Humminbird 1157C User Manual

Page 39

NOTE: It is important to take your measurement in the figure showing
Measuring the Transom Angle, from exactly 12 inches down from the top of
the transom.

Place the two ratchets, one on either side of the transducer knuckle,
so that the beads on each ratchet line up with the desired position
number on the knuckle. If you are setting the ratchets at position 1,
the beads on each ratchet will line up with the rib on the transducer
knuckle to form one continuous line on the assembly.

NOTE: The ratchets are keyed; make sure that the square teeth on each
ratchet face the square teeth on the transducer knuckle, and the triangular
teeth face outward.

Hold the ratchets on the transducer knuckle with one hand and fit the
pivot arm over them until it snaps into place with the other hand.
Refer to the illustration.

Transducer Knuckle Positions

Ratchets Placed in Position 1

Ratchets Placed in Position 2

Fitting the Pivot Arm Over the Ratchet

Knuckle

Bead

Ratchet

Rib

Rib at
position 1

Beads

Ratchet

12”

Transom
Angle in
degrees
(°)

Measured
Distance (X)

Measuring the Transom Angle

Plumb
line

Weight