Owner`s manual

3070 EXPRESS
Trim Tab
2.6 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 motors 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 steering
manufacturer owner’s manual for specific information on the steering system.
Dual engine outboards are coupled at the tiller arms by a tie bar. The engines must be aligned
so they are parallel with each other to provide maximum stability on straight ahead runs and
proper tracking through corners. Engine or steering system damage may require the engines to
be realigned.
2.7 Trim Tabs
The trim tabs are recessed into the hull below the swim platform and integrated transom engine
mounting system. A dual toggle switch is used to control the trim tabs. The switch is labeled
and controls bow up and down movements. 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 listing.
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.
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