Mercury – Power Trim and Steering Fluid | Universal Marine Hydraulic Formula | 858075K01

Overview

Every boater knows the feeling — that effortless glide when the wheel turns smooth, the trim responds instantly, and everything just feels right. That’s not luck or coincidence; that’s good maintenance, and Mercury Power Trim and Steering Fluid is a big part of it. Whether you’re cutting across open water or easing into a quiet dock, you’ll appreciate the precision and calm control it brings to every movement. It’s not flashy, but it’s the kind of part you trust without thinking twice — because it works, every single time.

Key Features

• Universal marine hydraulic fluid formulated for power trim and steering systems
• Designed for outboard and sterndrive applications (excluding electric or manual helm systems)
• Protects seals, hoses, and components from corrosion, oxidation, and wear
• Resists foaming for smooth, consistent hydraulic response
• Recommended for applications requiring Type F transmission fluid
• Available in a 1-quart bottle for long-term or multi-system maintenance

Engine & Boat Compatibility

• Compatible with Mercury and MerCruiser power trim and hydraulic steering systems
• Designed for outboards and sterndrives across a wide range of horsepower ratings
• Ideal for bass boats, pontoons, sport cruisers, and performance setups
• Suitable for freshwater and saltwater use

Performance & Practical Benefits

When your boat responds the way you expect it to, there’s a kind of peace in that. Mercury Power Trim and Steering Fluid helps maintain that feeling by ensuring your hydraulic systems work cleanly and consistently. It flows with precision — not too thin to leak past seals, not too thick to slow your response. Every turn feels steady, every trim adjustment feels smooth, and you can sense that the system’s protected inside and out.

The formula’s anti-foam properties mean you’ll avoid those soft, uneven spots in your steering, even during long runs. Its corrosion inhibitors defend against salt, moisture, and oxidation, extending the life of seals, hoses, and fittings. You’ll notice how predictable your controls feel — firm yet fluid — whether you’re throttling up or fine-tuning your trim for efficiency.

It’s one of those simple maintenance choices that makes a big difference over time. Keep your systems clean, and they’ll keep you safe, responsive, and in control — just the way boating should feel.

Why Buy OEM

You can find plenty of fluids that say “marine-grade,” but few are designed by the same people who build your engine. This genuine Mercury Marine part is tested in the same demanding conditions your boat faces — from humid saltwater environments to full-day runs in the sun.

Choosing OEM means you’re not guessing. You’re using the same formula Mercury engineers trust for factory performance. It’s compatible, consistent, and proven — which saves you time, prevents leaks, and protects your investment in the long run.

If you’ve ever turned the wheel and felt that confident, precise resistance, you know the difference quality makes. This is that difference in a bottle.

FAQ Section

Q1: Which Mercury systems use Power Trim and Steering Fluid 858075K01?

It’s designed for Mercury and MerCruiser hydraulic trim and steering systems, excluding electric or manual helm types.

Q2: Can it replace Type F transmission fluid?

Yes, it’s suitable for marine applications where Type F transmission fluid is recommended.

Q3: What makes this better than generic hydraulic oils?

It’s specifically engineered for marine systems — resisting foaming, oxidation, and seal damage under heat and moisture.

Q4: Can it be used in both saltwater and freshwater?

Absolutely. It’s built for marine environments and resists corrosion in both conditions.

Q5: Is it compatible with other hydraulic fluids?

Yes, it mixes safely with most other marine hydraulic fluids.