YamahaOutboard Lower Gearcase Parts Diagram
The diagram below is applicable for the following models:
- 85 HP
- 90 HP
| Ref | Description | Part # | Replaces | Qty |
|---|---|---|---|---|
| 1 | Gearcase | - | 6H1-45301-04-EK | 1 |
| 2 | Shift shaft oil seal | SIERRA-18-0267 | 93106-09014-00 | 1 |
| 3 | Shift rod plate | - | 688-45321-00-00 | 1 |
| 4 | Shift rod retainer bolt | - | 97395-06016-00 | 2 |
| 5 | Washer | - | 92990-06600-00 | 2 |
| 6 | O-ring | - | 93210-49046-00 | 1 |
| 7 | O-ring | - | 93210-07540-01 | 1 |
| 8 | Circlip | - | 99001-08600-00 | 1 |
| 9 | Shift rod | - | 6H1-44144-00-00 | 1 |
| 10 | Circlip | - | 93450-07M00-00 | 1 |
| 11 | Pinion bearing | - | 93315-325V1-00 | 1 |
| 12 | Drive shaft sleeve | - | 688-45536-01-00 | 1 |
| 13 | Drive shaft shim (0.10mm) | - | 688-45587-01-10 | AR |
| Drive shaft shim (0.12mm) | - | 688-45587-01-12 | AR | |
| Drive shaft shim (0.15mm) | - | 688-45587-01-15 | AR | |
| Drive shaft shim (0.18mm) | - | 688-45587-01-18 | AR | |
| Drive shaft shim (0.30mm) | - | 688-45587-01-30 | AR | |
| Drive shaft shim (0.40mm) | - | 688-45587-01-40 | AR | |
| Drive shaft shim (0.50mm) | - | 688-45587-01-50 | AR | |
| 14 | Upper drive shaft bearing | - | 93332-000U3-00 | 1 |
| 15 | Impeller key | SIERRA-18-3301 | 90280-04M04-00 | 1 |
| 16 | Drive shaft | - | 6H1-45501-11-00 | 1 |
| 17 | Pump base oil seal | SIERRA-18-0587 | 93101-25M03-00 | 2 |
| 18 | Base o-ring | SIERRA-18-7436 | 93210-46044-00 | 1 |
| 19 | Base gasket | SIERRA-18-0240 | 688-44316-A0-00 | 1 |
| 20 | Water pump base | - | 688-44341-01-94 | 1 |
| 21 | Wear plate to base gasket | - | 688-44324-A0-00 | 1 |
| 22 | Wear plate | SIERRA-18-3341 | 688-44323-00-00 | 1 |
| 23 | Wear plate to housing gasket | SIERRA-18-0239 | 688-44315-A0-00 | 1 |
| 24 | Pin | - | 93604-10M03-00 | 1 |
| 25 | Impeller | SIERRA-18-3070 | 688-44352-03-00 | 1 |
| 26 | Water pump insert | - | 688-44322-00-00 | 1 |
| 27 | Water pump housing | SIERRA-18-3171 | 688-44311-01-00 | 1 |
| 28 | Water pump bolt | - | 97395-08070-00 | 2 |
| 29 | Water pump bolt | - | 97395-08050-00 | 2 |
| 30 | Water pump washer | - | 90209-08M02-00 | 4 |
| 31 | Water pump washer | - | 90209-08M02-00 | 4 |
| 32 | Hose nipple | - | 6E5-45378-00-00 | 1 |
| 33 | Drain plug | SIERRA-18-2371 | 90340-08M04-00 | 1 |
| 34 | Vent & drain plugs gasket | SIERRA-18-46981-9 | 90430-08020-00 | 1 |
| 35 | Drain plug | SIERRA-18-2371 | 90340-08M04-00 | 1 |
| 36 | Vent & drain plugs gasket | SIERRA-18-46981-9 | 90430-08020-00 | 1 |
| 37 | Drain plug | SIERRA-18-2371 | 90340-08M04-00 | 1 |
| 38 | Vent & drain plugs gasket | SIERRA-18-46981-9 | 90430-08020-00 | 1 |
| 39 | Bolt | - | 97395-10040-00 | 2 |
| 40 | Lock washer | - | 92990-10100-00 | 2 |
| 41 | Flat washer | - | 92990-10600-00 | 2 |
| 42 | Bolt | - | 97395-10040-00 | 2 |
| 43 | Lock washer | - | 92990-10100-00 | 2 |
| 44 | Flat washer | - | 92990-10600-00 | 2 |
| 45 | Bolt | - | 97395-08060-00 | 1 |
| 46 | Lock washer | - | 92990-08100-00 | 1 |
| 47 | Lock washer | - | 92990-08100-00 | 1 |
| 48 | Water inlet cover (port) | - | 688-45214-02-00 | 1 |
