Humminbird 900 Series - Manual (Page 16)

5. Set the gimbal bracket aside and drill the four mounting screw holes
using a 5/32" (4.0 mm) drill bit.
6a. If the cables must pass through a hole directly beneath the
mounting bracket, mark and drill an additional 1" (25 mm) hole
centered between the four mounting holes. Route the cables
through the 1" hole. Place the hole cover over the mounting surface
hole, then use it to mark the position of the two mounting screws.
Remove the hole cover, drill the two mounting holes using a 9/64"
bit. Do not install the hole cover at this time.
6b. If the cables cannot be routed directly beneath the mounting
bracket, mark and drill a 1" (25 mm) hole that will allow you to run
the cables close to the bracket. Pass the cables through the 1" (25
mm) hole, routing the cables through the grommet and pressing the
grommet into place. Place the hole cover over the mounting surface
hole, then use it to mark the position of the two mounting screws.
Remove the hole cover, drill the two mounting holes using a 9/64"
(3.5 mm) bit, fill them with marine-grade silicone, then replace the
hole cover and insert the #8 Phillips countersink wood screws.
Hand-tighten only.
7. Place the mounting bracket on the mounting surface aligned with
the drilled holes and fill the mounting holes with marine grade
silicone. Insert the four #10 Slotted-Hex wood screws into the
mounting holes. Hand-tighten only.
8. If the cable pass through hole is beneath the mounting bracket, you
will need to install the hole cover. Place the hole cover over the
mounting bracket cable pass thru hole and align with holes drilled
in step 6a. Insert the #8 Phillips countersink wood screws. Hand
tighten only.
NOTE: Be sure that the cables pass through the slots on the hole cover and that
there is enough cable slack to allow for the control head to pivot through its full tilt
range. Extra cable slack will also help when connecting/disconnecting the cables.
Mounting Screws 1
Washer 2
Gimbal Mounting Bracket 3
1
3
2
9