Lowrance Mark-5x DSI Installation And Operation Manual page 6

Installation
3. Hold the transducer assembly against the transom. Look at
the transducer from the side. If it is parallel to the ground,
then the "A" position is correct.
4. If the transducer can not be adjusted so its face is parallel
to the ground, remove the transducer and ratchets from
the bracket. Reinsert the ratchets into the bracket, this
time with the letter "B" aligned with the dot stamped in the
bracket. Reassemble the transducer and bracket and place
it against the transom.
5. Check to see if the transducer will adjust so its face is parallel with the ground.
Repeat this process until the transducer can be adjusted so its face is parallel
with the ground.
C. Assembling the bracket
After determining the correct position for
the ratchets, loosely assemble the transducer
and bracket assembly.
Metal washer
Lock nut
Rubber washers
Ratchets
4
Place the
transducer and
bracket against
the transom.
Metal washer
Bolt