Sierra 18-80420 Honda Outboard Fuel Connector 1/4"

When the fuel connector on a Honda outboard starts to weep, crack, or lose its grip, the whole fuel system suffers. Air sneaks in, the motor gets hard to start, and you end up pumping the primer bulb over and over at the ramp. The Sierra Marine 18-80420 is the fix. It's a straight 1/4-inch hose barb fuel connector, sold as a single piece, built to drop right into the spot where your factory connector lived.

This is the fitting that ties your fuel line into the engine's fuel system. The barbed end accepts standard 1/4-inch marine fuel line, and the straight body keeps the line running in a clean, natural path instead of forcing a bend at the connection. It's finished in black, sold as a single unit, with no guesswork about what you're getting. If you've traced a fuel problem back to a tired connector, this is the part that gets you back on the water.

Sierra has been supplying marine parts for decades, and they build to a simple standard: meet or exceed the original equipment part they replace. This connector cross-references Honda OEM part 17650-921-003ZB, so if that's the number stamped on your old piece or listed in your parts diagram, you're in the right place. Sierra supplies OEM engine builders and boat builders every day, so the fit and finish match what you'd expect off the factory line.

Why does a connector like this matter so much? Because a marine fuel system lives a hard life. Heat cycles, vibration, ethanol-blended pump gas, salt spray, and years of sun all work against the materials in a fuel system. The connector is one of the most-handled parts in the whole setup, clicked on and off every time you move the tank or swap a hose. Over time the seal gives up. When it does, you don't always get an obvious puddle. Sometimes it's just a slow air draw that makes the engine stumble at idle or refuse to hold prime. Replacing the connector is cheap insurance against a bad day on the water.

Installation is straightforward for anyone comfortable with basic rigging. Take a second to wipe the barb and the inside of the hose end clean first, so no grit gets trapped in the line. Slide your 1/4-inch fuel line over the barb, and push it on far enough that the barb is fully seated in the hose. Secure it with a proper fuel-rated clamp so it can't back off under vibration. Then connect the fitting to your Honda's fuel system and route the line so it isn't kinked or rubbing on anything sharp. Give the primer bulb a few squeezes until it's firm, and check the connection for weeping before you start the motor. That's it. No special tools, no fuss.

A few things are worth checking before you order. First, confirm your fuel line is actually 1/4-inch, since outboards run a few different line sizes and the barb needs to match the hose. Second, this connector is sold single, so if you're rebuilding a fuel line that needs a fitting on each end, grab two. And if you're not certain your Honda uses this exact connector, cross-reference the OEM number 17650-921-003ZB against your parts list before you buy. A minute of checking saves a return.

For the money, keeping a spare connector in the boat's parts box is just smart. Fuel fittings are the kind of thing that fail at the worst possible time, and having the right one on hand beats waiting on a tow. Whether you're doing a planned fuel-line refresh or chasing down a stubborn hard-start, the Sierra 18-80420 puts a fresh, factory-quality connection between your tank and your Honda outboard.