Parts for MerCruiser 270 (2 Barrel.) GM 350 V-8 1969-1972 Cylinder Block, Pistons & Crankshaft
Reference numbers in this diagram can be found in a light blue row below — scroll down to order.
| #1 | 841-4301 | CYLINDER BLOCK ASSEMBLY (1 required per assembly) |
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841-4301 - NLA O NLA [ More info ] Unavailable |
| #2 | 19-35308 | PLUG, EXPANSION - CYLINDER BLOCK (1 1/4") (2 required per assembly) |
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19-35308 - Expansion P, NLA [ More info ]
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| #3 | 22-36382 | PLUG, WATER DRAIN - CYLINDER BLOCK (2 required per assembly) |
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18-8111-9 - Pipe Plug, 1/4 Inch, (Pack of 3) [ More info ]
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18-4256 - Plug, 1/4 Inch Brass, Sold Individually [ More info ]
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| #4 | 19-34270 | PLUG, EXPANSION - CYLINDER BLOCK (1 5/8" DIA.) (8 required per assembly) |
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19-34270 - Freeze Plug, 1-5/8 Inch [ More info ]
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| #4 | 19-45670 | PLUG, EXPANSION - CYLINDER BLOCK (1/2" DIA.) (6 required per assembly) |
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19-45670 - Plug, NLA [ More info ]
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| #4 | 22-48340 | PLUG, PIPE - CYLINDER BLOCK (1/4"DIA.) (3 required per assembly) |
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22-32561 - Plug - Priced Individually [ More info ]
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| #5 | 17-35465 | PIN, DOWEL - CYLINDER BLOCK TO CYLINDER HEAD (5/16"DIA.) (4 required per assembly) |
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17-35465 - Pin -Dowel - Priced Individually [ More info ]
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| #6 | 19-34488 | PLUG, EXPANSION - CAMSHAFT BEARING HOLE (1 required per assembly) |
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| #7 | 23-34984 | BEARING UNIT, CAMSHAFT (FRONT) (1 required per assembly) |
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23-34984 - 23-34984 - BEARING O [ More info ] Unavailable Replaced by 23-85674 |
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23-85674 - Bearings, Set of 5 [ More info ]
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| #8 | 23-34985 | BEARING UNIT, CAMSHAFT (FRONT INTERMEDIATE AND REAR) (2 required per assembly) |
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23-34985 - 23- 85N/A 88 ORD [ More info ]
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| #9 | 23-34986 | BEARING UNIT, CAMSHAFT (CENTER AND REAR INTERMEDIATE) (2 required per assembly) |
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23-34986 - 23- 85N/A 88 ORD [ More info ]
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| #10 | 735-4303 | PISTON AND PISTON PIN ASSEMBLY (.001 O.S.) (AR required per assembly) -USE STANDARD RING |
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735-4303 - Piston, NLA [ More info ]
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| #10 | 735-4304 | PISTON AND PISTON PIN ASSEMBLY (.020 O.S.) (AR required per assembly) |
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735-4304 - NLA O NLA [ More info ] Unavailable |
| #10 | 735-4305 | PISTON AND PISTON PIN ASSEMBLY (.030 O.S.) (AR required per assembly) |
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735-4305 - GM# 3947789 O NLA [ More info ] Unavailable |
| #11 | 39-34988 | RING, PISTON - 8 SETS (STANDARD) (1 required per assembly) |
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39-34988 - Piston Ring Unit [ More info ]
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39-67123 - Piston Ring [ More info ]
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39-17464 - Rings - Standard [ More info ]
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18-3937 - Rings 39-17464 Standard Set [ More info ]
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| #11 | 39-48344 | RING, PISTON - 8 SETS (.020 O.S.) (AR required per assembly) |
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39-48344 - 39-48344 - PISTON RING UNIT O [ More info ] Unavailable Replaced by 39-67125 |
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39-67125 - 39-67125 - PISTON RING @2 O [ More info ] Unavailable Replaced by 39-66217 |
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39-66217 - Rings - .020 [ More info ]
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18-3939 - Rings, 39-66217 [ More info ]
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| #11 | 39-48345 | RING, PISTON - 8 SETS (.030 O.S.) (AR required per assembly) |
