Specifications

20
Sonar unit with external speed sensor.
The temperature sensor is built into the transducer.
Speed Sensor Installation
The following instructions describe how to install the speed sensor.
Recommended tools include: drill, 5/8" drill bit, 1/8" drill bit for pilot holes,
screwdriver.
Required supplies 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.)
To install speed sensor:
1. 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 transduce
r
SP-U speed only
senso
r
Sonar unit
rear view
Power/trans-
ducer cable
12-volt battery
3-amp fuse
HST-WSU