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1. MOUNTING
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.
Adjustments
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.
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 pro-
vided. 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 ma-
rine sealant to the threads of the three #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.
11º transom angle
2º-10º
NO SHIM
transom
angle
shim with
taper down
YES
YES
parallel
parallel
12º-18º transom angle
NO SHIM
YES
NO
slight
angle
angle
reversed
Sensor position and transom angle
17
19º-22º
transom
angle
shim with
taper up
YES
parallel
NO
angle too
steep
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