Genuine Tohatsu Outboard Oil Seal 309-00122-0 (15x25x5mm) 2.5HP-6HP Marine
309-00122-0
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Tohatsu Oil Seal 309-00122-0
Genuine Marine Gearcase Protection
This genuine Tohatsu Oil Seal (SKU: 309-00122-0) is a critical component for the maintenance of your outboard's lower unit. This seal is specifically designed to withstand the harsh marine environment, ensuring gear oil remains contained while preventing corrosive salt water from entering the gearcase.
Key Features
- ✔ Genuine Tohatsu factory part
- ✔ Corrosion-resistant internal spring
- ✔ Precision double-lip design
Technical Specs
| Inner Diameter (ID) | 15 mm |
| Outer Diameter (OD) | 25 mm |
| Width/Thickness | 5 mm |
Compatibility / Fitment Guide
| Model | Power | Engine type |
|---|---|---|
| Tohatsu M2.5 | 2.5 HP | 2-stroke |
| Tohatsu 2.5HP-6HP | 2.5-6 HP | — |
How to check before ordering: the part number on your old part should be 309-00122-0 (or a superseding number). If you are not sure, send us your engine model and serial number (on the plate on the engine bracket) and we will confirm fitment before you order. Tohatsu often uses the same part on related models, so this list may not be complete.
OEM Cross Reference
| Tohatsu / Nissan | 309-00122-0, 309001220, 309001220M |
| Mercury Marine | 26-16130, 26-161301 |
| Sierra Marine | 18-2051 |
Questions & Answers
Is this a genuine original part?
Yes, this is an authentic OEM Tohatsu component sourced directly from authorized channels to ensure 100% compatibility and performance.
How do I know if it is compatible?
This seal is listed for the engine families in the Compatibility section. This list may not be complete, so check that the part number on your old part is 309-00122-0, or send us your engine model and serial number before ordering.
Where is this oil seal typically used?
This seal is primarily used as the propeller shaft (lower unit) oil seal to prevent gear oil from leaking out and salt water from entering the gearcase, which protects your gears from corrosion.
Note: Distributed by 4boats.co.uk. Please verify your original part number or engine serial number against the references above before purchasing.
For the products under £150 the shipping is £6.99.
Free delivery for most items over £150.
