FUEL PUMP KIT O/B. A reliable fuel system is key to keeping your engine running strong, and the Mercury Diaphragm Kit (23014A1) is built to restore consistent fuel delivery and pressure. Over time, diaphragms wear down from exposure to fuel, heat, and constant movement, leading to sluggish performance or uneven power. This genuine Mercury OEM kit is designed for a precise fit, ensuring your fuel pump functions smoothly without leaks or pressure loss.. Designed for Dependable Fuel Flow:. OEM-Exact Fit - Manufactured to Mercury's strict standards for seamless installation.. Fuel-Resistant Material - Withstands ethanol-blended fuels, extreme temperatures, and wear.. Restores Fuel Efficiency - Keeps pressure stable for smooth acceleration and consistent power.. Ideal for:. Replacing worn-out or failing fuel pump diaphragms.. Preventing inconsistent fuel delivery that can cause hesitation or power loss.. Ensuring optimal performance by maintaining steady fuel pressure.. A weak diaphragm can