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If you do not know the transom angle,
temporarily attach the bracket and
sensor to the transom to determine if
the plastic shim is needed.
5. Using the two #10 x 1-1/4” self-tapping
screws, temporarily screw the bracket to
the hull. DO NOT tighten the screws
completely at this time. Follow the step
1-4 in “Attaching the Sensor to the
Bracket”, before proceeding with
“Adjusting”.
Adjusting
1. Using a straight edge, sight the
underside of the sensor relative to the
underside of the hull. The stern of the
sensor should be 1-3 mm (1/16-1/8”)
below the bow of the sensor or parallel
to the bottom of the hull.
11° transom angle
NO SHIM
12-18° transom angle
NO SHIM
2°-10°
transom
angle
19°-22°
transom
angle
shim with
taper up
shim with
taper down
parallelparallel parallel
slight
angle
angle
too steep
angle
reversed
YES NONO
YES YESYES
Sensor position and transom angle
Note: Do not position the bow of the
sensor lower than the stern because
aeration will occur.
2. To adjust the sensor’s angle relative to
the hull, use the tapered plastic shim
provided. If the bracket has been
temporarily fastened to the transom,
remove it, Key the shim in place on the
back of the bracket.
2°-10° transom angle (stepped
transom and jet boats): Position the
shim with the tapered end down.
19°-22° transom angle (small
aluminum and fiberglass boats):
Position the shim with the tapered end
up.
3. If the bracket has been temporarily
fastened to the transom, remove it.
Apply a marine sealant to the threads of
the two #10 x 1-1/4” self tapping screws
to prevent water seeping into the
transom. Screw the bracket to the hull.
Do not tighten the screws completely at
this time.
4. Repeat step 1 to ensure that the angle
of the sensor is correct.
Note: Do not position the sensor farther
into the water than necessary to avoid
increasing drag, spray, and water noise
and reducing boat speed.
5. Using the vertical adjustment space on
the bracket slots, slide the sensor up or
down to provide a projection of 3 mm
(1/8”). Tighten the screws.
Cable cover
Cable
clamp
50 mm (2")
Hull projection 3 mm (1/8")
Vertical adjustment and cable routing