Humminbird 1158c Combo Installation And Operation Manual page 48

4. Routing the Cable
The transducer cable has a low profile connector, which must be routed to the point where the
control head is mounted. There are several ways to route the transducer cable to the area where
the control head is installed. The most common procedure routes the cable through the transom
into the boat.
NOTE: Your boat may have a pre-existing wiring channel or conduit that you can use for the transducer
cable.
1. Unplug the other end of the transducer cable from the control head. Make sure that the
cable is long enough to accommodate the planned route by running the cable over the
transom.
CAUTION! Do not cut or shorten the transducer cable, and try not to damage the cable insulation.
Route the cable as far as possible from any VHF radio antenna cables or tachometer cables to reduce
the possibility of interference. If the cable is too short, extension cables are available to extend the
transducer cable up to a total of 50'. For assistance, contact the Customer Resource Center at
humminbird.com or call 1-800-633-1468 for more information.
NOTE: The transducer can pivot up to 90 degrees in the bracket. Allow enough slack in the cable for
this movement. It is best to route the cable to the side of the transducer so the transducer will not
damage the cable during movement.
2a. If you are routing the cable over the transom of the boat, secure the cable by attaching
the cable clamp to the transom, drilling 9/64" diameter holes for #8 x 5/8" wood screws,
then skip directly to procedure 5, Connecting the Cable.
Routing the Cable
Transom Mount - DualBeam™ PLUS
or...
2b. If you will be routing the cable through a hole in the
transom, drill a 5/8" diameter hole above the waterline.
Route the cable through this hole, then fill the hole with
marine-grade silicone sealant and proceed to the next step
immediately.
3. Place the escutcheon plate over the cable hole and use it as
a guide to mark the two escutcheon plate mounting holes.
Remove the plate, drill two 9/64" diameter x 5/8" deep
holes, and then fill both holes with marine-grade silicone
sealant. Place the escutcheon plate over the cable hole and
attach with two #8 x 5/8" wood screws.
4. Route and secure the cable by attaching the cable clamp to
the transom; drill one 9/64" diameter x 5/8" deep hole, then
fill the hole with marine-grade silicone sealant, then attach
the cable clamp using a #8 x 5/8" screw.
5. Plug the other end of the transducer cable back into the
control head connection holder.
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