Mercury 35/40HP 2 Cylinder Outboards Service Manual PN 90-42794--1, Page 387Get this manual
Oil Pump Inlet Check Valve Removal 1Remove main body assemblySee page 182Remove internal oil filterSee page 213Remove two screws (a) and tube (b) from oil pump
5Remove check valve assembly (a) from oil pump (b)
IMPORTANT: No further disassembly can be performed on AutoBlend
4Remove gasket (a)