Genuine Tohatsu Drive Shaft (Upper S) SKU 309-64312-1 | 4Boats
309-64312-1
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Drive Shaft (Upper S) 309-64312-1
Premium Replacement for Tohatsu & Nissan Outboards
This precision-machined Upper Drive Shaft (Short Shaft) is designed for the lower unit assembly of small horsepower Tohatsu and Nissan outboard motors. Engineered from marine-grade stainless steel, it provides the durability and corrosion resistance required for harsh saltwater and freshwater environments.
Key Features
- ✔ Direct fit for 15" (Short Shaft) transoms
- ✔ High-strength marine-grade steel
- ✔ Splined for precision engine mating
- ✔ Resistant to wear and torsion stress
Technical Specs
| Shaft Type: | Upper Drive Shaft |
| Configuration: | S (Short Shaft) |
| Compatibility: | 2.5hp / 3.5hp |
| Material: | Stainless Steel |
Compatibility / Fitment Guide
| Make/System | Model/Application | Notes |
|---|---|---|
| Tohatsu Outboard | M2.5A2, M3.5A2, M3.5B2 | Short Shaft (S) Models |
| Nissan Outboard | NS2.5A2, NS3.5A2, NS3.5B2 | Short Shaft (S) Models |
| Mercury Outboard | 2.5hp / 3.3hp (2-Stroke) | Tohatsu-based models |
OEM Cross Reference
| Tohatsu / Nissan SKU | 309-64312-1, 309-64312-0, 309643121M, 309643120 |
| Mercury SKU | 803610 |
Questions & Answers
Is this a genuine original part?
This is a premium quality aftermarket replacement part, manufactured to meet or exceed original equipment (OE) standards for fitment and performance on Tohatsu and Nissan engines.
How do I know if it is compatible?
We recommend checking the SKU/MPN and Cross Reference list provided above. This shaft is specifically for "Short Shaft" (15-inch transom) engines. If your engine is a "Long Shaft" (L), this part will be too short.
Does this include the lower drive shaft?
No, this listing is for the Upper Drive Shaft only. In these specific 2.5hp/3.5hp models, the drive shaft is typically a multi-piece assembly involving an upper and lower section.
Note: Please verify your original part number or engine serial number against the references above before purchasing. Available at 4boats.co.uk.
For the products under £150 the shipping is £6.99.
Free delivery for most items over £150.
