Humminbird HELIX Series Installation Manual page 8

TRANSOM TRANSDUCER Installation Guide
Turbulence-Free Mounting Guidelines
It is very important to locate the transducer in an area that is relatively free of turbulent water.
Consider the following to find the best location with the least amount of turbulence:
1
Avoid areas where there is turbulent water flow. Turbulent water is normally confined to areas
immediately aft of ribs, strakes, or rivets on the bottom of the boat, and in the immediate area
of the propeller(s). The best way to locate turbulence-free water is to view the transom while
the boat is moving.
2
Observe your propeller's direction of rotation (in forward, as you're facing the stern of the boat
from behind). Clockwise propellers create more turbulence on the port side. Counterclockwise
propellers create more on the starboard side.
3
Ensure there is adequate distance from the propeller(s). On outboard or inboard/outboard
boats, it is best to locate the transducer at least 15" (38.1 cm) to the side of the propeller(s).
4
The ideal mounting location (right of the propeller[s]). It is important to note that if you plan
to trailer your boat, do not mount the transducer too close to trailer bunks or rollers to avoid
moving or damaging the transducer during loading and unloading of the boat.
5
For boats with stepped hulls, it may be possible to mount the transducer on the step. Do not
mount the transducer on the transom behind a step to avoid popping the transducer out of the
water at higher speeds.
6
The transducer must be mounted so that it is parallel with the waterline, but fully submerged
in the water during operation.
7 If you have a Side Imaging® transducer, the transducer must NOT have anything obstructing
the 'view' of the side looking beams. For example, nothing can be in the line of sight of these
beams (not a hull, motor, or other transducer, etc.)
NOTE: You may need to tilt the motor up and out of the way when using the side looking
beams.
Deadrise: The hydrodynamic shape of your transducer allows the sonar beams to point down
without deadrise adjustment.
1
| Prepare the Mounting Location
1. Confirm the boat is level on the trailer (both from port to starboard and from bow to stern).
2. Hold the mounting bracket against the transom of the boat in the location you have selected.
Align the bracket horizontally, using the level. Make sure that the lower corner of the bracket
does not protrude past the bottom of the hull.
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7
Unobstructed View: This jack plate
installation gives the transducer safe
distance from the motor and turbulence.
The Side Imaging has a clear view side-
to-side.
2