Mercury – Automatic Transmission Fluid | Marine DEXRON III Formula | 1 Quart | 8M0173229

Overview

When you spend your days on the water—towing wake riders, cruising across calm mornings, or pushing through wind-chopped afternoons—you start to appreciate the parts that quietly keep everything running smoothly. Mercury Automatic Transmission Fluid 8M0173229 is one of those unsung essentials. It’s engineered for the constant shifting, heat, and pressure that marine transmissions endure, and it gives you the steady, predictable response you rely on when throttle and gear changes matter most.

There’s something reassuring about knowing your transmission isn’t fighting against heat or slipping when you need crisp engagement. This fluid offers that peace of mind—not by chance, but by design.

Key Features

• Meets DEXRON III requirements for broad compatibility
• Resists heat-related breakdown for consistent lubrication
• Low-viscosity formulation enhances fuel efficiency and smooth shifting
• Designed specifically for the harsh, high-load marine environment
• Provides durable protection against wear and internal scoring
• Produced to Mercury Marine OEM specifications for guaranteed fit and performance

Engine & Boat Compatibility

Ideal for marine power systems requiring DEXRON III automatic transmission fluid, including:

• Mercury and MerCruiser inboard and sterndrive transmissions
• Outboards with integrated transmission systems requiring ATF
• Tow Sport boats, especially those operating at variable throttle and load
• Sport boats, runabouts, pontoons, and utility vessels with hydraulic shift systems

Performance & Practical Benefits

On the water, heat is the enemy of any transmission. This Mercury ATF is built to stand up to that abuse. It keeps shifting crisp and predictable while resisting thinning or breakdown during long days of towing or running at higher RPMs.

The fluid’s low-viscosity formula helps your system move freely and efficiently. Gear changes feel tight, smooth, and clean, without hesitation or slipping. At the same time, the blend protects gears, seals, and internal components from wear—helping your transmission stay healthy season after season.

Because it’s formulated specifically for marine use, it shrugs off moisture, thermal stress, and the constant load changes that happen in real boating, not just test bench conditions. You’ll notice steadier performance and fewer surprises, even after long hours at the helm.

Why Buy OEM

With something as mission-critical as transmission fluid, using genuine Mercury OEM makes all the difference:

• Guaranteed compatibility with Mercury shift systems
• Superior heat stability compared to generic ATF blends
• Longer service life and fewer performance drop-offs
• Designed to protect the exact materials and components Mercury builds into its transmissions
• No guesswork—just reliable, tested performance

Think of it like putting the right fuel in your boat: it’s not about brand loyalty, it’s about knowing your equipment is getting what it was designed for.

FAQ Section

Q1: Which Mercury systems does this fluid fit?

Any outboard, inboard, or Tow Sport transmission requiring DEXRON III fluid.

Q2: What makes this different from aftermarket ATF?

It’s engineered specifically for marine heat loads and shifting demands—not automotive conditions.

Q3: How do I know if it’s the right fluid for my engine?

Your owner’s manual will specify DEXRON III if this is the proper match.

Q4: Is it suitable for both saltwater and freshwater boats?

Yes—its marine-grade formulation resists corrosion and moisture intrusion in any environment.

Q5: Is installation simple?

Most owners can replace or top off ATF using basic tools and their manual’s instructions.