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2 echoInstallationInstructions

Notice
Do not cut the transducer cable. Cutting the transducer cable will void your
warranty.
1. Position the transducer mount
at the selected mounting location on the
transom (page 1).
2. Align the transducer parallel with the water line
, and mark the center
location of each hole on the transducer mount.
3. Using a
5
/
32
in. (4 mm) bit, drill the pilot holes approximately 1 in.
(25 mm) deep at the marked locations, while taking the following
precautions.
To avoid drilling the holes too deep, wrap a piece of tape around the
bit at 1 in. (25 mm) from the point of the bit to act as a guide.
If you are installing the bracket on berglass, place a piece of tape
over the pilot-hole location to reduce cracking of the gel-coat.
4. Apply marine sealant to the included 30 mm M5 screws, and loosely
attach the transducer assembly to the transom.
5. Adjust the transducer assembly so that it extends beyond the bottom of
the transom
approximately
1
/
8
in. (3 mm) on berglass hulls or
3
/
8
in.
(10 mm) on aluminum hulls
6. Make sure that the transducer is aligned parallel with the water line.
7. Tighten the 10-32 locking nut until it touches the mounting bracket and
then tighten
1
/
4
turn more (do not overtighten).
8. If you would like to route the cable through the transom, choose a pass-
through location well above the waterline
and mark it.
9. Use a
5
/
8
in. (16 mm) drill bit to drill a pass-through hole completely
through the transom.
10. Place a cable clamp on the transducer cable
, approximately one third
of the distance between the transducer and the top of the transom or the
pass-through hole.
11. Mark the pilot-hole location for the cable clamp, and, using a
1
/
8
in. (3.2
mm) bit, drill a pilot hole approximately
3
/
8
in. (10 mm) deep.
12. Apply marine sealant to the included 12 mm M4 screw, and attach the
cable clamp to the transom.
13. Repeat steps 10–12 using the other cable clamp.
14. Route the transducer cable to the echo device.
If you are routing the cable using a pass-through hole, feed it through
the hole you drilled in step 8, and install the cable-entry cover
(page 2).
If you are not routing the cable using a pass-through hole, route the
cable up and over the top of the transom
.
Avoid routing the cable close to electrical wires or other sources of
electrical interference.

If you routed the cable through the transom after you installed the transducer,
install the cable entry cover to keep water from entering your boat.
1. Place the cable-entry cover
over the hole and the cable,
with the opening pointing downward, and mark the location
of the two pilot holes.
2. Remove the cable-entry cover, and, using a
1
/
8
in. (3.2 mm)
bit, drill the pilot holes approximately
3
/
8
in. (10 mm) deep.
3. Fill the pass-through hole with marine sealant so that it covers
the cable completely, and that there is excess sealant around
the hole and the cable.
4. Place the cable-entry cover
over the hole and the cable,
with the opening pointing downward.
5. Apply marine sealant to the included 12 mm M4 screws, and attach the
cable-entry cover to the transom.
6. Wipe away any excess marine sealant.
2


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Others manual(s) of Garmin Echo 300C

Garmin Echo 300C User Manual - English - 28 pages

Garmin Echo 300C Installation Guide - German - 8 pages

Garmin Echo 300C Quick start guide - German - 24 pages

Garmin Echo 300C Installation Guide - Dutch - 6 pages

Garmin Echo 300C User Manual - Dutch - 28 pages


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