Eagle FISHMARK 640C Installation And Operation Instructions Manual page 22

3. Assembling the transducer.
A. One-piece bracket: Once you determine the correct position for the
ratchets, assemble the transducer as shown in the following figure.
Don't tighten the lock nut at this time.
B. Two-piece bracket: Once you determine the correct position for the
ratchets, assemble the transducer as shown in the figure in step 2B.
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 trans-
ducer's centerline should be in line with the bottom of the hull. Don't
let the bracket extend below the hull!
Bolt
Flat washer
Assemble transducer and bracket.
Metal
washer
Nut
Rubber
washers
Assemble transducer and bracket.
Bolt
16
Lock washer
Nut
Flat washer
Metal washer