FLUID-PWRSTR (858077K01)
This is a fully synthetic oil for use in power steering systems on Mercury, Mariner and Mercruiser engines. There is no need to drain the system before using this fluid as it will readily mix with the fluid in the system.
$34.15
Price Match
FLUID-PWRSTR (858077K01) is a premium marine power steering fluid engineered to meet the high-performance demands of Mercury’s advanced power steering systems. Designed to deliver smooth, quiet, and precise steering control, this specialized fluid is essential for maintaining the integrity and responsiveness of your vessel’s hydraulic steering system.
Mercury power steering systems operate under extreme marine conditions — from prolonged idle to wide-open throttle — and require a fluid that can handle variable temperatures, high pressure, and constant exposure to moisture. FLUID-PWRSTR (858077K01) is formulated specifically to excel in these environments, offering exceptional thermal stability and oxidation resistance to prevent breakdown over time.
This fluid maintains a consistent viscosity across a wide temperature range, ensuring smooth steering performance whether you’re navigating cold morning waters or cruising on a hot summer day. It is resistant to foaming, which helps eliminate erratic steering response caused by air bubbles or cavitation in the system. With excellent lubricating properties, it reduces wear on seals, hoses, and internal components, helping to extend the life of your power steering system.
FLUID-PWRSTR (858077K01) also provides superior corrosion and moisture protection — two critical factors in marine environments. It helps prevent internal rusting, pitting, and corrosion-related failures, ensuring your power steering system remains in peak condition season after season.
Recommended for use in all Mercury and MerCruiser power steering systems, this fluid meets Mercury Marine’s exacting standards for reliability and performance. Whether you’re maintaining a high-horsepower outboard setup or a sterndrive-equipped boat, FLUID-PWRSTR (858077K01) delivers the dependable steering feel and performance serious boaters expect.
Supplied in a convenient bottle for easy storage and handling, it’s perfect for both professional marine technicians and DIY maintenance. Routine use during fluid changes or top-ups ensures long-lasting steering responsiveness and protects against costly repairs.
Choose FLUID-PWRSTR (858077K01) to keep your steering system running smoothly, safely, and reliably in all marine conditions.
| Weight | 0.91 kg |
|---|---|
| Dimensions | 4.19 × 3.71 × 3.23 cm |
Brand
Mercury Parts & Accessories
