Tayana -48 Owner's Manual page 31

NOTE：
If any or all compartment contains an unusual amount
of accumulated water, please check the operation of bilge
pump by depressing the relevant switch and check the float
switch as well. Clear accumulated water and rectify the fault
immediately.
CAUTION!
Make sure that the bilge pump intake strainer is not
blocked with dirt. Regularly clean the intake strainer on the sump
and the filter of the system.
CAUTION!
Do not expect a manual bilge pump to save your boat if
you have a problem. The bilge pump is not intended to
enable flooding resulting from hull damage.
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