Mercury 35/40HP 2 Cylinder Outboards Service Manual PN 90-42794--1, Page 60Get this manual
Fuel Pump Disassembly and Reassembly FUEL PUMP INSTALLED
Fuel Pump with One Red Colored Check Valve, One White Colored Check Valve and Filler Block
Fuel Pump Housing Gaskets Check Valve (Red Color) Check Valve (White Color)
eFiller BlockScrew (2)SpringCap
FUEL PUMP COMPONENTS Fuel Pump with Two Black Colored Check Valves
Cleaning and Inspection
Clean fuel pump housing, check valves, pulse chamber and pump base in solvent and dry all but check valves with compressed airInspect each check valve and replace if spring tension is weak or springs are brokenInspect fuel pump housing, pulse chamber and base for cracks or rough gasket surface and replace if any are found Inspect fitting on fuel pump housing for looseness or any signs of fuel or air leaks Replace or tighten fitting if leak is found