Furuno GP-3500F Installation Manual page 22

Installation of bracket
1. Cut out the installation template shown below.
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.
Installation template
for starboard side of boat
Drill at locations labeled "B"
for the following transom angles:
16 through 22
B
A
Drill at locations labeled "A"
for the following transom angles:
2 through 15
Align arrow with bottom of transom
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 "Adjusting".
Other angles: The shim is required. Skip to step 2 of "Adjusting".
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.
B
B
A
A
15
Align template vertically.
Deadrise angle
Slope of hull
parallel to
waterline
Align template arrow with
bottom edge of transom.
Positioning the template