Parts for 300 (3.0L EFI) Supermagnum 2-Stroke EFI Mercury Outboard Motor Gear Housing Driveshaft-Standard / Counter-Sportmaster
Reference numbers in this diagram can be found in a light blue row below — scroll down to order.
| #- | 816575A6 | SEAL KIT-G/H (1 required per assembly) |
| #- | 817275A5 | REBUILD KIT-W/P (1 required per assembly) |
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46-46502 - Mercury Mercruiser Water Pump Kit with Housing and Seal Carrier, 817275A4 [ More info ] |
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| #1 | 840306T3 | GEAR HOUSING-SM Standard Rotation [0G980649] & Below (1 required per assembly) — Replaces: 849014T2 |
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1688-840306T 3 - Gear Housing Assembly [ More info ] Unavailable |
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| #1 | 840307T3 | GEAR HOUSING-SM Counter Rotation [0G980649] & Below (1 required per assembly) — Replaces: 849015T2 |
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1688-840307T 3 - Gear Housing Assembly [ More info ] Unavailable |
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| #2 | 379721 | PIN (1 required per assembly) |
| #3 | 826134Q | ANODE (2 required per assembly) — Replaces: 826134 |
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97-826134Q - Anode, Aluminum, Outboard Side Pocket, Priced Individually [ More info ] |
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97-826134T - Anode - Outboard Side Pocket - Priced Individually [ More info ] |
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| #4 | 4000333 | SCREW (M6 X 40) (1 required per assembly) |
| #5 | 401386 | NUT (M6) STAINLESS STEEL (1 required per assembly) — Replaces: 8268336, 40144 |
| #6 | 42647A1 | BEARING ASSEMBLY ROLLER (1 required per assembly) |
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31-02762 - Bearing, 31-42647A1, 387817 [ More info ]
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| #7 | 43044 | PIN DOWEL - WITHOUT HOLE (.375 X .625) (2 required per assembly) |
| #8 | 79953Q04 | SCREW-DRAIN @2 (1 required per assembly) — Replaces: 79953A2, 79953Q2 |
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10-79953K04 - Drain Screw - Priced Individually [ More info ] |
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| #9 | 191833 | SEAL (1 required per assembly) — Replaces: 19183, 191832 |
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12-19183 3 - Seal -Blue - Priced Individually [ More info ] Unavailable |
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12-19183Q02 - Seals, Pack of 4 (yes this is actually a pack of 4) [ More info ] |
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| #10 | NSS | NOT SOLD SEPARATE PINION GEAR Part of Forward Gear Sets (1 required per assembly) |
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NSS - NOT SOLD SEPARATE [ More info ] Unavailable |
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| #11 | 92721 | WASHER @2 (1 required per assembly) |
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18-2359 - Nut Kit [ More info ]
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| #12 | 35921 | NUT @5 (1 required per assembly) |
| #13 | 824145 | SHIFT SHAFT (LOWER) (1 required per assembly) |
| #14 | 848836A1 | BUSHING KIT (1 required per assembly) |
| #15 | 8M0204708 | SEAL (1 required per assembly) — Replaces: 8164641 |
| #16 | 36318 | O-RING (.799) (1 required per assembly) |
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25-8M0214927 - O RING @5 [ More info ] Unavailable |
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| #17 | 82130016 | SCREW @5 (2 required per assembly) |
| #18 | 77674 | WASHER (1 required per assembly) |
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18-2316-9 - Washer, 12-77674, 5PK [ More info ]
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| #19 | 848831 | DRIVESHAFT (LOWER) (1 required per assembly) |
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45-848831 - Drive Shaft [ More info ] Unavailable |
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| #20 | 8M0204723 | KEY @2 (1 required per assembly) — Replaces: 43037, 8M0032833 |
| #21 | 8M0063268 | SHIM SET (1 required per assembly) — Replaces: 38657A1 |
| #22 | 8M0146553 | BEARING ASSY (1 required per assembly) — Replaces: 48939A2 |
| #23 | 8M0063267 | SHIM SET (1 required per assembly) — Replaces: 42637A1 |
| #24 | 8M0146566 | BEARING CUP CONE (1 required per assembly) — Replaces: 36387A1 |
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318M0146566 - Upper Driveshaft Bearing [ More info ]
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| #25 | 8245191 | RETAINER (1 required per assembly) — Replaces: 824519 |
| #26 | 807929A1 | CARRIER ASSY (1 required per assembly) |
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807929A 1 - Carrier Assembly [ More info ] Unavailable |
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93-02638 - Seal Carrier Assembly Mercury Mariner V6, 807929A 1 [ More info ] |
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| #27 | 8M0142854 | O RING (2.175 X .103) (1 required per assembly) — Replaces: 90011, 896523 |
| #28 | 66302 | SEAL OIL (1 required per assembly) |
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26-8M0214939 - Carrier Oil Seal, Priced Individually [ More info ] |
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| #29 | 66302 | SEAL OIL (1 required per assembly) |
| #30 | 817275A1 | HOUSING KIT-W/P (1 required per assembly) |
| #31 | 816575A2 | SEAL KIT (1 required per assembly) |
| #32 | 430331 | GASKET (1 required per assembly) |
| #33 | 8172771 | GASKET (1 required per assembly) |
| #34 | 8M0204709 | FACEPLATE-W/P (1 required per assembly) — Replaces: 8172761 |
| #35 | 43026T2 | IMPELLER-W/P (1 required per assembly) — Replaces: 430262 |
| #36 | 82130020 | SCREW @5 (6 required per assembly) |
| #37 | 832942A1 | COUPLING KIT (1 required per assembly) |
| #38 | 8M0204645 | O RING (1 required per assembly) — Replaces: 21836 |
| #39 | 8M0204654 | O RING @10 (1 required per assembly) — Replaces: 35027 |
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25-8M0204654 - O RING @10 [ More info ] Unavailable |
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| #40 | 848832A1 | DRIVESHAFT ASSEMBLY (UPPER) (LONG) (1 required per assembly) |
| #40 | 827755A1 | EXTENSION KIT DRIVESHAFT (UPPER) (X-LONG) (1 required per assembly) |
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45-827755A 1 - Extension Kit-XL [ More info ] Unavailable |
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| #41 | 823902 | COUPLING (1 required per assembly) |
| #42 | 848834 | PLATE (1 required per assembly) |
| #43 | 848835 | GASKET (1 required per assembly) |






