Tohatsu Gear Case O-Ring 345-65015-0 Mercury 25-16131 Fits 5hp 8hp 9.8hp 9.9hp
345-65015-0
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Tohatsu O-Ring 345-65015-0
Premium Quality Lower Unit Seal
Maintain the integrity of your outboard's lower unit with this high-performance gear case O-ring. Specifically engineered for small-displacement Tohatsu and Nissan outboard engines, this part provides a critical seal for the propeller shaft housing, preventing water from contaminating your gear lubricant and protecting internal gears from corrosion and wear.
Key Features
- ✔ Direct fit for 5HP - 9.8HP Gear Cases
- ✔ High-grade Silicone (SI) construction
- ✔ Precision thickness for optimal compression
- ✔ Resistant to marine fuels and oils
Technical Specs
| Thickness: | 3.2 mm |
| Diameter: | 47 mm |
| Material: | Silicone (SI) |
| Application: | Propeller Shaft Housing |
Compatibility / Fitment Guide
| Make/System | Model/Application | Notes |
|---|---|---|
| Tohatsu 2-Stroke | M5B, M5BS, M6B, M8B, M9.8B | 5hp to 9.8hp Engines |
| Tohatsu 4-Stroke | MFS8, MFS9.8 | 8hp / 9.8hp A/B Models |
| Nissan Marine | NS5, NS8, NS9.8 | All equivalent models |
| Mercury / Mariner | 6hp, 8hp, 9.9hp (4-Stroke) | Tohatsu-origin models |
OEM Cross Reference
| Tohatsu / Nissan: | 345-65015-0, 345650150M, 345-65015 |
| Mercury / Quicksilver: | 25-16131, 16131 |
| Other Cross-Refs: | 5040061, F8-04040002 |
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.
How do I know if it is compatible?
We recommend checking the SKU/MPN and Cross Reference list provided above. If your original part number matches any of these, it is a guaranteed fit.
Where is this O-ring located on the engine?
This O-ring is typically located in the gear case assembly, specifically sealing the propeller shaft housing (bearing carrier) to prevent water ingress into the lower unit gear oil.
Note: Please verify your original part number against the references above before purchasing. Part 345-65015-0 is common on 5hp to 9.8hp portable models. 4boats.co.uk
For the products under £150 the shipping is £6.99.
Free delivery for most items over £150.
