mjm yachts 50z Downeast, Owner'S Manual

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STEP 4 Start Engines
Tum ON ALL Engine Battery Switches p4. If an engine start battery is low the ENGINE
EMERGENCY PARALLEL switch p8 can be turned on until underway when alternator is
functioning, then turned OFF.
CAUTION – If you try to turn on the IGNITION switch for one
engine and have not previously turned on the Battary Switches for ALL, you will be bombarded
with noise and warnings and could do damage to the engine software.
Press ON the upper IGNITION switch for each engine then wait to be sure the Volvo Engine
Display is reading on the dash and that no WARNINGS or ALARMS appear. If they do, so
see Volvo Engine Manual.
Push START/STOP switch for each engine to right of helm and be sure the RPM is
reading about 600 RPM. A 2
nd
row of engine data showing RPM, NMPG and Coolant
Temperature for each engine can be displayed by dragging down a second data bar on
the top of Raymarine E165 displays.
STEP 5 Check IPS, Steering and Trim Tab Function
IPS
With the engine controls in Neutral (IPS doesn’t work otherwise and you should
not try to steer the boat with the wheel in IPS mode), push the lower left “Docking”
button under the IPS joystick and listen for a confirming beep. Briefly test its operation
with a slight tap in any direction. The boat is now ready to operate with the Joystick
only.
CAUTION
Make sure no one is on the foredeck or handling a dock-line when
this test is performed.
DPS
Dynamic Positioning System holds the boat on it’s current heading and GPS
position automatically. It can be used (carefully) for solo operation when departing or
arriving at a slip to hold the boat in place while attaching or detaching dock lines. To
activate DPS.
Push the IPS button (if engaged) once to disengage it then push the DPS
button above it to engage DPS. You don’t want to do this when you are moving,
because the DPS will react abruptly/violently to return to the spot where you pushed the
DPS button. The DPS will not engage if you are moving at more than 3 knots. But, best
be at 0 knots.
CAUTION
Never get off the boat when docking with DPS activated
without having a midships spring line in hand, in case the GPS changes it’s mind.
TRIM TABS
The trim tabs can be operated two ways, both equally together using the
rocker switch on the left control arm or independently using the far left and far right
rockers on the face of the control shift housing. The % trim tab is shown on the Volvo
Penta Display. Initially put both tabs at approximately 50%, adjust right or left for windage
and at speeds over 30 knots lower tabs into the 20-30% range. Take them off when at
slow, non-planing speeds.
STEP 6 Cast Off
When you are confident everything is in order, cast off and secure all dock lines and
fenders. When maneuvering with IPS joystick remember a light touch (taps) on the joy
stick with short bursts are sufficient to move the boat in the direction desired.