13
Transom Mount Considerations
Transom mounted transducers are intended for low
speed boats with external props. Boats with inboard
motors and boats that regularly exceed 35MPH can
not use transom mounted transducers. This is because
with inboard motors the prop is located in front of the
transom transducers and create aeration and excess
turbulence.
I/O motors where the prop is aft of the transom do
not create this situation, but be careful that the
driveshaft of the I/O does not block the forward
horizontal scan. Boats that exceed 40MPH run a risk
of having the transom mounted transduers torn free
of the transom. The transom mounted transducers are
not designed to be used at these speeds.
Transom mounted transducers are mounted on kick-
up or break-away brackets. This allows the brackets
to kick up at about speeds above 35-40MPH or if
they strike an object. Once kicked up, the transducers
must be manully reset in order to function.
Transom Transducer Kick-Up
Bracket
The transom transducer is attached to the boat with a
heavy-duty stainless steel kick-up bracket to provide
protection against impact. When the transducer
strikes an object, or the water force exceeds the
resistance of the bracket, the transducer automatically
kicks up and becomes non-operational. The bracket
does not automatically reset at lower speeds. The
transducer must be manually returned to its
operational position.
Special Note: The kick-up feature is designed as a
safety consideration to prevent the transducer from
being removed from the boat due to impact or
excessive speed. The kick-up bracket is not designed
for repeated kick-up or to be pulled up manually
during loading and unloading from boat trailers.
Tests have shown that the bracket can kick-up as
many as 30 times before there is a negative effect on
the bracket. Repeated kick-up will cause the
transducer to kick-up at progressively lower speeds.
Excessive kick-ups can cause the transducer bracket
to fail. Brackets that fail due to repeated kick-up are
not covered under the transducer warranty.
If the transducer must be kicked up for installation,
Suggested materials required for installation:
♦
Variable speed electric drill with a chuck
capacity of 10mm (3/8”) or larger.
♦
Hole saw or spade bit 19 mm (7/8”) for
transom hole to route cable and
connector
♦
Chamfer bit or 6 mm (1/4”) drill bit
♦
Drill bit No. 28 or 4 mm (9/64”)
♦
Drill bit 3 mm (7/64”)
♦
Marine bedding/sealing compound
Note: Will
Not Work at
Speeds Above
35 MPH
Transom Mount Bracket in Released Position
Summary of Contents for ULTRASCAN PC90
Page 1: ......
Page 5: ...5 Specifications 47 How To Obtain Service 51 9 Advanced Networking Information 48 Warranty 55...
Page 53: ...53 This Page for Notes...
Page 54: ...54 This Page for Notes...
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