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39-48345 - 39-48345 - PISTON RING UNIT O [ More info ] Unavailable Replaced by 39-67126 |
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39-67126 - Piston Ring [ More info ]
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39-17465 - Rings - .030 Oversize [ More info ]
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18-3938 - Rings, 39-17465 - Special Order - No Returns [ More info ]
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| #12 | 23-52205 | BEARING UNIT, CRANKSHAFT MAIN (STANDARD) (4 required per assembly) |
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23-52205 - 23-52205 - BEARING UNIT O [ More info ] Unavailable Replaced by 23-85694 |
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23-85694 - Bearing, NLA [ More info ]
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| #12 | 23-52206 | BEARING UNIT, CRANKSHAFT MAIN (.001 U.S.) (AR required per assembly) |
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23-52206 - 23-52206 - BEARING UNIT O [ More info ] Unavailable Replaced by 23-85695 |
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23-85695 - BEARING O NLA [ More info ] Unavailable |
| #12 | 23-52207 | BEARING UNIT, CRANKSHAFT MAIN (.002 U.S.) (AR required per assembly) |
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23-52207 - NLA O NLA [ More info ] Unavailable |
| #12 | 23-52209 | BEARING UNIT, CRANKSHAFT MAIN (.010 U.S.) (AR required per assembly) |
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23-52209 - 23-52209 - BEARING UNIT O [ More info ] Unavailable Replaced by 23-85696 |
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23-85696 - BEARING O NLA [ More info ] Unavailable |
| #12 | 23-52210 | BEARING UNIT, CRANKSHAFT MAIN (.020 U.S.) (AR required per assembly) |
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23-52210 - 23-52210 - BEARING UNIT O [ More info ] Unavailable Replaced by 23-85697 |
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23-85697 - BEARING O NLA [ More info ] Unavailable |
| #13 | 23-52211 | BEARING UNIT, CRANKSHAFT MAIN - REAR (STANDARD) (1 required per assembly) |
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23-52211 - 23-52211 - BEARING UNIT O [ More info ] Unavailable Replaced by 23-85698 |
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23-85698 - Bearing [ More info ]
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23-818465 - Bearing Set [ More info ]
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18-1300 - Main Bearings [ More info ]
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| #13 | 23-52212 | BEARING UNIT, CRANKSHAFT MAIN - REAR (.001 U.S.) (AR required per assembly) |
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23-52212 - 23-52212 - BEARING UNIT O [ More info ] Unavailable Replaced by 23-85699 |
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23-85699 - 23-85699 - BEARING O [ More info ] Unavailable Replaced by 23-818466 |
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23-818466 - Bearing Set [ More info ]
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| #13 | 23-52213 | BEARING UNIT, CRANKSHAFT MAIN - REAR (.002 U.S.) (AR required per assembly) |
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23-52213 - NLA O NLA [ More info ] Unavailable |
| #13 | 23-52215 | BEARING UNIT, CRANKSHAFT MAIN - REAR (.010 U.S.) (AR required per assembly) |
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23-52215 - 23-52215 - BEARING UNIT O [ More info ] Unavailable Replaced by 23-85700 |
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23-85700 - 23-85700 - BEARING O [ More info ] Unavailable Replaced by 23-818467 |
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23-818467 - Bearing Set [ More info ]
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| #13 | 23-52216 | BEARING UNIT, CRANKSHAFT MAIN - REAR (.020 U.S.) (AR required per assembly) |
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23-52216 - 23-52216 - BEARING O [ More info ] Unavailable Replaced by 23-818468 |
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23-818468 - Bearing Set [ More info ]
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| #14 | 17-24813 | PIN, DOWEL - REAR CRANKSHAFT BEARING CAP (1/4" DIA.) (1 required per assembly) |
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17-24813 - PIN (1/4 In.) O NLA [ More info ] Unavailable |
| #15 | 26-58203 | OIL SEAL, REAR CRANKSHAFT CRANKSHAFT BEARING CAP (2 required per assembly) (LEFT HAND CRANKSHAFT) |
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26-58203 - Oil Seal [ More info ]
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26-814622 - Seal [ More info ]
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18-1211 - Seal, 26-814622 [ More info ]
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| #15 | 26-35313 | OIL SEAL, REAR CRANKSHAFT CRANKSHAFT BEARING CAP (2 required per assembly) (RIGHT HAND CRANKSHAFT) |
