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459 Motoryacht • Owner’s Manual
Chapter 6: Plumbing
Checking diaphragm type bilge
pump and strainer for clogging
debris:
1. Clear any debris from the pump
valves inside the pump housing as
follows:
a. Unscrew the two screws on the
housing clamp.
b. Remove the housing clamp.
c. Open the housing.
d. Clear the housing of debris.
e. Return the housing to the closed
position.
f. Reinstall the housing clamp.
2. Visually inspect the strainer for any
clogging debris. To clean the
strainer of debris:
a. Remove the strainer plate.
b. Clear debris from the strainer
plate and the strainer.
c. Reinstall the strainer plate.
3. Read the manufacturer’s instruction manuals for additional maintenance and winterizing instructions.
SCREW
BILGE PUMP
HOUSING CLAMP
SCREW
HOUSING (OPEN)
HOUSING (CLOSED)
BILGE PUMP
STRAINER
STRAINER PLATE
Autofloat Switches
• Each automatic bilge pump features an autofloat
switch.
• The autofloat switch turns the pump On when water
rises above a preset level.
• Each autofloat switch is normally located next to the
bilge pump it controls.
• The autofloat switches should be tested often.
KNOBS
Autofloat switch testing:
1. Twist either of the white plastic knobs one quarter
turn to lift the float and turn On the bilge pump.
• If the pump does not turn On, check the push-toreset circuit breaker.
• If the circuit breaker is good, but the switch still
does not work, it may mean the switch is bad, or the
battery is dead.
AUTOFLOAT
SWITCH
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