Mercury Mariner 30/40 4-Stroke Outboard Service Manual 1998, Page 119Get this manual

Mercury Mariner 30/40 4-Stroke Outboard Service Manual 1998, Page 119

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TIMING, SYNCHRONIZING,ADJ USTING
a -Idl RPM Adjustme nt Screw 3 Rev engine or times and allow to idle for 15 secondsaIf the engine holds stable idl condition, then no other adju stments are nece

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