Westway Marine Gear Oil SAE 90 GL-4 1L - For Yamaha Mercury Honda Suzuki Outboard
5038-1
- Dispatched in 2-3 days
- 30 Day Return Policy
- In stock, ready to ship
- Backordered, shipping soon
Marine Gear Oil SAE 90 GL-4 (1L)
Professional Grade Lower Unit Lubricant
Keep your marine transmission running smoothly with Westway Marine Gear Oil SAE 90. This high-quality mineral EP (Extreme Pressure) lubricant is specifically engineered for outboard lower units and sterndrives operating in demanding fresh and saltwater environments. Unlike standard automotive oils, this formula is enriched with advanced anti-corrosion and anti-foaming additives to maintain film strength even when moisture is present.
Key Features
- ✔ Yellow Metal Safe: API GL-4 rated
- ✔ Extreme Pressure (EP): Reduces gear wear
- ✔ Water Emulsification: Protects gears if water enters
- ✔ Anti-Foaming: Consistent lube at high RPM
Technical Specs
| Viscosity: | SAE 90 |
| API Rating: | GL-4 |
| Base: | Mineral |
| Volume: | 1 Litre |
Compatibility / Fitment Guide
| Make/System | Model/Application | Notes |
|---|---|---|
| Yamaha Outboards | 2HP - 350HP Models | Lower units requiring SAE 90 |
| Honda Marine | BF2.3 to BF350 | Replaces 08251-999-102PRO |
| Suzuki Marine | DF & DT Series | Suitable for Hypoid gearcases |
| Mercury/Mariner | Outboards below 75HP | Mineral-spec applications |
| Tohatsu | All models | Standard service interval |
OEM Cross Reference
| Honda: 08251-999-102PRO / 08240-999-100 |
| Mercury/Quicksilver: 92-858064K01 / 858059Q01 |
| Suzuki: 99000-22B21-036 / ECSTAR SAE 90 |
| Sierra: 18-9650-2 |
Questions & Answers
Is this oil safe for brass or bronze components?
Yes. This oil is API GL-4 rated, which means it does not contain the aggressive sulfur-phosphorus additives found in some GL-5 oils that can corrode "yellow metal" synchronizers and bushings.
Can I use this in my Volvo Penta or Mercruiser sterndrive?
Yes, provided your manual specifies a mineral SAE 90 or 80W-90 GL-4 lubricant. For high-performance units (Bravo/DP) that require synthetic gear lube, we recommend checking your manufacturer guidelines.
What happens if water gets into my gearbox?
This marine-specific oil contains advanced emulsifiers that allow it to continue lubricating effectively even with minor water contamination, helping prevent catastrophic gear failure until you can perform a service.
Note: Always check your engine's service manual for exact oil capacity and viscosity requirements. Available at 4boats.co.uk.
For the products under £150 the shipping is £6.99.
Free delivery for most items over £150.
