984 4 - Impeller [ More info ] Unavailable |
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47-89984T 4 - Impeller [ More info ]
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18-3017 - Impeller 47-89984 [ More info ]
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| #34 | 17-29967 | PIN, IMPELLER DRIVE (1 required per assembly) |
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17-29967 - Pin, Impeller Drive [ More info ]
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17-8M0034466 - Pin - Priced Individually [ More info ]
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17-8M0214994 - PIN @5 [ More info ] Unavailable |
| #35 | 10-30720 | SCREW, WATER PUMP BODY TO GEAR HOUSING (2 1/4) (1 required per assembly) |
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10-30720 - Screw, NLA [ More info ]
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| #36 | 13-26992 | LOCKWASHER, WATER PUMP BODY SCREW (1 required per assembly) |
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13-26992 - LockWasher - Priced Individually [ More info ]
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| #37 | 11-35888 | NUT, WATER PUMP BODY STUDS (1/4) (2 required per assembly) |
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11-35888 - Nut (1/4-28) [ More info ]
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18-3722-9 - Lock Nut, 121731, 11-35888, Pack of 5 [ More info ]
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| #38 | 11-35814 | NUT, WATER PUMP BODY STUD (5/16) (1 required per assembly) |
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11-35814 - Nut (5/16-24) [ More info ] Unavailable |
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11-826709 11 - Nut (5/16-24) [ More info ]
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| #39 | 25-30271 | RING, RUBBER - CENTRIFUGAL SLINGER (DRIVE SHAFT) (1 required per assembly) |
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25-30271 - Ring - Priced Individually [ More info ] Unavailable |
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25-8M0214918 - WATER PUMP HSG RUBBER RING O/B [ More info ]
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18-7426-9 - O-Ring (PK2) 25-30271 [ More info ]
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| #40 | 23-29804 | SLEEVE, GUIDE - WATER INLET TUBE (1 required per assembly) |
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23-29804T - Sleeve - Priced Individually [ More info ]
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18-3109 - Tube 23-29804 [ More info ]
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| #41 | 37973 | SHAFT, SHIFT - LOWER (1 required per assembly) |
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37973 - SHAFT [ More info ] Unavailable |
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65028 - Shift Shaft Note: Priced Individually [ More info ] Unavailable |
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66066 - Shift Shaft, Priced Individually [ More info ] Unavailable |
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77481 - Shift Shaft - Lower [ More info ] Unavailable |
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77481 1 - Shift Shaft - Lower [ More info ]
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18-2150 - Shaft, 77481-1 [ More info ]
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| #42 | 18-20233 | CLIP, RETAINING - SHIFT SHAFT (1 required per assembly) |
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18-20233 - Pin, Hair-Ext, Priced Individually [ More info ]
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53-29641 - E Ring - Priced Individually [ More info ]
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18-4295-9 - Clip, 53-29461, 2PK [ More info ]
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| #43 | 25-25439 | "O" RING, SHIFT SHAFT BUSHING (1 required per assembly) |
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25-25439 - O-Ring, Shaft Shaft Bushing [ More info ]
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18-7420-9 - O-Ring (PK5) 25-21836 [ More info ]
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| #44 | 23-30617A 1 | BUSHING ASSEMBLY, SHIFT SHAFT (1 required per assembly) |
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23-30617A 1 - Bushing [ More info ] Unavailable |
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23-30617A 2 - Bushing Assembly [ More info ] Unavailable |
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23-8M0112749 - Shift Shaft Bushing ZZ [ More info ]
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18-2154 - Bushing, 23-30617A2 [ More info ]
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| #45 | 26-31249 | OIL SEAL, SHIFT SHAFT BUSHING (1 required per assembly) |
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26-31249 - Oil Seal - Priced Individually [ More info ] Unavailable |
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26-46021 - Oil Seal - Priced Individually [ More info ] Unavailable |
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26-89236 1 - Seal [ More info ]
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18-2009 - Seal, 26-89236 [ More info ]
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| #46 | 12-31266 | WASHER, RUBBER - SHIFT SHAFT BUSHING (1 required per assembly) |
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12-31266 - Washer (rubber) [ More info ]
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| #47 | 12-29395 | WASHER, SHIFT SHAFT (1 required per assembly) |
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12-29395 - Washer, (.390 X 1.00 X .06) [ More info ]
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12-8M0042641 - Washer [ More info ]
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18-4267-9 - Washer, 12-29395, 2PK [ More info ]
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| #48 | 10-28634 | SCREW, GEAR HOUSING GREASE FILLER AND VENT HOLE (2 required per assembly) |
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10-28634 - Drain Screw ONLY, Priced Individually [ More info ] Unavailable |
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10-79953 - Drain Screw ONLY, Priced Individually [ More info ] Unavailable |
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10-79953A 2 - Drain Screw Kit [ More info ] Unavailable |
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10-79953Q 2 - Screw Kit - Priced Individually [ More info ] Unavailable |
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10-79953Q04 - Screw Kit - Priced Individually [ More info ]
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18-2244 - Plug Kit, 10-79953A2 [ More info ]
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10-79953K04 - Drain Screw - Priced Individually [ More info ]
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| #49 | 12-20260 | WASHER, GEAR HOUSING GREASE FILLER AND VENT HOLE SCREW (2 required per assembly) |
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12-20260 - Sealing Washer [ More info ] Unavailable |
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12-19183 - Washer (3/8 Inch Screw) [ More info ] Unavailable |
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12-19183 2 - Washer - Priced Individually [ More info ] Unavailable |
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12-19183 3 - Seal -Blue - Priced Individually [ More info ]
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18-2945-9 - Gasket 12-19183 2-Pack [ More info ]
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12-19183Q02 - Seals, Pack of 4 (yes this is actually a pack of 4) [ More info ]
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12-19183K02 - Seal, Pack of 4 [ More info ]
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| #50 | 10-29608 | SCREW, GEAR HOUSING FLUSHING HOLE (1 required per assembly) |
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10-29608 - Screw, NLA [ More info ]
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| #51 | 27-29586 | GASKET, GEAR HOUSING FLUSHING HOLE SCREW (1 required per assembly) |
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27-29586 - Gear Housing Flushing Hole Screw Gasket [ More info ]
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27-8M0214916 - GASKET @5 [ More info ] Unavailable |
| #52 | 26-29612 | SEAL, GEAR HOUSING FLUSHING HOLE SCREW (1 required per assembly) |
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26-29612 - Seal - Priced Individually [ More info ]
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26-8M0214917 - SEAL @5 [ More info ] Unavailable |
