1987-1993 Mercury Mariner Outboards 70/75/80/90/100/115HP 3 and 4-cylinder Factory Service Manual, Page 60Get this manual
TimingSynchronizing Adjusting (3 Cylinder Models) Specifications
70, 75 and 80 Models Serial Number and Above U.SBelgium Canada B239242 9502135 A730007 47505250 650700 26_ B.T.D.C(28_ B.T.D.C 0_4_ B.T.D.CNGK BUHW-2 1-3-2
Mariner 75 MarathonMerc 75XD Full Throttle RPM Range Idle RPM (in "FORWARD" Gear) Maximum Timing 5000 RPMCranking Speed) Idle Timing Spark Plug Firing Order 47505250 650700 16_ B.T.D.C(18_ B.T.D.C 0_4_ B.T.D.CNGK BUHW-2 1-3-2
Special Tools
Part No91-58222A1 91-59339 91-99379 91-63998A1 Description Dial Indicator Gauge Kit Service Tachometer Timing Light Spark Gap Tool
Full Throttle RPM Range Idle RPM (in "FORWARD" Gear) Maximum Timing 5000 RPMCranking Speed) Idle Timing Spark Plug Firing Order 70, 75 and 80 Models Serial Number and Below U.SBelgium Canada B239241 9502134 A730006