Parts for MerCruiser 120 GM 153 I / L4 1972-1978 Cylinder Block, Piston & Bearings
Reference numbers in this diagram can be found in a light blue row below — scroll down to order.
| # | 15-34533 | SHIM UNIT, BEARING CAP - FRONT AND INTERMEDIATE (AR required per assembly) |
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15-34533 - Shim, NLA [ More info ]
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| # | 34543 | VALVE, BY-PASS - OIL FILTER (AR required per assembly) |
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| # | 19-37831 | PLUG, OIL CHANNEL - CYLINDER BLOCK (1 required per assembly) |
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25-37831 - O RING [ More info ] Unavailable |
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25-20034 - , O-Ring [ More info ]
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| # | 15-34534 | SHIM UNIT, BEARING CAP -REAR (AR required per assembly) |
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15-34534 - Shim Unit [ More info ] Unavailable |
| #1 | 839-3548 | CYLINDER BLOCK ASSEMBLY (1 required per assembly) SEE NOTE |
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839-3548 - Ord 87956A, NLA [ More info ] Unavailable |
| #2 | 19-34270 | PLUG, EXPANSION - CYLINDER BLOCK (1 5/8"DIA.) (2 required per assembly) |
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19-34270 - Freeze Plug, 1-5/8 Inch [ More info ]
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| #2 | 19-34271 | PLUG, EXPANSION - CYLINDER BLOCK (2"DIA.) (1 required per assembly) |
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19-34271 - Plug [ More info ] Unavailable |
| #3 | 19-34488 | PLUG, EXPANSION - CAMSHAFT BEARING HOLE (1 required per assembly) |
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| #4 | 19-34487 | PLUG, PIPE - CYLINDER BLOCK (3/8") (1 required per assembly) |
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228M0204657 - PLUG [ More info ]
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| #5 | 17-35465 | PIN, DOWEL -CYLINDER BLOCK TO CYLINDER HEAD (2 required per assembly) |
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17-35465 - Dowel Pin (5/16, Dia.) [ More info ]
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| #6 | 23-35168 | BEARING, DISTRIBUTOR PILOT SHAFT (1 required per assembly) |
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23-35168 - Bearing, NLA [ More info ] Unavailable |
| #7&8 | BEARING, CAMSHAFT (1 required per assembly) SEE M/C SERVICE BULLETIN 83-19 | |
| #9 | 736-2343 | PISTON AND PISTON PIN ASSEMBLY (.001 O.S.) (AR required per assembly) |
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736-2343 - Piston & Pin - Std [ More info ]
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| #9 | 733-2279 | PISTON AND PISTON PIN ASSEMBLY (.030 O.S.) (AR required per assembly) |
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733-2279 - Piston & Pin -.030, NLA [ More info ]
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| #10 | 39-67119 | RING,PISTON (STANDARD) (4 required per assembly) SERIAL 03377341-03506318 |
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39-67119 - Piston Ring - Priced Individually [ More info ]
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39-67132 - Piston Ring - Std [ More info ] Unavailable |
| #10 | 39-67121 | RING, PISTON (.030 O.S.) (AR required per assembly) SERIAL 03377341-03506318 |
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39-67121 - Piston Ring -.030, NLA [ More info ] Unavailable |
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39-67134 - Piston Ring -.030, NLA [ More info ]
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| #10 | 39-67132 | RING, PISTON (STANDARD) (4 required per assembly) SERIAL 03506319-09999999 |
| #10 | 39-67134 | RING, PISTON (.030 O.S.) (AR required per assembly) SERIAL 03506319-09999999 |
| #11 | 23-52256 | BEARING UNIT, CRANLSHAFT MAIN (STANDARD) (4 required per assembly) |
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23-52256 - Bearing Unit - Crankshaft Main - Standard [ More info ] Unavailable |
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23-85675 - Er 23-818469 , NLA [ More info ]
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| #11 | 23-52257 | BEARING UNIT, CRANKSHAFT MAIN (.001 U.S.) (AR required per assembly) |
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23-52257 - Bearing Unit - Crankshaft Main - .001 US [ More info ]
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23-85676 - Ord 23-818470 [ More info ]
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| #11 | 23-52258 | BEARING UNIT, CRANKSHAFT MAIN (.002 U.S.) (AR required per assembly) |
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23-52258 - Bearing Unit [ More info ] Unavailable |
| #11 | 23-52259 | BEARING UNIT, CRANKSHAFT MAIN (.010 U.S.) (AR required per assembly) |
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23-52259 - Bearing Unit - Crankshaft Main - .010 US [ More info ] Unavailable |
