Yamaha Gearcase Exploded View Diagram and Parts
Fits 85&90 HP
| Figure # | Description | O.E.M. # | Sierra # | Qty. |
| 1 | Gearcase | 6H1-45301-04-EK | | 1 |
| 2 | Drive Shaft | 6H1-45501-11-00 | | 1 |
| 3 | Key, Impeller | 90280-04M04-00 | 18-3301 1 | 1 |
| 4 | Bearing, Upper Drive Shaft | 93332-000U3-00 | | 1 |
| 5 | Shim Drive Shaft 0.10mm) | 688-45587-01-10 | | AR |
| 5 | Shim Drive Shaft (0.12mm) | 688-45587-01-12 | | AR |
| 5 | Shim Drive Shaft (0.15mm) | 688-45587-01-15 | | AR |
| 5 | Shim Drive Shaft (0.18mm) | 688-45587-01-18 | | AR |
| 5 | Shim Drive Shaft (0.30mm) | 688-45587-01-30 | | AR |
| 5 | Shim Drive Shaft (0.40mm) | 688-45587-01-40 | | AR |
| 5 | Shim Drive Shaft (0.50mm) | 688-45587-01-50 | | AR |
| 6 | Sleeve, Drive shaft | 688-45536-01-00 | | 1 |
| 7 | Bearing, Pinion | 93315-325V1-00 | | 1 |
| 8 | Shim Forward Gear (0.10mm) | 688-45567-01-10 | | AR |
| 8 | Shim Forward Gear (0.12mm) | 688-45567-01-12 | | AR |
| 8 | Shim Forward Gear (0.15mm) | 688-45567-01-15 | | AR |
| 8 | Shim Forward Gear (0.18mm) | 688-45567-01-18 | | AR |
| 8 | Shim Forward Gear (0.30mm) | 688-45567-01-30 | | AR |
| 8 | Shim Forward Gear (0.40mm) | 688-45567-01-40 | | AR |
| 8 | Shim Forward Gear (0.50mm) | 688-45567-01-50 | | AR |
| 9 | Shaft, Propeller | 6H1-45611-01-00 | | 1 |
| 10 | Clutch, Dog | 6H1-45631-01-00 | | 1 |
| 11 | Spring, Cross Pin | 688-45633-00-00 | | 1 |
| 12 | Pin, Cross | 90250-07M02-00 | | 1 |
| 13 | Gear, Forward | 688-45560-00-00 | | 1 |
| 14 | Bearing, Forward Gear | 93332-000W7-00 | | 1 |
| 15 | Shim Reverse Gear (0.10mm) | 688-45577-01-10 | | AR |
| 15 | Shim Reverse Gear (0.12mm) | 688-45577-01-12 | | AR |
| 15 | Shim Reverse Gear (0.18mm) | 688-4557-01-18 | | AR |
| 15 | Shim Reverse Gear (0.30mm) | 688-4557-01-30 | | AR |
| 15 | Shim Reverse Gear (0.40mm) | 688-45577-01-40 | | AR |
| 15 | Shim Reverse Gear (0.50mm) | 688-45577-01-50 | | AR |
| 16 | Gear, Pinion | 688-45551-01-00 | | 1 |
| 17 | Nut, Pinion | 90170-16M01-00 | | 1 |
| 18 | Trim Tab | 988-45371-02-00 | 18-6070 | 1 |
| 19 | Washer, Thrust | 688-45576-00-00 | | 1 |
| 20 | Plug, Drain | 688-45341-00-00 | | 1 |
| 21 | Gasket, Vent & Drain Plugs | 90430-08020-00 | | 3 |
| 22 | Gear, Reverse | 6H1-45571-00-00 | | 1 |
| 23 | Bearing, Reverse Gear | 93306-207U0-00 | | 1 |
| 24 | O-Ring, Bearing Housing | 93210-85M97-00 | | 1 |
| 25 | Housing, Bearing | 688-45331-00-94 | | 1 |
| 26 | Bearing, Needle | 93317-325U0-00 | | 1 |
| 27 | Oil Seal 18-0587 | 93101-25M03-00 | 18-05872 | 2 |
| 28 | Washer, Tab | 688-45383-02-00 | | 1 |
| 29 | Nut, Cover | 688-45384-00-00 | | 1 |
| 30 | Spacer, Forward | 688-45987-01-00 | | 1 |
| 31 | Spacer | 688-45997-01-00 | 18-4274 | 1 |
| 32 | Washer, Propeller | 90201-17M00-00 | | 1 |
| 33 | Nut, Castle | 90171-16011-00 | | 1 |
| 34 | Pin, Cotter | 91490-40030-00 | 18-3735 | 1 |
| 35 | Washer | 90202-12060-00 | | 1 |
| 36 | Gasket | 90430-12072-00 | | 1 |
| 37 | Damper, Water Seal | 663-44367-00-00 | | 1 |
| 38 | Grommet | 90480-19M06-00 | | 1 |
| 39 | Damper, Water Seal | 663-44366-00-00 | 18-0280 | 2 |
| 40 | Bolt, Water Pump | 97395-08070-00 | | 2 |
| 41 | Bolt, Water Pump | 97395-08050-00 | | 2 |
| 42 | Washer, Water Pump | 90209-08M02-00 | | 4 |
| 43 | Housing, Water Pump | 688-44311-01-00 | 18-3171 | 1 |
| 44 | Insert, Water Pump | 688-44322-00-00 | | 1 |
| 45 | Impeller | 688-44352-03-00 | 18-3070 1 | 1 |
| 46 | Gasket, Wear Plate | | | |
| 47 | Wear Plate | 688-44323-00-00 | 18-3341 1 | 1 |
| 48 | Gasket, Wear Plate to Base | 688-44324-A0-00 | | 1 |
| 49 | O-Ring, Base | 68844341-01-94 | 18-7436 1 2 | 1 |
| 53 | Oil Seal, Shift Shaft | 93106-09014-00 | 18-0267 2 | 1 |
| 54 | O-Ring | 93210-49046-00 | | 1 |
| 55 | O-Ring | 93210-07540-00 | | 1 |
| 56 | Water Pump Repair Kit | 692-W0078-00-00 | 18-3370 | 1 |
| 57 | Gear Housing Seal Kit | 688-W0001-20-00 | 18-2798 | 1 |
| 1 | Contents of Gear Housing Seal Kit 18-2798 |
| 2 | Contents of Water Pump Repair Kit 18-3370 |
| AR | As required |
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