Mercury 35/40HP 2 Cylinder Outboards Service Manual PN 90-42794--1, Page 385Get this manual

Mercury 35/40HP 2 Cylinder Outboards Service Manual PN 90-42794--1, Page 385

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5 Install vent tube (a) thru hole in oil pump cover plate (b)
Oil Pump Outlet Check Valve Removal
1 Remove main body assemblySee page 182 Remove internal oil filterSee page 21 3 Remove two