1998 Mercury 9.9/15HP 4-stroke outboards factory service manual, Page 61Get this manual

1998 Mercury 9.9/15HP 4-stroke outboards factory service manual, Page 61

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IGNITION

Engine Surges Over 5850 RPM While Under Load

NOTE: The engine (ECM) will retard timing and reduce rpm above 5850 rpmLoss Of Oil Pressure:timing retards and fluctuate