This OEM Mercury Hydraulic Helm Steering Fluid (1 Quart) is the genuine factory-recommended fluid for all Mercury and SeaStar hydraulic steering systems.
Formulated to deliver smooth, precise steering performance, this premium blend provides superior anti-foam, anti-wear, and corrosion protection for marine steering components.
Designed for extreme marine environments, it maintains viscosity stability over a wide temperature range, ensuring consistent performance and responsive helm control.
Replaces OEM part number 858078Q01, the official replacement for 826485A1 and 862014Q1.
Product Features
- Manufacturer: Mercury Marine (OEM)
- Application: Hydraulic helm steering systems
- Type: Hydraulic Steering Fluid
- Size: 1 Quart (32 oz)
- OEM Part #: 858078Q01
- Cross Reference #: 826485A1, 862014Q1
- Performance: Provides smooth hydraulic response and protects seals, hoses, and internal helm components
- Compatibility: For Mercury and SeaStar hydraulic systems
- Condition: 100% brand-new genuine Mercury OEM product
- Warranty: Backed by Mercury Marine’s limited parts warranty
Additional Information
Note: Use only genuine Mercury steering fluid for maximum performance and system longevity.
Compatible with all Mercury hydraulic helm systems and SeaStar/BayStar steering assemblies.
Maintains viscosity under both cold start and high-heat operation.
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 .
Please include your engine or steering system model number to verify correct fluid selection before ordering.
