Maxum 3700 SY, Owner'S Manual Supplement

Page: 42 / 80

Chapter 6: Plumbing
36
Bilge Pump Testing
Bilge pumps are critical to the safety of your yacht.
Check the bilge pumps often to make sure that they
are working properly. Test each pump individually.
To test each bilge pump:
1. Turn On the manual switches at the helm.
2. Make sure that water in the bilge is
pumped overboard.
If there is water in the bilge and the pump motor is
running but not pumping:
1. Inspect the discharge hose for a kink or
collapsed area.
2. Check the bilge pump housing for clogging debris
as follows:
To check for clogging debris in pumps:
1. With your thumb and forefinger squeeze the hold-
ing tabs on each side of the power cartridge.
2. Lift out the power cartridge.
3. Check the pump and the housing and clear
any debris.
Reinstall the power cartridge:
1. Align the tabs and slots and press firmly until the
tabs click into place.
2. Make sure that the power cartridge is locked
into place.
Autofloat Switches
•
The automatic bilge pumps use float (autofloat)
switches to automatically turn On the pumps when-
ever water rises to a preset level in the bilge.
•
The autofloat switches are normally mounted next to
the bilge pumps they control.
•
The autofloat switches should be tested often for
proper operation as follows.
To test a float switch:
1. Turn On the float switch by twisting the white plastic
knob 1/4 turn.
2. The bilge pump should turn On.
3. If twisting the knob does not turn the pump On,
check the circuit breaker on the battery
management panel.
4. If the circuit breaker is On, but the pump still does
not work, it may indicate a bad switch or possibly a
low battery.
5. Release the knob to lower the float and return the float switch to auto mode.
SLOT (TYPICAL
EACH SIDE)
TABS
TAB
AUTOFLOAT
KNOBS
SWITCH