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Transom Mount Transducer (520-5PWD)
Overview
This type of mounting is very commonly employed, usually on
relatively small I/O or outboard boats. Do not attempt this
mounting on an inboard boat because turbulence is created by the
propeller ahead of the transducer.
Procedure
1
.
Attach the transducer to the bracket.
2. To determine a suitable transducer mounting location, run the
boat at several speed ranges and observe the water flow at the
rear and near the transom. Suitable location is at least 50 cm
away from engine and where the water flow is smooth.
3. On a relatively flat hull, the transducer is mounted flush with
the hull-bottom, and there are two choices of installation as
shown on the next page. Note that the direction of the
transducer and fixing holes used on the brackets are different in
each method. Although there is less influence from air bubbles
with method (2), you must be careful not to damage the
transducer when the boat is hauled out of the water/put on the
trailer. On a deep "V" hull, mount the transducer using method
(2). It should be mounted as near as the bottom edge of the
transom, and the transducer face must be parallel with the
seabed, not with the hull bottom.
4. Mark the screw locations by holding the transducer in position
on the transom.
5. Drill four pilot holes.
6. Mount the transducer and secure it with four self-tapping
screws. Apply a small amount of sealing compound under the
head of each screw to preserve the watertight integrity of the
transom.
7. Adjust the transducer position so that the transducer face is
level with the sea surface the seabed.
8. If necessary, to improve water flow and minimize air bubbles
staying on the transducer face, incline the transducer about 5
degrees at the rear. This may require a certain amount of
experimentation for fine tuning at high cruising speeds.
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