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Antifouling Paint
Marine growth can accumulate rapidly on the sensor's
surface reducing performance within weeks. Surfaces
exposed to salt water that do not interlock, must be coa-
ted 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 dama-
ge 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 house-
hold detergent. If fouling occurs, use a stiff brush or putty
knife to remove the growth being careful to avoid scrat-
ching the transducer's face. In severe cases, wet sand
the paddlewheel with fine grade wet/dry paper.
Servicing the Speed Sensor
If the paddlewheel becomes fouled or inoperable, it can
be removed for cleaning. Remove the two screws from
the speed sensor (see Fig. 11). Slide the speed sensor
upward to remove it from the transducer housing. Grasp
the paddlewheel and pull to access the shaft.
IMPORTANT! The paddlewheel must be oriented
correctly to measure boat speed.
After cleaning, slide the paddlewheel onto the shaft (see
Fig. 8). Orient the short side of the paddlewheel blade as
shown on the side view. Fit the shaft into the holes in the
retaining bars. Slide the assembly into the speed sensor
housing. Re-attach the speed sensor.
Replacement Parts
Replace broken or worn parts immediately. The water-
lubricated paddlewheel bearings have a life of up to 5
years on low-speed boats [less than 10 kn (11 MPH)]
and 2 years on high-speed vessels. Purchase parts from
your Volvo Penta dealer.
Part
Paddlewheel Kit
Bracket Kit
Part Number
3588302
3588303
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