Mercury – Fuel Line (100 ft.) | Fuel System Hose | Gray Polymer | 8M0038500

Overview

If you’ve spent enough time on the water, you know that a dependable fuel line isn’t just another piece of rigging — it’s the quiet lifeline that keeps every trip running smooth. A good line doesn’t kink when the sun is beating down, it doesn’t stiffen when the temperatures drop, and it certainly doesn’t surprise you with vapor lock halfway across the channel. That’s why boaters stick with Mercury’s fuel system parts. They’re predictable, steady, and built with the kind of trust you only get from years of real-world use. This 100-foot fuel line gives you the freedom to re-rig your whole setup with confidence.

Key Features

• Designed for any Mercury, Mariner, Force, or MerCruiser engine using 5/16-inch (8mm) inside diameter fuel line
• Low-permeation construction that helps reduce fuel vapor loss
• Flexible gray polymer material engineered for long service life
• Bulk roll of 100 feet, ideal for full re-rigs or multi-boat setups
• Durable structure resists sunlight, heat, and routine deck abrasion
• Meets strict Mercury Marine part specifications for performance and reliability

Engine & Boat Compatibility

• Works with all Mercury and Mariner outboards that use a 5/16-inch fuel system
• Compatible with Force and MerCruiser engines requiring the same diameter
• Popular for center consoles, skiffs, bay boats, small pontoons, aluminum fishing boats, and runabouts
• Excellent for both single-engine and twin-engine fuel rigging

Performance & Practical Benefits

There’s something refreshing about installing a new fuel line that bends easily and seats firmly without fighting you. This Mercury Marine part delivers that feeling right away. It has a smooth, cooperative flexibility that makes routing through rigging tubes or tight transom spaces far less frustrating. Once in place, it holds its shape and keeps a reliable, steady flow of fuel even during sharp turns, choppy rides, or long runs at higher speeds.

The gray color isn’t just for looks — it helps reduce vapor lock by absorbing less heat, and it also lets you spot any signs of wear more easily during routine inspections. On warm days, while other lines might harden or swell, this material stays consistent. You’ll notice the difference in how confidently your engine starts and how predictable fuel delivery feels at every throttle position.

Since it’s low-permeation and built to Mercury’s exact standards, you get a hose that lasts longer, smells less like fuel, and stays compliant with modern regulations. And when you’re working with a full 100-foot spool, you’ve got plenty to handle multiple projects or to keep some extra on hand for future replacements.

Why Buy OEM

I’ve been around enough marine fuel systems to know that aftermarket hose can be hit or miss. Some look fine on day one but stiffen quickly, collapse under suction, or start sweating fuel in a season or two. That’s not a gamble worth taking.

With a genuine Mercury Marine part:

• You know the material meets modern safety and environmental standards
• Fitment is correct for Mercury primers, connectors, and clamps
• Longevity is noticeably better than generic hose
• Fuel delivery stays consistent, which protects your engine long-term
• You save money by avoiding premature replacements

If you want a line that behaves predictably season after season, this is the one to trust.

FAQ

Q1: Which engines does the 8M0038500 fuel line fit?

Any Mercury, Mariner, Force, or MerCruiser engine that uses 5/16-inch inside diameter fuel line.

Q2: What makes this different from aftermarket hose?

It maintains flexibility longer, resists heat more effectively, and meets Mercury Marine’s durability requirements.

Q3: How can I confirm it’s the right size?

If your current fuel system uses a 5/16-inch line, this is the correct replacement.

Q4: Is it suitable for saltwater use?

Absolutely — the polymer construction withstands sunlight, salt, and standard marine wear.

Q5: Is installation approachable for most boaters?

Yes. Most owners install it using simple cutters and common clamps.