Mercury – Fuel Tank Threaded Hose Barb Fitting | Fuel System Hardware | Stainless Steel | 8M0058419

Overview

Every boater knows the feeling of settling into a smooth run, your engine responding cleanly with each push of the throttle. That kind of confidence comes from a fuel system built on solid, dependable parts — even the small ones. The Mercury Stainless Steel Fuel Tank Threaded Hose Barb Fitting (8M0058419) is one of those quiet heroes. It’s the simple, sturdy connection that keeps fuel flowing safely and steadily, whether you’re cruising at sunrise or pushing home through afternoon chop. With a part like this installed, you don’t think about it — and that’s exactly the point.

Key Features

• Durable Stainless Steel construction for long-lasting corrosion resistance
• Designed with a 1/4 inch NPT thread and 5/16 inch barb for secure hose attachment
• Compatible with gasoline or diesel fuel systems
• Fits portable fuel tank connections and water-separating fuel filter brackets
• Meets Mercury Marine OEM engineering and performance standards
• Ideal for replacing worn fittings during fuel line or primer bulb updates

Engine & Boat Compatibility

• Suitable for Mercury and Mariner outboards using 5/16 inch fuel lines
• Works with MerCruiser sterndrives requiring a 1/4 inch NPT threaded fitting
• Often used on center consoles, fishing boats, pontoons, runabouts, and small cruisers
• Compatible with portable fuel tanks and many onboard fuel filter brackets

Performance & Practical Benefits

In real-world use, this fitting feels solid, smooth, and trustworthy the moment you thread it in. The Stainless Steel body gives a tight, confident seat that resists corrosion, even after seasons of salt spray and temperature swings. The barb grips the hose with a secure bite, so you’re never left wondering if your fuel line is going to slip or seep under pressure.

What boaters appreciate most is how it eliminates uncertainty. A clean, precision-machined thread means it tightens without wobble or binding. The connection stays dry and steady, giving your engine a consistent fuel supply whether you’re idling through the marina or running wide open. It’s the kind of part that doesn’t call attention to itself — and that’s exactly why seasoned boaters stick with genuine Mercury fittings.

Because it works with both gasoline and diesel, it’s a versatile solution for mixed fleets, portable tanks, or backup systems. And since most fuel-related headaches come from weak connections or aging parts, replacing an old fitting with a new one instantly adds a layer of security and reliability to your setup.

Why Buy OEM

Choosing an OEM Mercury Marine part is a practical, professional decision. You’re getting a fitting designed to match the exact thread depth, taper, and hose barbing specifications required by Mercury fuel systems. Aftermarket fittings often cut corners on materials or machining accuracy, leading to leaks, weak sealing, or premature corrosion. With Mercury, you get precision, long-term durability, and a part that fits right the first time. It’s cost-effective because you’re not replacing it again a season later — and because protecting your engine is always cheaper than repairing it.

FAQ

Q1: Which Mercury engines does this fitting work with?

It fits many Mercury and Mariner outboards and MerCruiser sterndrives that use a 1/4 inch NPT connection with a 5/16 inch fuel line.

Q2: What makes this better than aftermarket fittings?

OEM machining ensures a tight, leak-free seal and Stainless Steel durability that aftermarket options often lack.

Q3: How do I confirm it’s the right replacement?

Check your tank or bracket for a 1/4 inch NPT port and confirm your fuel line has a 5/16 inch inside diameter.

Q4: Is it suitable for saltwater use?

Yes — the Stainless Steel construction handles saltwater conditions very well when properly maintained.

Q5: Can most boaters install it themselves?

Absolutely. Thread it in with sealant if required, tighten securely, and slide the fuel line over the barb.