Garmin GT15M-TM Installation Instructions - Page 2

Installing the Transducer on a Trolling Motor

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The cables connected to the transducer should not be cut, because cutting the transducer cables voids your warranty. 1 Cut out the template. 2 With the template aligned vertically on the transom at the À installation location (Mounting Location Considerations, page 1), place the bottom corner of the template on the Á edge of the transom. You should avoid routing the cable close to electrical wires or other sources of electrical interference. Installing the Cable-Entry Cover If you routed the cable through the transom after you installed the transducer, you should install the cable-entry cover to keep water from entering your boat. 1 Place the cable-entry cover over the hole and the cable, À with the opening pointing downward, and mark the location of the two pilot holes. 3 Mark the center location of the two holes of the template. 4 Remove the template from the transom. 5 Wrap a piece (7/10 in.) from of tape around the point of the a 4 bit, mm (5/32 in.) bit to avoid drilling at 18 mm the pilot holes too deep. 6 If you are installing the bracket on fiberglass, place a piece of tape over the pilot-hole location to reduce cracking of the gel coat. 7 Using the 4 18 mm (7/10 mm in.) (5/32 in.) bit, drill the deep at the marked pilot holes locations. approximately 8 Apply marine sealant to the included 20 mm screws, and attach the transducer assembly to the transom. 9 Route the cable under the transom mount cable hook. 2 Remove the cable-entry cover, and, using a bit, drill the pilot holes approximately 10 mm 3.2 (3/8 mm in.) (1/8 in.) deep. 3 Fill the pass-through hole with marine sealant so it covers the cable completely and 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 all excess marine sealant. Installing the Transducer on a Trolling Motor NOTICE Do not cut the transducer cable. Cutting the transducer cable will void your warranty. 1 Insert a hose clamp (not included) through the slot on the À transducer mount , until equal lengths extend on both sides Á of the mount. 10If you must route the cable through the transom, choose a pilot-hole location well above the waterline and mark it. 11Place a cable clamp on the transducer cable, approximately halfway between the transducer and the top of the transom or the pilot hole. 12Mark the pilot-hole location for the cable clamp, and using a 3.2 (3/8 mm (1/8 in.) in.) deep. bit, drill a pilot hole approximately 10 mm 13Apply marine sealant to the included 12 mm screw, and attach the cable clamp to the transom. 14If you marked a pilot hole in step 3, using a 25 mm (1 in.) drill bit, drill a pass-through hole completely through the transom. 15Route the transducer cable to the sounder: • If you are routing the cable using a pass-through hole, push it through the hole you drilled in step 12, and install the cable-entry cover (Installing 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. 2 Place the transducer mount against the body of the trolling motor with the narrow end of the transducer pointed away from the propeller. 3 Secure the hose clamp around the body of the trolling motor, and tighten the hose clamp. 4 Position the transducer so it is parallel to the bottom when in use. 5 Use cable ties (not included) to secure the transducer cable. 6 Route the transducer cable to the installation location of the sounder while taking these precautions. • The cable should not be routed close to electrical wires or other sources of electrical interference. 2

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The cables connected to the transducer should not be cut,
because cutting the transducer cables voids your warranty.
1
Cut out the template.
2
With the template
À
aligned vertically on the transom at the
installation location (
Mounting Location Considerations
,
page 1
), place the bottom corner
Á
of the template on the
edge of the transom.
3
Mark the center location of the two holes of the template.
4
Remove the template from the transom.
5
Wrap a piece of tape around a 4 mm (
5
/
32
in.) bit at 18 mm
(
7
/
10
in.) from the point of the bit, to avoid drilling the pilot
holes too deep.
6
If you are installing the bracket on fiberglass, place a piece of
tape over the pilot-hole location to reduce cracking of the gel
coat.
7
Using the 4 mm (
5
/
32
in.) bit, drill the pilot holes approximately
18 mm (
7
/
10
in.) deep at the marked locations.
8
Apply marine sealant to the included 20 mm screws, and
attach the transducer assembly to the transom.
9
Route the cable under the transom mount cable hook.
10
If you must route the cable through the transom, choose a
pilot-hole location well above the waterline and mark it.
11
Place a cable clamp on the transducer cable, approximately
halfway between the transducer and the top of the transom or
the pilot hole.
12
Mark the pilot-hole location for the cable clamp, and using a
3.2 mm (
1
/
8
in.) bit, drill a pilot hole approximately 10 mm
(
3
/
8
in.) deep.
13
Apply marine sealant to the included 12 mm screw, and
attach the cable clamp to the transom.
14
If you marked a pilot hole in step 3, using a 25 mm (1 in.) drill
bit, drill a pass-through hole completely through the transom.
15
Route the transducer cable to the sounder:
•
If you are routing the cable using a pass-through hole,
push it through the hole you drilled in step 12, and install
the cable-entry cover (
Installing 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.
You should avoid routing the cable close to electrical wires or
other sources of electrical interference.
Installing the Cable-Entry Cover
If you routed the cable through the transom after you installed
the transducer, you should install the cable-entry cover to keep
water from entering your boat.
1
Place the cable-entry cover
À
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 3.2 mm (
1
/
8
in.)
bit, drill the pilot holes approximately 10 mm (
3
/
8
in.) deep.
3
Fill the pass-through hole with marine sealant so it covers the
cable completely and 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 all excess marine sealant.
Installing the Transducer on a Trolling Motor
NOTICE
Do not cut the transducer cable. Cutting the transducer cable
will void your warranty.
1
Insert a hose clamp
À
(not included) through the slot on the
transducer mount
Á
, until equal lengths extend on both sides
of the mount.
2
Place the transducer mount against the body of the trolling
motor with the narrow end of the transducer pointed away
from the propeller.
3
Secure the hose clamp around the body of the trolling motor,
and tighten the hose clamp.
4
Position the transducer so it is parallel to the bottom when in
use.
5
Use cable ties (not included) to secure the transducer cable.
6
Route the transducer cable to the installation location of the
sounder while taking these precautions.
•
The cable should not be routed close to electrical wires or
other sources of electrical interference.
2