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23-85713 - Ord 23-818471 [ More info ]
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| #11 | 23-52260 | BEARING UNIT, CRANKSHAFT MAIN (.020 U.S.) (AR required per assembly) |
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23-52260 - Ord 23-818472, NLA [ More info ] Unavailable |
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23-85714 - Ord 23-818472, NLA [ More info ]
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| #12 | 23-52261 | BEARING UNIT, CRANKSHAFT MAIN - REAR (STANDARD) (1 required per assembly) |
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23-52261 - Bearing Unit - Crankshaft Main - Rear - Standard [ More info ] Unavailable |
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23-85715 - Bearing - Crankshaft Main - Rear Standard [ More info ]
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23-818469 - Bearing Set - Standard [ More info ] Unavailable |
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23-818469001 - Bearing Set [ More info ]
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| #12 | 23-52262 | BEARING UNIT, CRANKSHAFT MAIN - REAR (.001 U.S.) (AR required per assembly) |
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23-52262 - 23818470 [ More info ] Unavailable |
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23-85670 - Bearing Unit - Crankshaft Main [ More info ]
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23-818470 - Bearing Set - .001 US [ More info ] Unavailable |
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23-818470001 - Bearing Set [ More info ] Unavailable |
| #12 | 23-52263 | BEARING UNIT, CRANKSHAFT MAIN - REAR (.002 U.S.) (AR required per assembly) |
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23-52263 - Bearing, NLA [ More info ] Unavailable |
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23-85671 - Bearing, NLA [ More info ] Unavailable |
| #12 | 23-52264 | BEARING UNIT, CRANKSHAFT MAIN - REAR (.010 U.S.) (AR required per assembly) |
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23-52264 - 23818471 [ More info ] Unavailable |
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23-85718 - Bearing - Crankshaft Main - Rear .010 US [ More info ]
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23-818471 - Bearing Set -.010 US [ More info ] Unavailable |
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23-818471001 - Bearing Set -.010 [ More info ]
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| #12 | 23-52265 | BEARING UNIT, CRANKSHAFT MAIN - REAR (.020 U.S.) (AR required per assembly) |
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23-52265 - 23818472 [ More info ] Unavailable |
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23-85719 - Bearing - Crankshaft Main - Rear .020 US [ More info ] Unavailable |
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23-818472 - Bearing Set -.020 US [ More info ]
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| #13 | 49954 | CAP, REAR - CRANKSHAFT BEARING (1 required per assembly) |
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49954 - GM# 3928975,NLA [ More info ] Unavailable |
| #14 | 35310 | CAP, INTERMEDIATE AND FRONT - CRANKSHAFT BEARING (4 required per assembly) |
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35310 - Cap [ More info ] Unavailable |
| #15 | 10-46717 | BOLT, BEARING CAP TO BLOCK (2 31/32") (10 required per assembly) SERIAL 03377341-03825578 |
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10-46717 - ,NLA [ More info ] Unavailable |
| #16 | 16-48350 | STUD, BEARING CAP AND OIL PUMP ATTACHING (AR required per assembly) SERIAL 03825579-09999999 |
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16-48350 - Stud [ More info ] Unavailable |
| #17 | 26-58203 | OIL SEAL UNIT, CRANKSHAFT REAR BEARING (1 required per assembly) |
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26-58203 - Oil Seal [ More info ]
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26-814622 - Seal [ More info ]
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| #18 | 22-64425 | FITTING, EXTENTION - CYLINDER BLOCK (1 required per assembly) |
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22-64425 - Fitting, NLA [ More info ]
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| #19 | 22-64426 | FITTING, DRAIN - CYLINDER BLOCK (1 required per assembly) |
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22-64426 - Drain Cock [ More info ] Unavailable |
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22-87238 - Drain Cock [ More info ] Unavailable |
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22-16951A 1 - Drain Plug Kit [ More info ] Unavailable |
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22-16951Q 1 - Drain Plug - Priced Individually [ More info ]
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18-4218 - Drain 22-16951A1 [ More info ]
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22-16951T 1 - Drain Plug - Priced Individually [ More info ]
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