Mercury 35/40HP 2 Cylinder Outboards Service Manual PN 90-42794--1, Page 196Get this manual

Mercury 35/40HP 2 Cylinder Outboards Service Manual PN 90-42794--1, Page 196

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Test Procedures PUMP "UP" PRESSURE and CONTROL VALVE CHECK 1 Close "Down" port valve and open "Up" port valve2 Turn control knob on pump control valve assembly full out (counterclockwise)3 Run pump in