Quad-Engine Throttle And Shift Operation - Mercury 71712 Operation Manual

If a failure should occur while underway which causes one of the outer engines into forced neutral/idle condition, the center
engine will also be forced to neutral/idle. Operation to the center engine can be restored by moving the control handle of the
functioning outer engine back into neutral and then engaging.
Quad‑Engine Throttle and Shift Operation
Movement of the handles on the remote control allows the boat operator to control the engine throttle speed and gear shift
positions of all four engines.
The throttle and shift function is dependent on what engines are running. Refer to the following table.
Port Inner
Port Outer Engine
Engine
Running Running
Running Running
Off Off
Off (ignition key
Running
switch turned ON)
Running Running
Off (ignition key
switch turned Running
OFF)
Running Running
Running Off
Off (ignition key
Running
switch turned ON)
Turning off the starboard outer engine while underway will cause the starboard inner engine to go into forced neutral/idle.
Operation to the inner engine can be restored by turning the starboard outer engine ignition key to the ON position and moving
the starboard control handle back into neutral position and then engaging. The inner engine speed and gear shift will then be
controlled by the starboard control handle.
Turning off the port outer engine while underway will cause the port inner engine to go into forced neutral/idle. Operation to the
inner engine can be restored by turning the port outer engine ignition key to the ON position and moving the port control handle
back into neutral position and then engaging. The inner engine speed and gear shift will then be controlled by the port control
handle.
Turning off one of the inner engines while underway will have no effect on the operation of the outer engines.
If a failure should occur while underway which causes the starboard outer engines into forced neutral/idle condition, the inner
starboard engine will also be forced to neutral/idle. Operation to the inner engine can be restored by moving the starboard
control handle back into neutral and then engaging.
If a failure should occur while underway which causes the port outer engines into forced neutral/idle condition, the inner port
engine will also be forced to neutral/idle. Operation to the inner engine can be restored by moving the port control handle back
into neutral and then engaging.
90-8M0180922 MAY 2021
eng
Starboard Starboard Outer
Inner Engine Engine
Running Running
Off Off
Running Running
Running Running
Off (ignition key
Running
switch turned ON)
Running Running
Off (ignition key
Running
switch turned OFF)
Off Running
Off (ignition key
Running
switch turned ON)
Section 1 - DTS Controls and Features
Control Handle Function
Port inner and outer engines throttle and shift =
controlled by port control handle
Starboard inner and outer engines throttle and shift =
controlled by starboard control handle
Port inner and outer engine throttle and shift = controlled
by port control handle
Starboard inner and outer engine throttle and shift =
controlled by starboard control handle
Port inner engine throttle and shift = controlled by port
control handle
Starboard inner engine throttle and shift = controlled by
starboard control handle
Port inner engine throttle and shift = controlled by
starboard control handle
Starboard inner engine throttle and shift = controlled by
port control handle
Port outer engine throttle and shift = controlled by port
control handle
Starboard outer engine throttle and shift = controlled by
starboard control handle
Port inner engine throttle and shift = controlled by port
control handle
Starboard inner engine throttle and shift = controlled by
starboard control handle
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