Mercury – Steering Cylinder Seal Kit | Verado Steering System | Marine-Grade Seals | 8M0045604

Overview

Anyone who’s spent enough time behind the helm knows that steering isn’t just a mechanical function—it’s a feeling. When your steering is smooth, tight, and predictable, the whole boat feels more connected to you. But when something in the system starts to wear, you notice it fast. That’s why boaters trust genuine Mercury replacement parts like the 8M0045604 Steering Cylinder Seal Kit. It’s the kind of part you install once and immediately feel the difference, whether you’re threading through a narrow channel or trimming up onto plane. There’s a certain comfort in knowing the steering will respond the moment you touch the wheel.

Key Features

• Complete steering cylinder seal kit for restoring proper hydraulic performance
• Marine-grade sealing components built for long-term durability
• Engineered to Mercury Marine’s precise specifications
• Designed to withstand hydraulic pressure, heat, and constant saltwater exposure
• Installs using common shop tools

Engine & Boat Compatibility

This kit fits a wide range of Mercury and Mariner engines, including:

• Verado 200, 225, 250, 275 FourStroke (0T980000–1B517433)
• Verado 200, 225, 250, 275, 300 Six-Cylinder FourStroke (1B517434–2B144122)
• Pro FourStroke Verado 200, 250, 300 (1B830170–2B577715)
• 300R 4.6L V8 FourStroke AMS (1E81459 & up)
• SeaPro 4.6L V8 300 (2B529482 & up)
• Verado 350–400 / PRO / Racing models (2B141124–3B342962)
• Verado V10 350/400/425 (3B266064 & up)

Commonly used on:

• Offshore center consoles
• Performance fishing boats
• Heavy cabin cruisers
• High-horsepower pontoons
• Coastal workboats

Performance & Practical Benefits

You can tell when your steering system is due for new seals—the wheel feels a little loose, maybe you notice hydraulic misting, or the response just isn’t as precise as it used to be. Replacing the seals with this kit restores that tight, confident steering feel that Mercury Verado engines are known for.

These components are engineered to handle the real-world grind of marine use. Heat, pressure cycles, vibration, hours of trimming and turning—all of it. The seals sit securely, creating a smooth, steady hydraulic action that translates directly into more responsive handling. You’ll feel the difference the first time you pull out of the marina: the wheel turns cleanly, holds its line, and lets you run confidently even in rough weather.

The installation is straightforward for anyone familiar with hydraulic steering systems. And once installed, the kit helps extend the life of your cylinder and steering pump by keeping fluid where it belongs and preventing premature wear.

Why Buy OEM

If there’s one place not to cut corners, it’s your steering system. Genuine Mercury seals are designed specifically for the pressures and tolerances of Verado steering, and they simply outlast aftermarket alternatives. They fit right the first time, maintain factory-level performance, and protect your much more expensive steering cylinder from unnecessary stress.

OEM parts also save you from guesswork—no mystery materials, no questionable tolerances. Just a reliable Mercury Marine part that does its job season after season.

FAQ

Q1: Which engines does this seal kit fit?

It fits a broad range of Mercury Verado 200–425 horsepower models, including Six-Cylinder, V8, and V10 platforms.

Q2: What makes this better than aftermarket seals?

Mercury engineers these seals to exact factory specs, using marine-grade materials that handle real-world hydraulic stress better and longer.

Q3: How do I confirm it’s the right kit for my engine?

Match your engine’s serial number with the ranges listed above or check your service manual.

Q4: Is it suitable for both saltwater and freshwater?

Absolutely—these seals are designed for the harshest saltwater environments.

Q5: Is installation simple?

Most mechanically comfortable boat owners can install it using standard tools, though many prefer a technician due to hydraulic components.