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26-35313 - Seal, Rr Main, NLA [ More info ]
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| #16 | 52217 | CAP, REAR - CRANKSHAFT BEARING (1 required per assembly) |
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52217 - NLA O NLA [ More info ] Unavailable |
| #17 | 58213 | CAP, INTERMEDIATE - CRANKSHAFT BEARING (3 required per assembly) |
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58213 - Part, NLA [ More info ]
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| #18 | 54789 | CAP, FRONT - CRANKSHAFT BEARING (1 required per assembly) |
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54789 - NLA O NLA [ More info ] Unavailable |
| #19 | 10-54788 | BOLT, CRANKSHAFT BEARING CAP TO CYLINDER BLOCK (2 31/32") (5 required per assembly) |
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10-54788 - BOLT O NLA [ More info ] Unavailable |
| #19 | 10-49106 | BOLT, CRANKSHAFT BEARING CAP TO CYLINDER BLOCK (2 1/2") (6 required per assembly) |
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10-49106 - Screw [ More info ]
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10-845706 - 10-845706 - SCREW O [ More info ] Unavailable Replaced by 10-845706M 2 |
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10-845706M 2 - SCREW (.438-14 x O NLA [ More info ] Unavailable |
| #20 | 16-54790 | STUD, OIL PAN BAFFLE ATTACHING (5 required per assembly) |
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| #21 | 34282 | LIFTER, HYDRAULIC VALVE - TAPPET (16 required per assembly) |
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34282 - 34282 - LIFTER O [ More info ] Unavailable Replaced by -72638 |
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72638 - Hydraulic Lifter [ More info ]
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18-1402 - Lifter, 72638 [ More info ]
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| #22 | 230-3829 | FLYWHEEL ASSEMBLY (1 required per assembly) |
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230-3829 - 230-3829 - FLYWHEEL O [ More info ] Unavailable Replaced by 230-4614 |
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230-4614 - FLYWHEEL ASSEMBLY O NLA [ More info ] Unavailable |
| #23 | 13-39131 | LOCKWASHER, FLYWHEEL SCREW (6 required per assembly) |
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13-39131 - LockWasher [ More info ]
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| #24 | 10-49845 | SCREW, FLYWHEEL TO CRANKSHAFT (6 required per assembly) |
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10-49845 - 10-49845 - SCREW (.437-20 x O [ More info ] Unavailable Replaced by 10-845757 |
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10-845757 - Screw [ More info ]
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| #25 | 47608 | DRIVE PLATE, FLYWHEEL (1 required per assembly) |
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47608 - 47608 - DRIVE PLATE O [ More info ] Unavailable Replaced by -47608A 1 |
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47608A 1 - Plate Assembly [ More info ]
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| #26 | 10-35091 | SCREW, DRIVE PLATE TO FLYWHEEL (6 required per assembly) |
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10-35091 - Screw - Priced Individually [ More info ]
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| #27 | 13-35048 | LOCKWASHER, DRIVE PLATE SCREW (6 required per assembly) |
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13-35048 - LockWasher - Priced Individually [ More info ]
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| #28 | 614-3595 | CONNECTING ROD ASSEMBLY (8 required per assembly) |
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614-3595 - Connecting Rod Assembly [ More info ]
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614-8164 - 614-8164 - CONNECTING ROD O [ More info ] Unavailable Replaced by 614-8164T |
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614-8164T - Connecting Rod Assembly [ More info ]
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| #29 | 10-52220 | BOLT, CONNECTING ROD CAP (16 required per assembly) |
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10-52220 - 10-52220 - BOLT O [ More info ] Unavailable Replaced by 10-85802 |
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10-85802 - Screw [ More info ]
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| #30 | 11-37493 | NUT, CONNECTING ROD CAP BOLT (16 required per assembly) |
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| #31 | 23-52221 | BEARING SET (4 PAIR), CONNECTING ROD (STANDARD) (1 required per assembly) |
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23-52221 - 23-52221 - BEARING UNIT O [ More info ] Unavailable Replaced by 23-85701 |
