This OEM Yamaha Yamalube 20W-40 4-Stroke Marine Engine Oil (Quart) is the factory-recommended lubricant for Yamaha 4-Stroke outboard engines.
Specially formulated to provide superior anti-corrosion protection, thermal stability, and optimal film strength under high-load marine conditions.
Yamalube 20W-40 meets NMMA FC-W® certification standards and is engineered to deliver OEM-level protection for all 4-stroke outboards, from small displacement to V6 and V8 models.
Replaces OEM part numbers LUB-20W40-FC-12 and ACC-Y4M20-40-12 and cross-references with multiple Sierra equivalents.
Product Features
- Manufacturer: Yamaha Marine (OEM)
- Application: Yamaha 4-Stroke Outboard Engines
- Type: Genuine Yamalube marine engine oil
- Viscosity Grade: SAE 20W-40
- Size: 1 Quart (946 mL)
- Replaces OEM #: LUB-20W40-FC-12, ACC-Y4M20-40-12
- Cross Reference #: 18-9450, 18-9450-2, 18-94502
- Manufacturer Item #: FC2040-QT
- Certification: NMMA FC-W® Certified for 4-Stroke marine engines
- Condition: 100% brand-new genuine Yamaha OEM oil
- Warranty: Protected by Yamaha Marine’s limited parts warranty
Additional Information
Note: Recommended for Yamaha 4-Stroke outboards in warm to high-temperature conditions.
Provides exceptional protection against oxidation, saltwater corrosion, and shear breakdown for long engine life.
For cold or mixed-climate operation, Yamalube 10W-30 may be preferred.
Always confirm your outboard’s manual for correct oil grade recommendations.
Shipping Information
SHIPPING: Additional shipping fees to Alaska, Hawaii, U.S. Territories, or international destinations will be calculated after checkout.
You will receive an email and a PayPal money request for the additional shipping charges at the email address provided.
(Some items are excluded from international shipping.)
Customer Support
For questions or to confirm compatibility, please email customerservice@marinepartswarehouse.com .
Include your engine model or oil specification to ensure proper selection before ordering.
