Parts for MerCruiser 8.1L Inboard (Base) Block, Camshaft & Pistons
Reference numbers in this diagram can be found in a light blue row below — scroll down to order.
| #NS | 865519A01 | LONGBLOCK ASSEMBLY, Base (1 required per assembly) (Block Codes 4WW and 4WY) |
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865519A01 - 865519A01 - LONGBLOCK ASSEMBL O [ More info ] Unavailable Replaced by -865752A01 |
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865752A01 - LONGBLOCK ASSEMBL O NLA [ More info ] Unavailable |
| #NS | 865752A01 | LONGBLOCK ASSEMBLY, Base (1 required per assembly) (Block Codes 4ZW and 4ZY) |
| #NS | 865521A01 | LONGBLOCK ASSEMBLY, H.O. (1 required per assembly) (Block Codes 4WA and 4WF) |
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865521A01 - 865521A01 - LONGBLOCK ASSEMBL O [ More info ] Unavailable Replaced by -865754A01 |
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865754A01 - LONGBLOCK ASSEMBL O NLA [ More info ] Unavailable |
| #NS | 865754A01 | LONGBLOCK ASSEMBLY, H.O. (1 required per assembly) (Block Codes 4ZA and 4ZF) |
| #3 | 22-883919 | PLUG, Coolant Drain (1 required per assembly) |
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22-883919 - 22-883919 - PLUG O [ More info ] Unavailable Replaced by 22-8M0114498 |
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22-8M0114498 - DRAIN PLUG O [ More info ] Unavailable |
| #4 | 881669 | DRIVE, Oil Pump, Oil Pump (1 required per assembly) |
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881669 - 881669 - DRIVE Oil Pump O [ More info ] Unavailable Replaced by -8M0045287 |
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8M0045287 - 8M0045287 - DRIVE Oil Pump O [ More info ] Unavailable Replaced by -8M0099549 |
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8M0099549 - 8M0099549 - DRIVER Oil Pump O [ More info ] Unavailable Replaced by -8M0114791 |
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8M0114791 - DRIVER Oil Pump O [ More info ] Unavailable |
| #5 | 10-881595 | SCREW, (M6 x 21), Oil Pump (1 required per assembly) |
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10-881595 - Bolt [ More info ]
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| #6 | 17-845758 | PIN, Dowel, Cylinder Head Locating (4 required per assembly) |
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17-845758 - Pin -Dowel [ More info ]
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17-52190 - Pin -Dowel [ More info ]
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| #7 | 881667 | SENSOR, Crankshaft Position (1 required per assembly) |
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892617 - CrankShaft Sensor [ More info ]
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| #10 | 11-68219 | NUT, (#10-32) Stainless Steel (1 required per assembly) |
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11-68219 - Nut - Priced Individually [ More info ]
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| #11 | 22-805563 | CONNECTOR, (.500 Inch NPTF To .500 Inch Inverted Flare) (1 required per assembly) |
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22-805563 - Fitting [ More info ]
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| #12 | 878187 | SENSOR ASSEMBLY, Knock (2 required per assembly) |
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878187 - 878187 - SENSOR ASSEMBLY K O [ More info ] In stock  Replaced by -8M6003194 |
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8M6003194 - Knock Sensor [ More info ]
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18-7554 - Knock Sensor 878187 [ More info ]
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| #13 | 87-815425T | SENDER ASSEMBLY, Oil Pressure (1 required per assembly) |
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815425T - 815425T - SENDER ASSEMBLY O [ More info ] Unavailable Replaced by -8M0068784 |
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8M0068784 - Sender Assembly [ More info ]
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18-5899 - Sender, 982650, 815425T [ More info ]
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| #14 | 22-881568 | PLUG, Engine Coolant (1 required per assembly) |
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22-881568 - Plug [ More info ]
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| #14 | 22-881569 | PLUG, (.250-18 x .54), Engine Coolant (1 required per assembly) |
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22-881569 - Plug [ More info ]
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| #15 | 17-35312 | PIN, Dowel (1/4 n. Diameter) (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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| #16 | 23-881659 | BEARING, Camshaft (1 required per assembly) (pos 1) |
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23-881659 - BEARING O NLA [ More info ] Unavailable |
| #17 | 23-881660 | BEARING, Camshaft (2 required per assembly) (pos 2 / 5) |
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23-881660 - BEARING O NLA [ More info ] Unavailable |
| #18 | 23-881661 | BEARING, Camshaft (2 required per assembly) (pos 3 / 4) |
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23-881661 - BEARING O NLA [ More info ] Unavailable |
| #19 | 19-94140 | EXPANSION PLUG, Camshaft Bearing Hole (1 required per assembly) |
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| #20 | 431-881627 | CAMSHAFT (1 required per assembly) (Base) |
