1
Pub. 988-0147-571
Installation Instructions for
Lowrance
and Eagle
Speed or Speed/Temp Sensors
This instruction sheet will help you install your Lowrance or Eagle tran-
som mounted paddlewheel speed sensor or combination speed/temp sen-
sor. Please read all instructions before proceeding.
Recommended tools for this job include: drill, 5/8" or 7/8" drill bit, 1/8" drill
bit for pilot holes, screwdriver. Required supplies for this job include: four
#8 stainless steel wood screws (3/4" long),
high quality, marine grade
above- or below-waterline caulking compound. Some equipment depends
on your sensor model. See page 2 for details.
To install the speed sensor, first find a location on the boat's transom
where the water flow is smoothest. Don't mount the sensor behind strakes
or ribs. These will disturb the water flow to the speed sensor. Make sure
the sensor will remain in the water when the boat is on plane. Also make
sure the location doesn't interfere with the boat's trailer. Typically, the
sensor is mounted about one foot to the side of the transom's centerline.
Transom showing mounting location.
Once you've determined the proper location for the unit, place the sen-
sor on the transom. The bottom of the bracket should be flush with the
hull's bottom. Using the sensor as a template, mark the hull for the
screws' pilot holes. Drill four 1/8" holes, one in each end of the slots.
Mount the sensor to the hull using #8 stainless steel wood screws (not
included). Use the caulking compound to seal the screws. Make sure
the sensor is flush with the bottom of the hull and tighten the screws.
Speed sensor rear view.
good location
Rear view
Bottom of hull