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23-85701 - Bearing - Std [ More info ]
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18-1308 - Rod Bearing, 23-85701, Standard [ More info ]
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| #31 | 23-52222 | BEARING UNIT (PAIR), CONNECTING ROD (.001 U.S.) (AR required per assembly) |
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23-52222 - 23-52222 - BEARING UNIT O [ More info ] Unavailable Replaced by 23-85702 |
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23-85702 - Bearing [ More info ]
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| #31 | 23-52223 | BEARING UNIT (PAIR), CONNECTING ROD (.002 U.S.) (AR required per assembly) |
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23-52223 - 23-52223 - BEARING UNIT O [ More info ] Unavailable Replaced by 23-85703 |
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23-85703 - Bearing [ More info ]
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| #31 | 23-52224 | BEARING UNIT (PAIR), CONNECTING ROD (.010 U.S.) (AR required per assembly) |
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23-52224 - 23-52224 - BEARING UNIT O [ More info ] Unavailable Replaced by 23-85704 |
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23-85704 - Bearing -.010 Us [ More info ]
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18-1309 - Rod Bearings, 23-85704 [ More info ]
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| #31 | 23-52225 | BEARING UNIT (PAIR), CONNECTING ROD (.020 U.S.) (AR required per assembly) |
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23-52225 - 23-52225 - BEARING UNIT O [ More info ] Unavailable Replaced by 23-85705 |
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23-85705 - Bearing -.020 Us [ More info ]
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18-1341 - Rod Bearing, 23-85705 [ More info ]
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| #32 | 431-3355 | CAMSHAFT (LEFT HAND CRANKSHAFT ROTATION) (1 required per assembly) |
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431-3355 - CamShaft, NLA [ More info ]
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| #32 | 431-3357 | CAMSHAFT (RIGHT HAND CRANKSHAFT ROTATION) (1 required per assembly) |
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431-3357 - 431-3357 - CAMSHAFT O [ More info ] Unavailable Replaced by 431-884035 |
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431-884035 - CAMSHAFT O NLA [ More info ] Unavailable |
| #33 | 35378 | CHAIN, CAMSHAFT TIMING (1 required per assembly) LEFT HAND CRANKSHAFT ROTATION |
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35378 - Camshaft Timing Chain, NLA [ More info ]
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| #34 | 43-35338 | SPROCKET, CAMSHAFT TIMING (44 TEETH) (1 required per assembly) LEFT HAND CRANKSHAFT ROTATION |
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43-35338 - SPROCKET O NLA [ More info ] Unavailable |
| #35 | 43-48338 | SPROCKET, CRANKSHAFT TIMING (22 TEETH) (1 required per assembly) LEFT HAND CRANKSHAFT ROTATION |
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43-48338 - 43-48338 - SPROCKET O [ More info ] Unavailable Replaced by -17161A 1 |
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17161A 1 - CHAIN KIT-TIMING O NLA [ More info ] Unavailable |
| #34 | 43-48356 | GEAR, CAMSHAFT TIMING (58 TEETH) (1 required per assembly) RIGHT HAND CRANKSHAFT ROTATION |
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43-48356 - GEAR O NLA [ More info ] Unavailable |
| #35 | 43-48334 | GEAR, CRANKSHSFT TIMING (29 TEETH) (1 required per assembly) RIGHT HAND CRANKSHAFT ROTATION |
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43-48334 - Timing Gear [ More info ]
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43-14324 - Gear Set [ More info ]
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| #36 | 10-34505 | BOLT, CAMSHAFT TIMING SPROCKET (3/4") (3 required per assembly) |
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10-34505 - Screw [ More info ]
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| #36 | 12-39167 | WASHER, CAMSHAFT TIMING SPROCKET BOLT (3 required per assembly) |
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12-39167 - Washer [ More info ]
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12-848136 - Washer [ More info ]
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| #37 | 17-35312 | PIN, DOWEL - CAMSHAFT TIMING SPROCKET (1/4" DIA.) (1 required per assembly) |
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17-35312 - 17-35312 - PIN Dowel (1/4 In O [ More info ] Unavailable Replaced by 17-843378 |
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17-843378 - Pin -Dowel [ More info ]