| 49 | Water inlet cover (starboard) | - | 688-45215-02-00 | 1 |
| 50 | Water inlet screw | - | 98680-05545-00 | 1 |
| 51 | Water inlet nut | - | 90185-05002-00 | 1 |
| 52 | Trim tab | SIERRA-18-6070 | 688-45371-02-00 | 1 |
| 53 | Anode mounting bolt | - | 90105-10M00-00 | 1 |
| 54 | Pinion nut | - | 90170-16M01-00 | 1 |
| 55 | Pinion gear | - | 688-45551-01-00 | 1 |
| 56 | Shifter | - | 6H1-45641-01-00 | 1 |
| 57 | Shift cam | - | 6H1-44151-00-00 | 1 |
| 58 | Shift slide | - | 6H1-45634-02-00 | 1 |
| 59 | Pin | - | 93603-12M11-00 | 1 |
| 60 | Spring nut | - | 90183-02M03-00 | 1 |
| 61 | Shift plunger | - | 6H1-45635-00-00 | 1 |
| 62 | Shaft | - | 6H1-45668-00-00 | 1 |
| 63 | Shift plunger | - | 6H1-45635-00-00 | 1 |
| 64 | Compression spring | - | 90501-12M48-00 | 1 |
| 65 | Plate washer | - | 90201-03313-00 | 1 |
| 66 | Spring nut | - | 90183-02M03-00 | 1 |
| 67 | Compression spring | - | 90501-16M65-00 | 1 |
| 68 | Forward gear shim (0.10mm) | - | 688-45567-01-10 | AR |
| Forward gear shim (0.12mm) | - | 688-45567-01-12 | AR | |
| Forward gear shim (0.15mm) | - | 688-45567-01-15 | AR | |
| Forward gear shim (0.18mm) | - | 688-45567-01-18 | AR | |
| Forward gear shim (0.30mm) | - | 688-45567-01-30 | AR | |
| Forward gear shim (0.40mm) | - | 688-45567-01-40 | AR | |
| Forward gear shim (0.50mm) | - | 688-45567-01-50 | AR | |
| 69 | Forward gear bearing | - | 93332-000W7-00 | 1 |
| 70 | Forward gear | - | 688-45560-00-00 | 1 |
| 71 | Clutch dog | - | 6H1-45631-01-00 | 1 |
| 72 | Cross pin | - | 90250-07M02-00 | 1 |
| 73 | Cross pin spring | - | 688-45633-00-00 | 1 |
| 74 | Propeller shaft | - | 6H1-45611-01-00 | 1 |
| 75 | Reverse gear | - | 6H1-45571-00-00 | 1 |
| 76 | Reverse gear shim (0.10mm) | - | 688-45577-01-10 | AR |
| Reverse gear shim (0.12mm) | - | 688-45577-01-12 | AR | |
| Reverse gear shim (0.15mm) | - | 688-45577-01-15 | AR | |
| Reverse gear shim (0.18mm) | - | 688-45577-01-18 | AR | |
| Reverse gear shim (0.30mm) | - | 688-45577-01-30 | AR | |
| Reverse gear shim (0.40mm) | - | 688-45577-01-40 | AR | |
| Reverse gear shim (0.50mm) | - | 688-45577-01-50 | AR | |
| 77 | Thrust washer | - | 688-45576-00-00 | 1 |
| 78 | Reverse gear bearing | - | 93306-207U0-00 | 1 |
| 79 | Bearing housing o-ring | - | 93210-85M97-00 | 1 |
| 80 | Bearing housing | SIERRA-18-2782 | 688-45331-00-94 | 1 |
| 81 | Key | - | 90282-04010-00 | 1 |
| 82 | Needle bearing | - | 93317-325U0-00 | 1 |
| 83 | Oil seal | SIERRA-18-0587 | 93101-25M03-00 | 2 |
| 84 | Tab washer | - | 688-45383-02-00 | 1 |
| 85 | Cover nut | - | 688-45384-00-00 | 1 |
| 86 | Forward spacer | - | 688-45987-01-00 | 1 |
| 87 | Spacer | SIERRA-18-4274 | 688-45997-01-00 | 1 |
| 88 | Propeller washer | - | 90201-17M00-00 | 1 |
| 89 | Castle nut | SIERRA-18-3732 | 90171-16011-00 | 1 |
| 90 | Cotter pin | SIERRA-18-3735 | 91490-40030-00 | 1 |
| 91 | Water pump repair kit | SIERRA-18-3370 | 692-W0078-00-00 | 1 |
| 92 | Gear housing seal kit | SIERRA-18-2798 | 688-W0001-20-00 | 1 |
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