MJM Yachts 40z Express User Manual
Page 21
4.4
4.5
STEERING CONTROL SYSTEM
CONSOLE SWITCH PANEL
With the exception of the Anchor Washdown which is activated along with the “Windlass” breaker
(and must have the “Water Pressure” switch ON as does the washer function of the “Wiper”
switch) functions of this panel on the console are activated by turning on their respective breaker
switches on the DC Electrical Panel in the main saloon.
Functions of the panel rocker switches are described below the corresponding switch:
Press to
Sound
HORN
TRIM TAB SYSTEM
The trim tab breaker on the DC panel must be ON for the
unit to work. The arc series of lights, on either side of
the LectroTab panel are wired to show what the tabs are
doing under the boat. Push BOW DOWN STBD, you’ll
see the lights to port appear. The port tab is going down
to lift the aft port side of the boat to make the starboard
bow lean down.
Normally tabs are adjusted simultaneously with 2 fingers.
Trim tabs aren’t necessary at low speeds or high speeds
other than for wind compensation.
At speeds over 8 knots, trim tabs allow you to trim the
boat from side to side to compensate for crew location,
gear placement or to counteract wind pressure. The boat leans into the breeze. They are useful in
lowering the bow for better visibility or for powering into waves without pounding. Don’t hesitate
to apply maximum tabs in the 15-22 knot range. At higher speeds in smooth water,when the boat
naturally runs flatter or when running downsea into the back of waves, it’s advisable to raise the
trim tabs for dry running and control, allowing the bow to lift.
The 40z with IPS drives has 48”x12” of trim tabs on each side of the transom.
This is a lot of tab area, installed to make it possible to lower the bow going into larger seas in the
10-20 knot range. Applying trim tabs unevenly at speeds over 20 knots under certain conditions
- 20 -
CHAPTER 4
AUTO HORN
FWD Underway
1 Blast
AFT at Anchor
2 Blasts
WIPERS
Press when
Wash Rode,
Chain & Anchor
with Fresh Water
WASHERS
Read Instr
Booklet.
NAV LTS
FWD
Underway
AFT
At Anchor