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| #38 | 429-4302 | CRANKSHAFT (1 required per assembly) |
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429-4302 - NLA O NLA [ More info ] Unavailable |
| #39 | 28-34466 | KEY, CRANKSHAFT PULLEY AND BALANCER (2 required per assembly) |
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| #40 | 52198 | BAFFLE, OIL PAN (CYLINDER BLOCK) (1 required per assembly) |
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52198 - Oil Baffle, NLA [ More info ]
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| #41 | 11-37500 | NUT, BAFFLE TO CYLINDER BLOCK STUD (5 required per assembly) |
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| #42 | 47549 | OIL PAN (1 required per assembly) |
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47549 - 47549 - OIL PAN O [ More info ] Unavailable Replaced by -71872A 1 |
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71872A 1 - 71872A 1 - OIL PAN ASSY O [ More info ] Unavailable Replaced by -87758A 1 |
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87758A 1 - PAN ASSEMBLY Oil O NLA [ More info ] Unavailable |
| #43 | 27-52236 | GASKET SET, OIL PAN (1 required per assembly) |
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27-52236 - Gasket Set, NLA [ More info ]
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| #44 | 10-55714 | SCREW, OIL PAN TO CYLINDER BLOCK (5/16 - 18 x 7/8) (4 required per assembly) |
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10-55714 - Screw - Priced Individually [ More info ]
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| #45 | 10-55715 | SCREW, OIL PAN TO CYLINDER BLOCK (1/4 - 20 x 7/8) (6 required per assembly) |
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10-55715 - Screw - Priced Individually [ More info ]
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| #46 | 12-46897 | WASHER, OIL PAN SCREW (6 required per assembly) |
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12-46897 - Washer [ More info ]
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| #47 | 22-36373 | PLUG, PIPE - OIL PAN DRAIN (1 required per assembly) |
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| #48 | 22-47625 | ELBOW, OIL LEVEL GAUGE TUBE TL OIL PAN (1 required per assembly) |
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22-47625 - Elbow, NLA [ More info ]
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| #49 | 11-47626 | NUT, OIL LEVEL GAUGE TUBE (1 required per assembly) |
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11-47626 - Nut, NLA [ More info ]
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| #50 | 47492 | TUBE, OIL LEVEL GAUGE (1 required per assembly) |
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47492 - 47492 - TUBE O [ More info ] Unavailable Replaced by -47492A 3 |
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86890A 1 - 86890A 1 - TUBE O [ More info ] Unavailable Replaced by -86890A 2 |
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86890A 2 - Tube Assembly [ More info ]
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| #51 | 48133 | BRACKET, OIL LEVEL GAUGE TUBE CLIP (1 required per assembly) |
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48133 - BRACKET O NLA [ More info ] Unavailable |
| #52 | 54-47545 | CLIP, OIL LEVEL GAUGE TUBE (1 required per assembly) |
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54-47545 1 - Clip [ More info ]
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| #53 | 10-33524 | SCREW, OIL LEVER GAUGE TUBE CLIP TO BRACKET (5/8") (1 required per assembly) |
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10-33524 - Screw - Priced Individually [ More info ]
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| #54 | 13-39107 | LOCKWASHER, OIL LEVEL GAUGE TUBE CLIP SCREW (1 required per assembly) |
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13-39107 - LockWasher - Priced Individually [ More info ]
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| #55 | 11-22053 | NUT, OIL LEVEL GAUGE TUBE SCREW (1 required per assembly) |
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11-22053 - Nut - Priced Individually [ More info ]
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| #56 | 49457 | GAUGE, OIL LEVEL (DIPSTICK)-STERN DRIVE (1 required per assembly) |
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49457 - 49457 - GAUGE O [ More info ] Unavailable Replaced by -49457A 1 |
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49457A 1 - Dipstick Assembly, NLA [ More info ]
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861942 19 - Oil Gauge, NLA [ More info ]
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| #56 | 48394 | GAUGE, OIL LEVEL (DIPSTICK)-STERN DRIVE (1 required per assembly) |
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48394 - DIP STICK O NLA [ More info ] Unavailable |
