Replacement diaphragm kit 857005A1 is for select 30-65hp Mercury and Mariner 2-stroke outboards. See your owner's manual or service manual for specific application and installation instructions.
12-piece kit to rebuild/repair carburetor diaphragm on select 30-65hp, Mercury and Mariner 2-stroke outboards
Kit includes fuel pump diaphragms, gaskets, check valves, spring, cap and screws
Produced to meet Mercury Marine original equipment manufacturer specifications to maximize the performance of your Mercury and Mariner outboard or MerCruiser sterndrive