Humminbird 1158c Combo Installation And Operation Manual page 38

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' (15 m). For assistance, contact the Customer Resource Center at
humminbird.com or call 1-800-633-1468 for more information.
NOTE: Since the transducer may need to pivot up to 90° in the bracket if it strikes an object, make sure
there is sufficient cable slack to accommodate this motion. It is best to route the cable to the side of
the transducer so the cable will not be damaged by the rotation of the transducer.
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
Storing Excess Cable
Transom Mount - Side Imaging®
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.
NOTE: If there is excess cable that needs to be gathered at one
location (as shown in the illustration), dress the cable routed from
both directions so that a single loop is left extending from the
storage location. Doubling the cable up from this point, form the
cable into a coil. Storing excess cable using this method can reduce
electronic interference.
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