Install The Transducer - Humminbird APEX Series Installation Manual

TRANSOM TRANSDUCER Installation Guide
1
| Mount the Transom Bracket to the Boat
1. Confirm the boat is level on the trailer (both from port to starboard and from bow to stern).
2. Hold the mounting bracket against the transom of the boat in the location you have selected.
Align the bracket horizontally, using the level. Make sure that the lower corner of the bracket
does not protrude past the bottom of the hull.
If your propeller moves clockwise as the boat moves forward (as you're facing the stern of
the boat from behind), mount the transducer on the starboard side. If your propeller moves
counterclockwise as the boat moves forward (as you're facing the stern of the boat from
behind), mount the transducer on the port side.
15" (380 mm) from prop(s)
3. Continue to hold the bracket on the transom of the boat, and use a pencil or marker to mark
where to drill the three mounting holes. Mark the drill holes near the top of each slot, making
sure that your mark is centered in the slot.
4. Make sure the drill bit is perpendicular to the actual surface of the transom, NOT parallel to
the ground, before you drill.
Using a 5/32" (4.0 mm) bit, drill the three holes to a depth of approximately 1" (25 mm).
NOTE: On fiberglass hulls, it is best to use progressively larger drill bits to reduce the chance
of chipping or flaking the outer coating.
5. Use a marine-grade silicone sealant to fill the drilled holes.
6. Align the transom bracket with the mounting holes. The center slot should be above the two
outer slots. Confirm the bracket is level.
7. Using a hand socket/nut driver, install the three #10-1" (25 mm) screws into the drilled holes,
but do not tighten completely.
NOTE: Make sure the mounting screws are snug, but do not fully tighten the mounting
screws at this time to allow the transducer assembly to slide for adjustment purposes.
2

| Install the Transducer

The transom bracket allows you to adjust the height, and the pivot bolts allow you to adjust the
angle of the transducer. These adjustments help reduce cavitation and air bubbles around the
transducer during operation.
1. Align the transducer bracket with the holes on top of the transducer.
2. Use a Phillips-head screwdriver to install a 7/16" (11 mm) screw and #8 split ring lock washer
into each bracket hole (6 holes total). Hand tighten each screw until each split ring lock washer
flattens. Hand tighten only.
3. Align the holes on the transducer bracket with the holes on the transom bracket.
Using the Mounting Bracket to Mark the Drill Holes
TOP
Use 5/32"
drill bit.
Drill
Drill Drill
Level
TOP
Use 5/32"
drill bit.
Drill
Drill Drill
3
532508-4_A
Attaching the Bracket
to the Transom