Mercury Mariner 30/40 4-Stroke Outboard Service Manual 1998, Page 72Get this manual

Mercury Mariner 30/40 4-Stroke Outboard Service Manual 1998, Page 72

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IGNITION

Weak Spark Condition

Timing Fluctuates

Loss Of all PressureOver Heating: timing retards and fluctuates, rpm NOTE: It is considered normal will drop belo

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