Mercury 150 Operation, Maintenance And Installation Manual page 38

OVERSPEED REV LIMIT
The overspeed rev limit is set at an RPM greater than the operating range. In
the event that the engine is operated at an RPM greater than or equal to the
overspeed limit, the PCM does not allow the engine to maintain the power
requested by the operator. Refer to Specifications to determine this engine's
RPM limit.
Upon reaching the beginning of the rev limit, Engine Guardian will cut‑out the
ignition to specific cylinders. If the operator does not reduce engine speed,
Engine Guardian will cut‑out the ignition to all the cylinders. There is no audible
warning while Engine Guardian overspeed limit is active.
To reset the Engine Guardian protection:
1. Completely reduce the throttle for three seconds.
2. Engage the throttle. If the engine does not respond, repeat step one.
SMARTCRAFT PRODUCT
A Mercury SmartCraft System instrument package can be purchased for this
outboard. A few of the functions the instrument package will display are engine
RPM, coolant temperature, oil pressure, water pressure, battery voltage, fuel
consumption, and engine operating hours.
The SmartCraft instrument package will also aid in Engine Guardian
diagnostics. The SmartCraft Instrument package will display critical engine
alarm data and potential problems.
FEATURES AND CONTROLS
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