Autofloat Switches - Maxum 4100 SCA Sportyacht Owner's Manual Supplement

Bilge Pump Testing
Bilge pumps should be checked often to verify that they are
working properly. To test a bilge pump's operation, activate
the dash-mounted switch and verify that bilge water is pumped
overboard. If bilge water is present and the pump motor is run-
ning but not pumping, inspect the discharge hose for a kink or
collapsed area. If no problems are found, check the bilge pump
housing for clogging debris as follows:
1. Remove the power cartridge:
a. Lift the tab while rotating the fins counterclockwise.
b. Lift out the power cartridge.
c. Clear the outer housing of debris.
2. Reinstall the power cartridge:
a. Make sure the "O" ring is properly seated.
b. Coat the "O" ring with a light film of vegetable or
mineral oil.
c. Align the two cams on either side of the power
cartridge with the two slots on the outer housing and
press the power cartridge into the housing while
twisting clockwise. To ensure proper reinstallation,
attempt to twist the fins counterclockwise without lift-
ing the tab; the cartridge should stay in place.
Discharge of oil, oil waste or fuel into navigable waters is prohibited by law. Violators are
subject to legal action by the local authorities.

Autofloat Switches

Automatic bilge pumps use electromagnetic float (autofloat) switches to automatically activate the pump whenever
bilge water accumulates above a preset level. One autofloat switch is mounted next to the bilge pump it activates, and
is wired directly to the battery so it will function even when the yacht is completely shut down and left unattended.
Autofloat switches should be tested often for proper operation as follows:
To test a float switch:
1. Push the float switch test button up to
activate the bilge pump. If the pump does
not turn on, check the inline fuse. If the
fuse is good but the switch doesn't work,
it may indicate a bad switch or possibly a
low battery.
2. Push the test button all the way down
to return the float switch back into the
auto mode.
When test is completed the float switch, you MUST push the test button all the way down to the
auto position to turn the switch back into auto mode!
BILGE PUMP
COMPONENTS
LIGHT
FILM
OF OIL
NOTICE
FLOAT UP - TEST MODE
BILGE PUMP SHOULD TURN ON
! CAUTION!
4100 SCA Sport Yacht
Chapter 2: Components/Systems
TAB
"O" RING
CAM
POWER
(TYPICAL) CARTRIDGE
FLOAT SWITCH OPERATION
FLOAT SWITCH
TEST BUTTON
(TYPICAL)
FLOAT DOWN - AUTO MODE
BILGE PUMP SHOULD TURN OFF
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Owner's Manual Supplement
25
FIN
OUTER
HOUSING
SLOT (TYPICAL)