B&G H2000 Pilot *DISCONTINUED* - Manual (Page 219)

HB-0845-06 219
6.7 ROUTINE MAINTENANCE
6.7.1 Through-hull housings
Keep the screw threads of through-hull housings well
greased with silicone or water pump grease. Ensure that the
outer surfaces of the housing are properly coated with anti-
fouling paint.
6.7.2 Boat speed sensor (paddlewheel type)
Use a stiff brush to remove marine growth that may cause
the paddlewheel to freeze, and then clean the surfaces with a
very weak solution of household detergent. If fouling is very
severe, push the paddlewheel axle out by using a small drift,
and then very gently, wet sand the surface with a fine grade
wet/dry paper.
Inspect the o-rings on both the sensor and the blanking plug
and replace if necessary, and then lubricate with silicone
lubricant or petroleum jelly (Vaseline
®
).
6.7.3 Boat speed sensor (ultrasonic type)
Aquatic growth can accumulate rapidly on the transducer
surface reducing performance. Clean the surface with a soft
cloth and a very weak solution of household detergent. If
fouling is severe, use a stiff brush or a putty knife. Take care
not to cause scratches on the transducer face. Wet sanding
using fine grade wet/dry paper is permissible to remove
stubborn deposits.
Surfaces exposed to salt water must be coated with
antifouling paint. Use only water-based antifouling paint.
Solvent-based paints must not be used. Solvent-based paints
contain ‘ketones’ which may attack the plastic surfaces and
damage the sensor. Re-apply the antifouling paint every six
months or at the start of each boating season.