Bennett Marine Premier Line Systems - Manual (Page 3)

Step 1: Positioning Tabs
Position the trim tabs against the transom and check to see that the upper mounts of the hydraulic actuators do not center on an inside
obstruction. If they do, reposition tabs slightly outboard. The further outboard the tabs are mounted, the greater the lateral
(side-to-side) control. Position tabs 8-10 cm (3"-4") from the chine and run towards
the centerline of the boat.
Step 2: Securing Tabs
Attach the hinge plate and backing plate (mounting plates), and trim tab with
6mm (1/4") stainless steel fasteners along the bottom of the transom.
(See Figure 1) Using the backing plate as a template, mark screw hole locations.
Assemble mounting plates and tab, dip screws in marine epoxy before running in.
Support the trim tab from below, then slide trim tab between backing plate and hinge
plate before running screws tight. Snug screws down to secure mounting plates and
trim tab to transom. If the transom is curved, a shim must be made of a suitable
material to provide a flat mounting surface.
Figure 1
Installation Instructions for Dual Acting SST System
3
IMPORTANT: FOR BOATS KEPT IN SEAWATER
THIS SYSTEM MUST BE PROTECTED FROM ELECTROLYSIS AND GALVANIC CORROSION —
THIS DAMAGE IS NOT COVERED UNDER WARRANTY
To provide protection from electrolytic corrosion a zinc anode must be applied to each tab. In the case of tabs installed on the
boat as original equipment by the builder, a bonding system may be utilized for your particular model. The SST system top
portion of the actuator and the actuator shaft are electrically isolated from each other. Therefore the trim plane and the
upper part of the actuator must be individually protected or integrated into a bonding system.
MUST USE ANTI-FOULING PAINT
Trim tabs and actuators should be painted with anti-fouling paint to prevent fouling by marine growth.
Follow paint manufacturer’s recommendations for proper priming and painting of stainless steel.
NOTE: Do not paint under zincs — this prevents electrical contact with trim tabs.
READ THIS FIRST BEFORE BEGINNING INSTALLATION
IMPORTANT FOR ACTUATOR INSTALLATION ON ALL BOATS
Actuators must be installed perpendicular to the trim tabs and parallel to each other. Stainless steel is not flexible.
Measurements have to be precise.
BE CAREFUL NOT TO ROTATE THE ACTUATOR SHAFT — ROTATING THE SHAFT WILL DAMAGE THE INTERNAL SENSOR.
Backing
Plate
Hinge
Plate
Trim Tab
7mm (9/32") Mounting Holes for
6mm (1/4") Fasteners