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431-881627 - CamShaft [ More info ]
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| #20 | 431-881628 | CAMSHAFT (1 required per assembly) (H.O.) |
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431-881628 - CamShaft [ More info ]
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| #22 | 845941 | RETAINER, Camshaft (1 required per assembly) |
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845941 - Retainer [ More info ]
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| #23 | 10-881588 | SCREW (1 required per assembly) |
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10-881588 - Bolt [ More info ]
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| #24 | 892640 | SPROCKET, Camshaft (1 required per assembly) |
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892640 - 892640 - SPROCKET O [ More info ] Unavailable Replaced by -892640001 |
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892640001 - CamShaft Sprocket [ More info ]
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| #25 | 10-881570 | SCREW, (M8 x 25) (3 required per assembly) |
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10-881570 - Bolt [ More info ]
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| #26 | 881626 | CHAIN, Camshaft Timing (1 required per assembly) |
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| #27 | 735-881592 | PISTON ASSEMBLY, Standard (Starboard) (4 required per assembly) SN# BASE 0W020104 / H.O. 0W020080 & Below |
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735-881592 - 735-881592 - PISTON ASSEMBLY S O [ More info ] Unavailable Replaced by 735-881592002 |
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735-881592002 - Piston - Std - Stbd [ More info ]
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| #27 | 735-881592002 | PISTON ASSEMBLY, Standard/Floating Design (Starboard) (4 required per assembly) SN# BASE 0W020105 / H.O. 0W020081 & Up |
| #27 | 735-881592001 | PISTON ASSEMBLY, Standard/Floating Design (Starboard) (4 required per assembly) SN# BASE 0W020105 / H.O. 0W020081 & Up |
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735-881592001 - PISTON ASSEMBLY S O NLA [ More info ] Unavailable |
| #27 | 735-883515 | PISTON ASSEMBLY, Standard (Port) (4 required per assembly) SN# BASE 0W020104 / H.O. 0W020080 & Below |
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735-883515 - 735-883515 - PISTON ASSEMBLY S O [ More info ] Unavailable Replaced by 735-883515002 |
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735-883515002 - Piston - Std - Port [ More info ]
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| #27 | 735-883515002 | PISTON ASSEMBLY, Standard/Floating Design (Port) (4 required per assembly) SN# BASE 0W020105 / H.O. 0W020081 & Up |
| #27 | 735-883515001 | PISTON ASSEMBLY, Standard/Floating Design (Port) (4 required per assembly) SN# BASE 0W020105 / H.O. 0W020081 & Up |
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735-883515001 - PISTON ASSEMBLY S O NLA [ More info ] Unavailable |
| #27 | 735-881596 | PISTON ASSEMBLY, .030 Oversize (Starboard) (AR required per assembly) SN# BASE 0W020104 / H.O. 0W020080 & Below |
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735-881596 - 735-881596 - PISTON ASSEMBLY . O [ More info ] Unavailable Replaced by 735-881596002 |
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735-881596002 - Piston - 030- Stbd [ More info ]
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| #27 | 735-881596002 | PISTON ASSEMBLY, .030/Floating Design (Starboard) (AR required per assembly) SN# BASE 0W020105 / H.O. 0W020081 & Up |
| #27 | 735-881596001 | PISTON ASSEMBLY, .030/Floating Design, Without Connecting Rod(Starboard) (AR required per assembly) SN# BASE 0W020105 / H.O. 0W020081 & Up |
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735-881596001 - PISTON ASSEMBLY . O NLA [ More info ] Unavailable |
| #27 | 735-881597 | PISTON ASSEMBLY, .030 Oversize (Port) (AR required per assembly) SN# BASE 0W020104 / H.O. 0W020080 & Below |
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735-881597 - 735-881597 - PISTON ASSEMBLY . O [ More info ] Unavailable Replaced by 735-881597002 |
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735-881597002 - Piston - 030- Port [ More info ]
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| #27 | 735-881597002 | PISTON ASSEMBLY, .030/Floating Design (Port) (AR required per assembly) SN# BASE 0W020105 / H.O. 0W020081 & Up |
| #27 | 735-881597001 | PISTON ASSEMBLY, .030/Floating Design, Without Connecting Rod(Port) (AR required per assembly) SN# BASE 0W020105 / H.O. 0W020081 & Up |
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735-881597001 - PISTON ASSEMBLY . O NLA [ More info ] Unavailable |
| #28 | NSS | NOT SOLD SEPARATE, Connecting Rod (8 required per assembly) SN# BASE 0W020104 / H.O. 0W020080 & Below |
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NSS - NOT SOLD SEPARATE O [ More info ] Unavailable |
| #29 | 10-883917 | SCREW, Connecting Rod (16 required per assembly) |
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10-883917 - Bolt [ More info ]
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| #30 | 11-883918 | NUT, Connecting Rod (16 required per assembly) |
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| #31 | 39-881601 | RING KIT, Piston(Standard) (8 required per assembly) |
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39-881601 - Ring Kit - Std [ More info ]
