Mercury – Fuel Line Assembly | Fuel System | Gray Low-Permeation Hose | 8M0072133

Overview

There’s a certain peace that comes from knowing your fuel system is solid — the kind of confidence you feel when the primer bulb firms up on the first squeeze and the engine wakes right up. This Mercury Fuel Line Assembly delivers that familiar reliability. Whether you’re easing out of the marina at sunrise or heading back after a long afternoon chasing fish, it keeps fuel moving with a calm steadiness that makes every outing feel a little easier. It’s one of those small but essential pieces that lets you focus on the water instead of the equipment.

Key Features

• Five-sixteenth-inch inside diameter fuel line for steady, consistent fuel flow
• Low-permeation hose protects fuel quality and limits fumes
• Mercury-engineered primer bulb for quick, reliable priming
• Gray exterior helps reduce heat build-up and prevents vapor lock
• Durable and flexible construction designed for long-term marine use
• Compatible with a variety of tank and engine fittings depending on your setup
• Works with both portable tanks and permanent fuel systems

Engine & Boat Compatibility

• Fits Mercury and Mariner outboards using universal five-sixteenth-inch fuel lines
• Suitable for small and mid-range outboards across many model years
• Ideal for aluminum fishing rigs, pontoons, runabouts, tenders, and skiffs
• Adapts easily to different fuel tank styles with the correct connectors

Performance & Practical Benefits

The first thing you’ll notice is how confidently the primer bulb responds — a smooth squeeze, a firm feel, and quick pressure that tells you the engine is ready. Once installed, the hose routes neatly through rigging tunnels, storage areas, and tight corners without kinking or flattening. Its flexibility makes installation simpler and helps maintain steady fuel flow even when the boat is loaded or bouncing through chop.

On hot days, the gray coating shows its value by keeping the hose cooler than darker lines, reducing the chance of vapor lock when the engine is working hard. The low-permeation construction helps keep fuel fresh and limits gasoline odor, especially if your boat stays under a cover or in a garage. Over the long haul, the hose resists cracking, stiffening, and sun damage, while the primer bulb stays responsive — giving you the same clean performance season after season.

Why Buy OEM

Fuel delivery isn’t an area where shortcuts pay off. Genuine Mercury Marine parts are built to the same standards the engines themselves follow — precise flow characteristics, strong primer bulbs, and materials meant for real-world marine conditions. Aftermarket lines may look the part, but they often fall short in durability, pumping strength, or long-term flexibility. Choosing OEM means fewer surprises, fewer replacements, and the assurance that your line will perform exactly the way Mercury intended. It’s the kind of practical choice experienced boaters rely on because it leads to more time on the water and fewer headaches.

FAQ

Q1: Which engines does the 8M0072133 Fuel Line Assembly fit?

It fits Mercury and Mariner outboards that use a universal five-sixteenth-inch fuel line and can be paired with the appropriate tank and engine connectors.

Q2: How is this different from aftermarket versions?

The hose materials, primer bulb design, and engineering precision meet Mercury’s standards, offering better priming, greater durability, and more consistent fuel flow.

Q3: How do I know if this is the correct replacement?

Verify your system uses a five-sixteenth-inch line and identify your connector types. With the proper fittings, this assembly is typically a direct replacement.

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

Yes. It’s engineered for long-term performance in either environment.

Q5: Is installation straightforward for most boat owners?

Very. Attach the proper connectors, route the hose cleanly, secure it, and you’re ready for the water.