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Determining the Proper Location
Follow the steps below if you are mounting the transducer on the transom.
As a boat moves through the water, turbulence is generated by the weight of he boat, and the
thrust of the propeller(s). This turbulent water is normally confined in areas immediately aft of ribs,
strakes, and in the immediate area of the propeller(s). It is very important to locate the transducer
in an area which is relatively free of turbulent water. If the prop(s) are forward of the transom, it
may be impossible to find an area clear from turbulence, and a different mounting technique
should be considered. On outboard or inboard/outboard boats it is best to stay at least 15” to the
side of the propeller(s).
If possible, viewing the transom of the boat while the boat is moving will provide the best means
of locating clean water. If maximum high-speed operation is a high priority, this is the
recommended method. If this is not possible, select a location on the transom where the hull
forward of this location is smooth, flat. And free of protrusions or ribs.
Another consideration is the angle of deadrise. The transducer, when mounted, should point
straight down. The design of the transducer will allow a deadrise of 15 degrees and remain
pointed straight down. If the deadrise is greater than about 15 degrees it will be necessary to
angle the transducer slightly. While this does not significantly degrade performance, you must
keep in mind that the readout may be somewhat to one side of the boat.
On boats with stepped hulls, it may be possible to mount the transducer on the transom behind a
step, as this area of the transom will not be in contact with the water at high speed.
Drilling the Mounting Holes
Once you have identified the location, remove the mounting template from the front of this
manual. This template provides a means of ensuring that the deadrise of the transom falls within
the allowable limits, and it locates the three mounting holes which must be drilled.
Hold the template on the transom of the boat in the location you have selected. Align the template
vertically, ensuring the lower edge of the transom on either side of the template falls within the