MERCURY FUEL PUMP DIAPHRAGM KIT (SQUARE PUMP)

Restore reliable fuel delivery to your outboard with the MERCURY FUEL PUMP DIAPHRAGM KIT (SQUARE PUMP)—a high-quality replacement kit designed to rebuild square-style fuel pumps found on many Mercury 2-stroke engines. Over time, fuel pump diaphragms can harden, crack, or fail due to constant exposure to fuel, ethanol, and engine heat. This kit provides everything you need to bring your fuel pump back to life and ensure consistent fuel flow to your carburetors.

The MERCURY FUEL PUMP DIAPHRAGM KIT (SQUARE PUMP) includes premium-grade rubber components that resist swelling, shrinking, and ethanol breakdown. It’s compatible with a wide range of Mercury outboard motors using the square-type fuel pump—commonly found on 6hp to 60hp models. Whether you’re experiencing hard starts, fuel starvation, or surging performance, this kit is often the first and most affordable step in restoring power and reliability.

Easy to install for DIYers or professional marine mechanics, this diaphragm kit fits perfectly into your existing fuel pump housing. It helps ensure that your engine receives the proper amount of fuel at all times, improving throttle response and engine longevity. Regular replacement of diaphragm components is an important part of outboard maintenance, especially if your motor is used frequently or sits for extended periods between uses.

Save money and avoid unnecessary fuel pump replacements by using this rebuild kit to keep your system operating like new. Whether you’re servicing your fishing boat, tender, or small runabout, this kit offers a cost-effective solution to one of the most common fuel-related issues in outboard engines.

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