Fuel Pump Diaphragm Kit – Fits Mercury Mariner 70-115 HP (Replaces 42909A1, 42909A2, 42909A3, 42909A4) OMC In severe cases

In severe cases

Install the new gasket and replace the pump cover plate

This drain bladder is designed to expand to fit pipes with an inner diameter of 1

Features recessed check valves that automatically close upon disconnection to prevent accidental spray or leaks

Fuel Pump Diaphragm Kit – Fits Mercury Mariner 70-115 HP (Replaces 42909A1, 42909A2, 42909A3, 42909A4) OMC In severe casesProduct Details This Fuel Pump Diaphragm Kit is designed for Mercury Mariner 70115 HP outboard engines, specifically fitting 3 cylinder (70, 75, 80, 90 HP) and 4 cylinder (100, 115 HP) models manufactured between 19831993. It serves as a direct cross reference for Mercury part numbers 42909A1, 42909A2, 42909A3, and 42909A4, and interchanges with Sierra 18 7818 1, Mallory 9 37754, and GLM 40280. Direct replacement fit for straightforward installation.