Furuno Ls4100 Mounting location, Height required at mounting location, Installation of bracket

Transom hole: 19mm or 3/4” (optional)

Cable clamp holes: 3mm or 1/8” Screwdrivers

Straight edge Marine sealant Pencil Zip-ties

Water-based antifouling paint (mandatory in salt water).

Mounting location

To ensure the best performance, the sensor must be submerged in aeration-free and turbulence-free water. Mount the sensor close to the centerline of the boat. On slower heavier displacement hulls, positioning it farther from the centerline is acceptable.

Allow adequate space above the bracket for it to release and rotate the sensor upward.

Height without
speed sensor
191mm (7-1/2")	Height
Height with
speed sensor
213mm (8-1/2")

Height required at mounting location

Note 1: Do not mount the sensor in an

area of turbulence or bubbles: near water intake 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.

Note 3: For single drive boat, mount on the starboard side at least 75 mm (3”) beyond the swing radius of the propeller.

75mm(3") minimum beyond swing radius

Mounting location on single drive boat

Note 4: For twin drive boat, mount between the drives.

Installation of bracket

1.Cut out the installation template shown on the left.

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.

P66 Installation template

for starboard side of boat

Drill at locations labeled "B"

for the following transom angles:

16° through 22°

B B B

A A A

Drill at locations labeled "A"

for the following transom angles:

2° through 15°

Align arrow with bottom of transom

Align template vertically.

Deadrise angle

Slope of hull parallel to waterline

Align template arrow with bottom edge of transom.

Positioning the template

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