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Fishfinder 90/140 Owner’s Manual 9
INSTALLING YOUR FISHFINDER > INSTALLING THE TRANSDUCER
To mount the transducer on a transom:
1. Position the transducer mount at the selected
transom location. Make sure the transducer is
parallel with the water line. Mark the center locations
of each hole on the transducer mount. (See the
figures on the next page.)
2. Using a 5/32" bit, drill the pilot holes approximately
1" (25 mm) deep at the marked locations. To avoid
drilling the holes too deep, wrap a piece of tape
around the bit at 1" from the point of the bit.
3. Apply marine sealant to the 5 x 30 mm screws.
Attach the transducer assembly to the transom
using the 5 x 30 mm screws. Adjust the transducer
assembly to extend beyond the bottom of the
transom approximately 1/8" (3 mm) on fiberglass
hulls or 3/8" (10 mm) on aluminum hulls. Adjust the
transducer assembly to be aligned parallel with the
water.
4. Tighten the 10-32 locking nut until it touches the
mounting bracket, and then tighten 1/4 turn more.
(Do not overtighten.)
5. Place the first cable clamp on the transducer cable
approximately one third of the distance between
the transducer and the top of the transom. Mark
the location. Using a 1/8" bit, drill a pilot hole
approximately 3/8" (10 mm) deep.
6. Attach the cable clamp using a 4 x 12 mm screw.
Coat the screw with marine sealant before
installation. Repeat steps 5 and 6 using the other
cable clamp.
7. Route the transducer cable, as needed, to the
Fishfinder. DO NOT CUT THE CABLE. Avoid routing
the cable with electrical wires or other sources of
electrical interference.