Mercury/Mariner Male Fuel Connector 8 mm (Engine Side, 5/16")

This 8 mm male fuel connector is a typical example of the standard fittings used on older Mercury/Mariner outboards. It mounts on the engine’s fuel inlet and provides a quick connection point for the fuel hose equipped with a female connector. With a diameter of ~8 mm (5/16"), it’s optimized for the fuel hoses commonly found on lower to mid-power engines – for example, two-stroke outboards in the 5–60 HP range.

Despite its compact size, this connector offers a secure, tight connection. The internal locking mechanism latches onto the twin pins of the female connector, preventing accidental disconnection. It’s made from robust fuel-resistant plastic, complemented by metal components for the spring and lock pin. This means the connector won’t crack or corrode through prolonged gasoline exposure.

• Perfect for Small Boats & Engines: For outboard motors of lower horsepower (e.g. 5, 10, 15 HP up to about 40–50 HP), this 8 mm connector matches the original equipment. It provides the needed fuel flow for smooth idling and high speeds without “flooding” or starving the engine.
• Replace an Aging Connector: Over time, small plastic parts can wear. If your original Mercury/Mariner connector is starting to leak or the hose no longer clicks snugly, swapping in this new connector will cure the issue. The result is restored security – no drips and no air sneaking into the fuel.
• Easy Installation & Use: Installation is straightforward – simply remove the old connector from the engine’s fuel pipe and attach the new one, securing it with a clamp. After that, your fuel hose’s coupling will snap on in seconds. This makes readying the boat for launch quick and hassle-free.
• Compatible with Many Models: The diameter and design adhere to Mercury/Mariner standards over the years. This connector can also be used for certain Force models and other brands that utilized a similar 5/16" hose coupling, making it a versatile solution for many outboard setups.