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| #31 | 39-881602 | RING KIT, Piston (8 required per assembly) (.030 Over Size) |
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39-881602 - Ring Kit -.030 Os [ More info ]
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| #32 | 23-883239 | BEARING, Connecting Rod (8 required per assembly) |
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23-883239 - 23-883239 - BEARING O [ More info ] Unavailable Replaced by 23-883239 1 |
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23-883239 1 - Bearing Kit [ More info ]
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| #33 | 22-881567 | PLUG, Oil Galley (4 required per assembly) |
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22-881567 - 22-881567 - PLUG O [ More info ] Unavailable Replaced by 22-881567001 |
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22-881567001 - Plug [ More info ]
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| #34 | 22-881598 | PLUG, Oil Galley (3 required per assembly) |
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22-881598 - 22-881598 - PLUG O [ More info ] Unavailable Replaced by 22-48341 |
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22-48341 - Part, NLA [ More info ]
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| #35 | 22-48341 | PLUG, (.125-27 x .375), Oil Galley (AR required per assembly) |
| #35 | 22-34487 | PLUG, (.375-18 x .42), Pipe - Oil Galley (2 required per assembly) |
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| #35 | 22-48340 | PLUG, (.250-18 x .41), Oil Galley (1 required per assembly) |
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22-32561 - Plug - Priced Individually [ More info ]
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| #36 | 883514 | PUMP, Circulating |
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883514 - 883514 - PUMP O [ More info ] Unavailable Replaced by -883925 |
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883925 - 883925 - PUMP * [ More info ] Unavailable Replaced by 46-8M0113736 |
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46-8M0113736 - CIRCULATING Water Pump-8.1L [ More info ]
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18-3573 - Circulating Pump, 883925 [ More info ]
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| #37 | 27-881603 | GASKET, Circulating Pump (2 required per assembly) |
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27-881603 - Gasket [ More info ]
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27-881603001 - Gasket [ More info ]
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| #38 | 862583 | PULLEY, Circulating Pump (1 required per assembly) |
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862583 - Circulating Pump Pulley [ More info ]
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| #39 | 10-40107 16 | SCREW, (M8 x 16) (4 required per assembly) |
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10-40107 16 - Screw [ More info ]
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| #40 | 10-881576 | SCREW, (M10 x 65) (3 required per assembly) |
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10-881576 - Bolt [ More info ]
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| #40 | 10-884036 | SCREW, (M10 x 95) (1 required per assembly) |
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10-884036 - Screw [ More info ]
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| #41 | 16-862915 | STUD, (.250-18/M10 Special), Knock Sensor (2 required per assembly) |
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16-862915 - Stud [ More info ]
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| #42 | 11-826292 | NUT, (M10) Brass/Nickel Plated, Knock Sensor (2 required per assembly) |
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| #43 | 881879A 6 | SENSOR, (0 - 100 PSI), Oil Pressure (1 required per assembly) |
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881879A 6 - 881879A 6 - SENSOR (0 - 100 P O [ More info ] Unavailable Replaced by -881879011 |
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881879011 - 881879011 - SENSOR Pressure ( O [ More info ] Unavailable Replaced by -881879T11 |
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881879T11 - Pressure Sensor [ More info ]
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| #44 | 22-29085 | FITTING, Elbow (45 Degree) (2 required per assembly) |
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22-29085 - Fitting [ More info ]
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22-8M0109010 - FITTING Elbow (45 O [ More info ] Unavailable |
| #45 | 22-64013 | FITTING, (.375 Male To .125 Female) (1 required per assembly) |
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22-64013 - Reducer [ More info ]
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| #46 | 22-805059 | FITTING, Reducer Bushing (1 required per assembly) |
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22-805059 - Bushing [ More info ]
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| #47 | 13-26996 | LOCKWASHER, (#10) Stainless Steel (1 required per assembly) |
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13-26996 - LockWasher - Priced Individually [ More info ]
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| #48 | 22-38407 | PLUG, (.500-14), Pipe (1 required per assembly) |
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