Adjusting And Testing; Cleaning And Maintenance - Navman TRANSOM MOUNT Installation Manual

If the cable is to pass through the transom:
1
Drill 3/4"
(19 mm)
hole in
transom
Insert cable
through hole
Drill the hole a safe
distance above water line.
If you are unsure where to
put the hole, consult a
qualified boatbuilder.
Do not cut the cable.
Wiring
The transducer has a cable to connect it to the
navigation instrument. When fitting this cable:
• Keep the cable away from other cables and
equipment (for example fluorescent lights,
power inverters and VHF transmitters).
• Do not cut the cable.
• If necessary, extend the cable by adding a
NAVMAN 13 ft (4 m) extension cable (a

Adjusting and testing

Adjust and test the transducer after the
transducer and instrument have been installed
and with the boat in at least 6 ft (2 m) of water.
1 With the boat moving slowly, turn the
instrument on. If the depth does not
display, follow the troubleshooting
instructions in the instrument manual.
2 Gradually increase boat speed. If the
depth does not display then:
i Remove any oil from the transducer by
wiping the face of the transducer with
mild detergent on a cloth.
ii Adjust the angle of the transducer by
pushing the end down another click.
iii Loosen the screws then slide the
transducer mounting bracket down or
up in steps of 0.1" (2.5 mm) to achieve

Cleaning and maintenance

Clean a transducer with a damp cloth or mild detergent. Avoid abrasive cleaners and petrol or other
solvents. When repainting the hull, cover or remove any transducers. Do not paint the transducer. Do
not use a high pressure water blast on a speed sensor paddlewheel as it may damage the bearings.
Transom Mount Transducers Installation Manual
2 Cable clamp
Drill 7/64"
(3 mm), apply
sealant in
holes
Fit screws
Fit one or two cable clamps on transom to
hold cable.
Important: Fit a cable clamp close to the
transducer. This may prevent the
transducer from causing damage should
the bracket break while the boat is moving.
3
Cable cover
Mark holes,
Drill 7/64"
(3 mm)
Fit cable cover over cable hole
in transom.
Fill the following with sealant:
maximum of one cable can be used).
Ensure no cable connectors lay in the bilge.
Note: There is no extension cable
available for the FISH 4100.
Secure the cable at regular intervals.
Refer to the navigation instrument's
installation manual for instructions on how
to connect the cable to the instrument.
best high speed performance. Several
adjustments might be required to find
the optimum position.
iv Review the position of the transducer
(see Position of transducer at the
beginning of this manual).
3 Once adjustments are completed, ensure
that all screws are tight, the pivot bolt is
tight and all holes are filled with sealant.
Note i: If the transducer kicks up at high
speed then the pivot bolt needs to be tighter.
Note ii: If you find that your transducer is
causing a ' Rooster tail ' then the likely
cause is the transducer being mounted too
deep. Lifting the transducer mounting on
the transom should solve the problem.
Apply sealant
Fit screws
• Cable hole in transom.
• Inside the cable cover.
• The screw holes.
5