Raytheon HSB L755, Owner'S Handbook Manual

Page: 49 / 224

Chapter 2: Installation 2-19
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Antifouling Paint
Marine growth can accumulate rapidly on the transducer’s surface, reducing
performance in weeks. Surfaces exposed to salt water must be coated with
antifouling paint.
Use water-based antifouling paint only.
Never use ketone-based paint since ketones can attack many plastics,
possibly damaging the transducer.
Reapply paint every six months or at the beginning of each boating season.
It is easier to apply antifouling paint before installation, but allow sufficient
drying time. As illustrated in Figure 2-14, paint the following surfaces:
Exposed area of the housing, including the acoustic window
Bore of the housing up to 1¼ " (30 mm)
Outside wall below lower O-ring
Exposed end of the paddle wheel insert
Paddle wheel cavity
Paddle wheel
Blanking plug below the lower O-ring and the exposed end
Figure 2-14: Antifouling Paint
Housing Paddlewheel
insert
Paint exposed housing
and bore up to 1.1/4" (30 mm)
Lower
'O' ring
Paint outside wall below the lower 'O' ring including
exposed end, paddlewheel cavity and paddlewheel
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