Owner`s manual

3100 OFFSHORE
27
2.5 Steering System
The steering system is hydraulic and made of two main components: the helm assembly and the hydraulic
cylinder. The helm unit acts as both a fluid reservoir and pump. Turning of the helm, or steering wheel, pumps
the fluid in the hydraulic hoses and activates the hydraulic cylinder causing the rudders to turn. A slight
clicking sound may be heard as the wheel is turned. This sound is the opening and closing of valves in the
helm unit and is normal. Refer to the manufacturer owner’s manual for specific information on the steering
system.
Dual engine inboard boats have two rudders. These are coupled together at the tiller arms by a tie bar. The
rudders are set parallel to each other to provide maximum stability on straight ahead runs and proper tracking
through corners. Rudder or steering system damage may require the rudders to be realigned.
2.6 Trim Tabs
The trim tabs are recessed into the hull on the transom. Helm mounted
switches are used to control the trim tabs. The switches are labeled and
control bow up and down movement. It also controls starboard and port
up and down movements. Bow up and bow down will control the hull
planing attitude, while port and starboard up and down provide control for
the hull trim side to side.
Before leaving the dock, make sure that the tabs are in the full “UP”
position by holding the control in the bow up position for ten (10) seconds.
Always establish the intended heading and cruise speed before attempting
to adjust the hull attitude with the trim tabs. After stabilizing speed and
direction, move the trim tabs to achieve a level side to side running attitude
being careful not to over trim.
After depressing a trim tab switch, always wait a few seconds for the change in the trim plane to take effect.
Avoid depressing the switch while awaiting the trim plane reaction. By the time the effect is noticeable
the trim tab plane will have moved too far and thus the boat will be in an overcompensated position.
When running at a speed that will result in the boat falling off plane, lowering the tabs slightly, bow down,
will improve the running angle and operating efficiency. Too much bow down tabs can reduce operating
efficiency and cause substantial steering and handling difficulties.
Be extremely careful when operating in a following sea. The effect of trim tabs is amplified under such
conditions. Steering and handling difficulties can result from improper trim tab usage, particularly in a
following sea. Always raise the tabs to the full bow up position in these conditions.
When running at high speeds be sure that the tabs are in the full “UP” position. Only enough trim plane
action should be used to compensate for any listing. Trim tabs are extremely sensitive at high speeds. Adjust
for this and be prepared to slow down if difficulties arise.
When running into a chop, a slight bow down attitude will improve the ride. Be careful not to over trim.
Handling difficulties may result.
Trim Tab Plane