Mercury Mariner 30/40 4-Stroke Outboard Service Manual 1998, Page 509Get this manual
TIL.LER HANDLE
5Rotate throttle grip to idle position6Insert the anchor on the shorter th rottle cable into the anchor slot on the throttle lever7Secure cable in position by tightening jam nuts onto bracket (finger tighten only)8Insert anchor on remaining cable into the anchor slot on the throttle lever9Secure cable in position by tightening jam nuts onto bracket (finger tighten only)