Lower Unit / Gearcase
AssemblyGearcase with drive train, prop shaft, water pump, and propeller. A full specification article for this item is being written. Meanwhile its bill of materials and connections are below.
Lower Unit / Gearcase parts and their functions
9 top-level parts · 19 parts in total · full bill of materials below
| # | Part | Qty | What it does |
|---|---|---|---|
| 1 | Gearbox Housing | 1× | Rigid cast housing that holds the gears and bearings in alignment, contains the lubricant, and mounts the gearbox to the machine. |
| 2 | Drive Shaft | 1× | Vertical input drive shaft. |
| 3 | Pinion & Gear Set 2 parts | 1× | Forward/reverse bevel gear set. |
| 4 | Propeller Shaft | 1× | Horizontal output prop shaft. |
| 5 | Water Pump 4 parts | 1× | Raw-water impeller pump for cooling. |
| 6 | Propeller 2 parts | 1× | Stainless 3-blade propeller with hub. |
| 7 | Ball Bearing | 4× | Deep-groove radial ball bearing. |
| 8 | Oil Seal | 3× | Spring-loaded rotary lip seal that keeps lubricant inside a housing and dirt out where a shaft passes through, sized to DIN 3760. |
| 9 | O-Ring Set | 1× | Set of elastomer rings seated in grooves to seal static or slow-moving joints against fluid and gas, sized to ISO 3601. |
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Bill of materials for Lower Unit / Gearcase
9 top-level lines · 17 rows shown · 19 parts total · indented to 3 levels| # | Item / sub-assembly | Part no. | Qty/assy | Ext. qty | Parts | Type |
|---|---|---|---|---|---|---|
| 1 | Gearbox Housing | gearbox-housing | 1× | 1 | · | part |
| 2 | Drive Shaft | outboard-boat-motor-drive-shaft | 1× | 1 | · | part |
| 3 | Pinion & Gear Set 2 parts | outboard-boat-motor-pinion-gear-set | 1× | 1 | 2 | assembly |
| 3.1 | Helical Gear Pair | gear-pair | 1× | 1 | · | part |
| 3.2 | Shift Dog Clutch | outboard-boat-motor-shift-clutch | 1× | 1 | · | part |
| 4 | Propeller Shaft | outboard-boat-motor-propeller-shaft | 1× | 1 | · | part |
| 5 | Water Pump 4 parts | outboard-boat-motor-water-pump | 1× | 1 | 4 | assembly |
| 5.1 | Water Pump Impeller | outboard-boat-motor-impeller | 1× | 1 | · | part |
| 5.2 | Pump Housing | outboard-boat-motor-pump-housing | 1× | 1 | · | part |
| 5.3 | Thermostat | outboard-boat-motor-thermostat | 1× | 1 | · | part |
| 5.4 | O-Ring Set | oring-set | 1× | 1 | · | part |
| 6 | Propeller 2 parts | outboard-boat-motor-propeller | 1× | 1 | 2 | assembly |
| 6.1 | Blade & Hub | outboard-boat-motor-prop-blade-hub | 1× | 1 | · | part |
| 6.2 | Prop Nut & Washer | outboard-boat-motor-prop-nut | 1× | 1 | · | part |
| 7 | Ball Bearing | ball-bearing | 4× | 4 | · | part |
| 8 | Oil Seal | oil-seal | 3× | 3 | · | part |
| 9 | O-Ring Set | oring-set | 1× | 1 | · | part |
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Where the lower unit / gearcase is used
1 product across 1 domain contain it, directly or inside a sub-assemblyUsed in 1 assembly
Sourcing: possible vendors
Browse the supplier directory → Prices, MOQ, and lead times are algorithmic estimates, not quotes, and not claims about these companies. Company mappings are curated by keyword; est. price band $1–$300. How estimates work| Vendor | HQ | Specialty | MOQ | Lead time |
|---|---|---|---|---|
| sonacomstar.com ↗ | Gurugram, IN | EV driveline & motors | 1,000 pcs | 8–12 wks |
| shdrive.cn ↗ | Yuhuan, CN | Gears & driveline | 1,000 pcs | 8–12 wks |
| bharatgears.com ↗ | Mumbai, IN | Automotive gears | 1,000 pcs | 8–12 wks |
|
🇮🇳ZF India
zf.com ↗
|
Pune, IN | Driveline & chassis | 1,000 pcs | 8–12 wks |
| advancegroup.cn ↗ | Hangzhou, CN | Gearboxes | 1,000 pcs | 8–12 wks |