Mercury 35/40HP 2 Cylinder Outboards Service Manual PN 90-42794--1, Page 65Get this manual
Cleaning and Inspection 1Clean fuel pump housing, chamber plate and pump base, then dry with compressed air2Look at spring for signs of bad coils or other damage3Check pump body, chamber plate and pump base, for cracks or rough gasket surfaces4Check hoses for looseness or signs of leakage5Look at check valve discs for cracks, tears, or other damage6Repair of fuel pump is limited to the replacement of those bad parts found during inspection
3With retainer installed in pump body, break retainer rod (a) from retainer (b) by bending sideways