Eagle 128 Installation And Operation Instructions Manual page 13

Ratchets
Insert bolt and check transducer position on transom.
3. Assembling the transducer.
position for the ratchets, assemble the transducer as shown in the
following figure. Don't tighten the lock nut at this time.
4. Drilling mounting holes. Hold the transducer and bracket assembly
against the transom. The transducer should be roughly parallel to the
ground. The transducer's centerline should be in line with the bottom
of the hull. Don't let the bracket extend below the hull!
Mark the center of each slot for the mounting screw pilot holes. You
will drill one hole in the center of each slot.
Drill the holes using the #29 bit (for the #10 screws).
Metal
washer
Nut
Rubber
washers
Assemble transducer and bracket.
Once you determine the correct
Bolt
9
Metal washer