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SPEED ACCESSORY INSTALLATION
NOTE: You will only need to perform this procedure if you have a Speed-Only Sensor.
The Speed accessory incorporates a paddlewheel-type speed sensor in a high-impact
plastic housing. The module is intended for installation on the transom, and will work
well on almost any boat.
In addition to the parts supplied, you will need a hand drill with various bits, marine-
grade silicone sealant, and a Phillips head screwdriver.
Install the Speed accessory:
1. Locate an area on the transom of your boat that will be 6” to 8” or farther from
the transducer(s). This area must also maintain contact with the water, even at
high speeds. Do not mount the accessory directly in front of the propeller or
outdrive, and make sure that there are no protrusions such as ribs, rows of
rivets, or transducers directly forward of the mounting location, as these may
affect the flow of water over the paddlewheel.
2. Align the accessory on the transom so that the lower edge is flush with the hull
of the boat and the tab on the bottom of the housing aligns with the bottom of
the hull, and mark the hole locations. If the transom angle is excessive, a fairing
block may be needed to level the paddlewheel for proper operation.
3. On fiberglass hulls, it is best to start with a smaller drill bit and use progressively
larger bits to reduce the chance of chipping or flaking the outer coating. Drill
two 9/64” (3.5 mm) mounting holes approximately 3/4” (19 mm) deep.
4. Seal the mounting holes with marine-grade silicone sealant, and attach the
module to the transom using the two washers and two screws provided.
Hand tighten only!
Escutcheon Plate
1
Wood Screw and Washer
2
Cable Clamp
3
Axial Clip
4
Wedge
5
Paddlewheel
6
Speed Accessory
7
1
3
4
5
6
7
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