Furuno TZT12F Installation Manual page 22

1. MOUNTING
Mount the sensor close to the centerline of your
boat. On slower heavier displacement hulls, posi-
tioning it farther from the centerline is acceptable.
For single drive boat, mount on the star-board side
at least 75 mm (3") beyond the swing radius of the
propeller, as shown in the right figure.
For twin drive boat, mount between the drives.
Note 1: Do not mount the sensor in an area of tur-
bulence or bubbles, near water in-take or discharge openings; behind strakes, struts,
fittings, or hull irregularities; behind eroding paint (an indication of turbulence).
Note 2: Avoid mounting the sensor where the boat may be supported during trailering,
launching, hauling, and storage.
Pretest for speed and temperature
Connect the sensor to the instrument and spin the paddlewheel. Check for a speed
reading and the approximate air temperature. If there is no reading, return the sensor
to your place of purchase.
How to install the bracket
1. Cut out the installation template (enclosed with transducer) along the dotted line.
2. At the selected location, position the template, so the arrow at the bottom is
aligned with the bottom edge of the transom. Being sure the template is parallel
to the waterline, tape it in place.
Warning: Always wear safety
goggles and a dust mask.
3. Using a 4 mm, #23, or 9/64" bit, drill
three holes 22 mm (7/8") deep at
the locations indicated. To prevent
drilling too deeply, wrap masking
tape around the bit 22 mm (7/8")
from the point.
Fiberglass hull: Minimize surface cracking by chamfering the gelcoat. If a
chamfer bit or countersink bit is not available, start drilling with a 6mm or 1/4" bit
to a depth of 1 mm (1/16").
4. If you know your transom angle, the bracket is designed for a standard 13°
transom angle.
11°-18° angle: No shim is required. Skip to step 3 in "Adjustments".
Other angles: The shim is required. Skip to step 2 of "Adjustments".
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 three #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 steps 1-4 in
"How to attach the sensor to the bracket", before proceeding with "Adjustments".
1-14
75 mm (3")
minimum beyond
swing radius
Align template vertically.
Deadrise angle
Slope of hull
Parallel to
waterline
Align template arrow with
bottom edge of transom.