31
Sonar unit with external speed sensor.
The temperature sensor is built into the transducer.
Speed Sensor Installation
If you wish to purchase an optional sensor for your unit, refer to the
accessory ordering information inside the back cover of this manual.
The following instructions describe how to install the speed sensor.
Recommended tools for this job include: drill, 5/8" 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. (If you intend to route the sensor
cable through the same hole as the transducer cable, you will need a 1"
(25.4 mm) drill bit instead of the 5/8" drill bit.)
First find a location on the boat's transom where the water flow is smooth-
est. Don't mount the sensor behind strakes or ribs. These will disturb the
Temperature sensor
built into transducer
SP-U speed only
sensor
Sonar unit
rear view
Power/trans-
ducer cable
12-volt battery
3-amp fuse
HST-WSU