Lowrance Lowrance and Eagle Speed or Speed User Manual

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 tran­som mounted paddlewheel speed sensor or combination speed/temp sen­sor. 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.

good location

Transom showing mounting location.

Once you've determined the proper location for the unit, place the sen­sor 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.

Rear view

Bottom of hull

Speed sensor rear view.

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Transom

Side view

Bottom of hull

Speed sensor side view.

Route the sensor's cable through or over the transom to the sonar unit.
If you need to drill a hole in the transom to pass the connector through,
the required hole size will depend on the connector on the end of your
sensor's cable. If the sensor has a manual locking collar connector, you
will need to drill a 7/8" hole. If it has a push-on self-sealing connector,
you will need to drill a 5/8" hole.

Manual locking collar connector Push-on self-sealing connector

requires a 7/8" hole. requires a 5/8" hole.

Caution:

If you drill a hole in the transom for the cable, make sure it is lo­cated above the waterline. After installation, be sure to seal the
hole with the same marine grade above- or below-waterline seal­ant used for the screws.

NOTE:

If your sonar unit is an Eagle product, you can only use one acces-
sory at a time. If you would like to use a speed sensor and a tem­perature sensor at the same time, you will need a combination de­vice. See the Accessory Ordering Information on the back page.

The sensor is now ready for use. Connect the sensor to the accessory
plug on the back of the unit. See your sonar unit owner's manual for
details on use. If you have any questions concerning the installation of
the sensor, please contact your local boat dealer.

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