Mercury 4 FourStroke Manual page 41

While activation of the lanyard stop switch will stop the engine
immediately, a boat will continue to coast for some distance
depending upon the velocity and degree of any turn at shut
down. However, the boat will not complete a full circle. While the
boat is coasting, it can cause injury to anyone in the boat's path
as seriously as the boat would when under power.
If the operator falls out of the boat, stop the engine immediately
to reduce the possibility of serious injury or death from being
struck by the boat. Always properly connect the operator to the
stop switch using a lanyard.
We strongly recommend that other occupants be instructed on
proper starting and operating procedures should they be
required to operate the engine in an emergency (e.g. if the
operator is accidentally ejected).
Avoid serious injury or death from deceleration forces resulting
from accidental or unintended stop switch activation. The boat
operator should never leave the operator's station without first
disconnecting the stop switch lanyard from the operator.
Accidental or unintended activation of the switch during normal
operation is also a possibility. This could cause any, or all, of the
following potentially hazardous situations:
• Occupants could be thrown forward due to unexpected loss
of forward motion ‑ a particular concern for passengers in
the front of the boat who could be ejected over the bow and
possibly struck by the gearcase or propeller.
• Loss of power and directional control in heavy seas, strong
current or high winds.
• Loss of control when docking.
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GENERAL INFORMATION
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WARNING
WARNING
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