Trim Tabs - Chris-Craft 2015 21 Carina Owner's Manual

Trim Tabs

Hydraulic Trim tabs
conditions. In addition they are used to adjust for listing due to uneven loading and propeller torque.
Ensure trim tabs are completely retracted when backing
the boat. Damage to the trim tabs may result otherwise.
Theory of Operation: Trim
tabs are used to modify the
running angle of the boat. The
Chris-Craft is designed to
plane at a particular speed
and weight distribution.
As weight increases and/or
speed decreases, the stern
settles creating an inefficient,
untrimmed condition. In this
bow-high position, visibility is
limited, fuel economy is poor
and wake is large.
Additionally the hull bottom
may be pounded by waves.
Trim tabs allows the vessel to
plane at heavier loads and
slower speeds than the
designed planing speed.
Figure 3-24. Trim Tab Control Switches
3-24
(Figure 3-21) help adjust the vessel trim for weather, cross-winds, and water current
Figure 3-21. Plate & Zinc
Systems
Figure 3-23. Trim Tab Zinc
Figure 3-25. Trim Tab Switches
The trim tab system consists of:
Hydraulic Pump and Reservoir
•
Trim Tabs
•
Control Switches
•
Zinc
•
Trim Tab
Pump &
Reservoir
Figure 3-22. Bennett
Trim Pump
And Reservoir
3-24