Parts for MerCruiser 140 GM 181 I / L4 1972-1978 Cylinder Block, Piston & Bearings
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Reference numbers in this diagram can be found in a light blue row below — scroll down to order.
# | 19-37531 | PLUG, OIL CHANNEL - CYLINDER BLOCK (1 required per assembly) |
# | 34543 | VALVE, BY-PASS - OIL FILTER (1 required per assembly) |
#1 | 839-3814 | CYLINDER BLOCK ASSEMBLY (SEE NOTE BELOW) (1 required per assembly) |
839-3814 - CYL. BLOCK,NLA [ More info ] Unavailable |
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#2 | 19-34270 | PLUG, EXPANSION - CYLINDER BLOCK (1 5/8" DIA.) (2 required per assembly) |
#2 | 19-34271 | PLUG, EXPANSION - CYLINDER BLOCK (2" DIA.) (1 required per assembly) |
19-34271 - Plug [ More info ] Unavailable |
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#3 | 19-34488 | PLUG, EXPANSION - CAMSHAFT BEARING HOLE (1 required per assembly) |
#4 | 19-34487 | PLUG, PIPE - CYLINDER BLOCK (3/8") (1 required per assembly) |
#6 | 17-35465 | PIN, DOWEL - CYLINDER BLOCK TO CYLINDER HEAD (2 required per assembly) |
#7 | 23-35168 | BEARING, DISTRIBUTOR PILOT SHAFT (1 required per assembly) |
23-35168 - Bearing, NLA [ More info ] Unavailable |
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#8 & 9 | BEARING, CAMSHAFT (SEE M/C SERVICE BULLETIN 83-19) (1 required per assembly) | |
#10 | 733-3819 | PISTON AND PISTON PIN ASSEMBLY (STANDARD) (4 required per assembly) |
733-3819 1 - Piston [ More info ] Unavailable |
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#10 | 733-3818 | PISTON AND PISTON PIN ASSEMBLY (.020 O.S.) (AR required per assembly) |
733-3818 - Piston [ More info ] Unavailable |
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#11 | 39-65153 | RING, PISTON - 4 SETS (STANDARD) (4 required per assembly) |
#11 | 39-67125 | RING, PISTON - 4 SETS (.020 O.S.) (AR required per assembly) SERIAL 03332138-00346207 |
39-67125 - Rings - .020 [ More info ] Unavailable |
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#11 | 39-66217 | RING, PISTON - 4 SETS (.020 O.S.) (AR required per assembly) SERIAL 03462608-09999999 |
#12 | 23-52256 | BEARING UNIT, CRANKSHAFT MAIN (STANDARD) (4 required per assembly) |
23-52256 - Bearing Unit - Crankshaft Main - Standard [ More info ] Unavailable |
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#12 | 23-52257 | BEARING UNIT, CRANKSHAFT MAIN (.001 U.S.) (AR required per assembly) |
23-52257 - Bearing Unit - Crankshaft Main - .001 US [ More info ] |
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#12 | 23-52258 | BEARING UNIT, CRANKSHAFT MAIN (.002 U.S.) (AR required per assembly) |
23-52258 - Bearing Unit [ More info ] Unavailable |
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#12 | 23-52259 | BEARING UNIT, CRANKSHAFT MAIN (.010 U.S.) (AR required per assembly) |
23-52259 - Bearing Unit - Crankshaft Main - .010 US [ More info ] Unavailable |
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#12 | 23-52260 | BEARING UNIT, CRANKSHAFT MAIN (.020 U.S.) (AR required per assembly) |
23-52260 - Ord 23-818472, NLA [ More info ] Unavailable |
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#13 | 23-52261 | BEARING UNIT, CRANKSHAFT MAIN - REAR (STANDARD) (1 required per assembly) |
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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#13 | 23-52262 | BEARING UNIT, CRANKSHAFT MAIN - REAR (.001 U.S.) (AR required per assembly) |
23-52262 - 23818470 [ More info ] Unavailable |
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23-818470 - Bearing Set - .001 US [ More info ] Unavailable |
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23-818470001 - Bearing Set [ More info ] Unavailable |
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#13 | 23-52263 | BEARING UNIT, CRANKSHAFT MAIN - REAR (.002 U.S.) (AR required per assembly) |
23-52263 - Bearing, NLA [ More info ] Unavailable |
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23-85671 - Bearing, NLA [ More info ] Unavailable |
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#13 | 23-52264 | BEARING UNIT, CRANKSHAFT MAIN - REAR (.010 U.S.) (AR required per assembly) |
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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#13 | 23-52265 | BEARING UNIT, CRANKSHAFT MAIN - REAR (.020 U.S.) (AR required per assembly) |
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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#14 | 49954 | CAP, REAR - CRANKSHAFT BEARING (1 required per assembly) |
49954 - GM# 3928975,NLA [ More info ] Unavailable |
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#15 | 35310 | CAP, INTERMEDIATE AND FRONT - CRANKSHAFT BEARING (4 required per assembly) |
35310 - Cap [ More info ] Unavailable |
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#16 | 10-46717 | BOLT, CRANKSHAFT BEARING CAP TO CYLINDER BLOCK (2 31/32") (10 required per assembly) |
10-46717 - ,NLA [ More info ] Unavailable |
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#16 | 16-48350 | STUD, OIL PUMP SCREEN SUPPORT TO BEARING CAP (1 required per assembly) |
16-48350 - Stud [ More info ] Unavailable |
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#17 | 26-58203 | OIL SEAL UNIT, CRANKSHAFT REAR BEARING (1 required per assembly) |
#18 | 22-64425 | FITTING, EXTENSION - CYLINDER BLOCK (1 required per assembly) |
#19 | 22-64426 | FITTING, DRAIN - CYLINDER BLOCK (1 required per assembly) |
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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22-16951T 1 - Drain Plug - Priced Individually [ More info ] |