34 Transducers for Fishfinders
Installation
1. Measure the deadrise angle of thehull at the selected location
usinga levelandprotractor(see Figure 2-14 ).Measurecarefully,
since the installed transducer mustbe within 5 ° of vertical.
WARNING:
Always wearsafetygoggles and a dust mask.
2. Thehull surfaceto bebonded mustbe smoothand free ofpaintor
any other finish. If thesurface is rough, use a disc sander to
smooth an area 4" (100 mm) in diameter.
3. Remove any dust, grease or oil with a weak solvent, such as alco-
hol, to ensure a good bond.Clean and dry both the selected area
and the undersideof the base.
4. Using a carpenter’s square, draw a line on the hull perpendicular
to the keel through the center ofthe mounting location. This will
be used as a guideline to orient the base.
Figure 2-14: Deadrise Angle
5. The numbers on the flange of the base represent deadrise angles.
Identifythenumber thatmostclosely correspondstothe deadrise
angle of your hull. Find its match on the oppositeside ofthe
flange. Keeping the keeldirection arrowson the side of the base
nearest the keel, align the two raised marks indicating your
deadriseangle with the guidelinedrawn on the hull (see Figure 2-
15 ).
D5002-2
Deadrise angle
Flange
Base
Hull
Parallel to waterline
Guideline
perpendicular
to keel
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