Mercury 35/40HP 2 Cylinder Outboards Service Manual PN 90-42794--1, Page 359Get this manual
Oil Pump Inlet Check Valve Removal 1Remove main body assemblySee page 152Remove internal oil filterSee page 173Remove 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)