Humminbird HELIX Series Installation Manual page 11

TRANSOM TRANSDUCER Installation Guide
3
Trailing edge (the edge farthest away from the boat).
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Correctly aligned: the transducer side seam is parallel with the water line.
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One click too low: the deeper the transducer is in the water, the more likely that a rooster tail of
spray will be generated at high speeds. You also risk the transducer being struck and damaged
by objects in the water, so make sure that the transducer is as high as it can be and still be
submerged in the water.
3. Continue to adjust until the transducer assembly until the bracket is also level from port to
starboard (horizontally level as you look at the transducer from behind the boat) (see Adjusting
the Horizontal Transducer Angle).
4. Once finalized, mark the correct position on the transom by tracing the silhouette of the
transducer mounting bracket with a pencil or marker.
5. Tighten the pivot bolt, using the nylock nut to lock the assembly. Hand-tighten only!
CAUTION! Do not use a high speed driver on this combination of fasteners. Hand-tighten only.
6. Hand-tighten the two mounting screws.
NOTE: You will drill the third mounting hole and finalize the installation after you route the cable
and test and finish the installation in the following procedures.
4
| Route the Cable
You can route the cable over the transom or through a hole in the transom above the waterline.
Your boat may have a pre-existing wiring channel or conduit that you can use to route the cable.
Select the routing method that is best for your boat configuration, and purchase any extension
cables, cable clips, clamps, etc. as needed.
Δ It is best to route the cable to the side of the transducer so the transducer will not damage
the cable during movement.
Δ The transducer can pivot up to 90 degrees in the bracket. Allow enough slack in the cable for
this movement.
Δ If you drill any holes, fill them with marine-grade silicone sealant.
Δ Excess Cable: If there is excess cable that needs to be gathered at one location, 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.
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 Humminbird® Technical Support.
CAUTION! Do NOT mount the cables where the connectors could be submerged in water or
flooded. If cables are installed in a splash-prone area, it may be helpful to apply dielectric
grease to the inside of the connectors to prevent corrosion. Dielectric grease can be
purchased separately from a general hardware or automotive store.
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| Connect the Cable
1. Connect the transducer cable to the transducer port on the control head.
The connector is keyed to prevent reversed installation, and insertion should be easy. Do not
force the connectors into the ports.
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532239-5_A
Adjusting the Horizontal
Transducer Angle
Routing the Cable
Fill the hole with
marine-grade silicone
sealant.