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24 DS400 and DS500 Digital Fishfinders
Operation and Maintenance
Releasing the transducer
The transducer releases easily when it is fastened to the hull. Give a sharp
blow to the bottom of the transducer using the palm of the hand.
CAUTION:
Never strike the transducer with anything except the palm of the hand.
Never strike the paddlewheel
Antifouling Paint
Marine growth can accumulate rapidly on the transducer’s surface reducing
performance within weeks. Surfaces exposed to salt water that do not
interlock, must be coated with anti-fouling paint. Use water-based anti-
fouling paint only. Never use ketone-based paint, since ketones can attack
many types of plastic possibly causing damage to the transducer. Apply paint
every 6 months or at the beginning of each boating season.
Cleaning
Clean the transducer with a soft cloth and mild household detergent. If
fouling occurs, use a stiff brush or putty knife to remove the growth being
careful to avoid scratching the transducer’s face. In severe cases, wet sand the
paddlewheel with fine grade wet/dry paper.
Servicing the Paddlewheel
If the paddlewheel becomes fouled or inoperable, remove it for cleaning.
Remove the cover by depressing the latch near the paddlewheel. Using a
small finish nail, push the shaft out. (see Figure 2-12 ).