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Installation
For planing hulls – Install in the flat planing area near the stern.
Always install forward of the propeller(s) and shaft(s).
For small displacement hulls – Install near the centerline of the
hull and 1/3 of the way forward from the stern. Always install forward
of the propeller(s) and shaft(s).
For large displacement hulls – Install near the centerline of the hull
and 1/3 of the way aft from the bow. Always install forward of the
propeller(s) and shaft(s).
For sailboats – Install forward of the leading edge of the keel, to
one side and near the centerline of the hull.
2. Choose a location where you can easily reach the transducer from
inside the boat. This will allow you to service the unit. Allow at least
6" (152 mm) of headroom above the transducer.
3. When choosing a mounting location, drill a small pilot hole (1/8" or
3.2 mm) from the inside of the hull. Before you drill the hole, be sure
you will be able to reach the large nut on the top of the unit, and that
there will be enough clearance for the cable. If there is a strake or
other feature on the hull, drill from the outside of the hull instead.
(This small hole can be filled easily if the mounting location is not
suitable.)
4. The position of the transducer is especially critical on high speed
boats (capable of more than 20 knots). Check the locations of the
transducers on similar boats before installing the transducer in your
own boat. Choose the location which will offer the best performance.
5. If the bottom of the hull at the mounting location is flat, you can
mount the transducer directly through the hull. If the hull rises at an
angle (the “deadrise angle”) of more than 10°, you must include a
mounting block or “fairing.” The transducer must be mounted in a
vertical position. Attach the fairing block to the hull as firmly as
possible. This fairing block must be able to resist the drag of the
water against the hull, and must also be completely waterproof.
6. If the hull of the boat has a core-type hull, you will need to follow
special mounting procedures. The core material must be protected
from any water which may leak from the inside of the boat. (If the
core material is remains wet, it may rot and weaken the hull.)
7. When working with the transducer, support it by holding the body of
the unit or the rings. Do not hang the transducer from the cable.