MJM Yachts 40z Express - Manual (Page 19)

4.1
4.2
STEERING CONTROL SYSTEM
STEERING SYSTEM
The 40z has an integrated, electronically controlled power steering system which through electric
motors rotate the two IPS pod drives below the hull. When running, the 40z is steered as with
outboards or sterndrives. Thrust of the propellers is directed more immediately and precisely from
side to side through a 26° arc to steer the boat.... rather than bouncing the prop wash from a
conventional straight shaft propulsion unit off a rudder.
When the throttle/shift levers are put in (N) neutral and a button pushed to activate the IPS
joystick: Control of the pod drives is transferred from the throttle/shift levers to the IPS computer
controlled joystick. When the joystick is activated, the steering wheel locks and no longer
functions. Do not try to force it or damage may occur.
Emergency Alignment If a fault occurs which prevents one or both of the propulsion units from
being operated with the steering wheel, it is possible to align the faulty propulsion unit(s) so that
its aimed straight ahead (and won’t act like a rudder), so as not to impair operation of either the
remaining propulsion unit or the steering of the boat with the two engines. See pages 58-60 of
the VPOM.
Emergency Steering These controls are attached to the engine with cables, so if the electronic
steering ever failed on both propulsion units, a steering method using the two engines can be
employed. This is outlined on pages 60-61 of the VPOM.
IPS JOYSTICK DOCKING CONTROL
This control is used only for docking and
maneuvering at slow speed. Learn to handle
the joystick in a safe and correct manner
before you start using the function in tight
quarters. When the joystick is active,
the normal engine controls are Neutral
and inactive. A computer operates the drives and
shifting. Rotation of the wheel is frozen and it
should not be turned, as damage may occur.
To Activate: Both engines must be running
and the engine control handles must be IN
NEUTRAL. Press “DOCKING” button. A beep
confirms it is active.
To Deactivate: Either move the engine
controls OUT OF NEUTRAL (forward or
reverse) or press “DOCKING” button again. A
double beep will confirm that it is OFF.
Boost Function In windy weather or current when you need more oomph, push the right
“HIGH” button after having frst activated the “Docking” button. A beep will confirm it’s engaged.
Deactivate by pushing the button again. You’ll hear a double-beep confirmation.
DPS - “DYNAMIC POSITIONING SYSTEM” OPTION. If the boat is equipped with this option to
hold the boat on it’s heading and GPS position, it is activated by pushing the upper left button and
deactivated by pushing it again, or simply engaging the engine controls.
Maneuvering with Joystick Follow the arrows. Lean the joystick post in the direction you’d like
to go. Release and the thrust stops. The boat may keep moving, so you may have to tap it in the
opposite direction to stop it. The top of the joystick is rotated to orient the bow and stern, or to
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CHAPTER 4