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8.1 General
In the raw or seawater systems, the livewell
seawater pump is mounted to a seacock on a
thru-hull tting located in the aft systems com-
partment bilge. The water system pressure pump
is connected to an auxiliary supply tting at the
base of the livewell pump. Always make sure all
valves are open before attempting to operate any
component of the raw water system.
Priming the System
Make sure the seacock valve is open and the Raw
Water Pump switch in the helm switch panel is
on. Run the pressure pump by turning on the
raw water washdown hose faucet valve until all of
the air is purged from the system, then turn the
valve o. Turn the livewell switch on and run the
livewell pump until all of the air is purged from
the system, then turn the pump o.
The intake for the livewell centrifugal pump is
equipped with a scoop and ball valve. If the pump
runs but will not prime, make sure the valve is
open. If the pump still won’t prime, it may be
air locked. Make sure the valve is open and run
the boat at or above 15 M.P.H. Water pressure
from the scoop will force the trapped air through
the pump and allow it to prime. If this procedure
doesn’t work, contact your Blackn dealer.
Closing the thru-hull valve before the boat is
hauled from the water will help to eliminate air
locks in the raw water system. The valve should
also be closed whenever you leave the boat un-
attended.
Notice:
It may be necessary to reprime the raw wa-
ter system if it is not used for an extended
period and at the time of launching.
8.2 Raw Water System Operation
A high pressure pump, controlled by a pressure
sensor, is activated by the Raw Water Pump switch
in the helm switch panel. When activated, the
pressure switch will automatically control the
pump that supplies the raw water hose connector.
As the pressure builds in the system, the pump
will shut o. When the system is in use and the
Chapter 8:
Livewell Supply Pump, Auxiliary Supply Fitting & Seacock
RAW WATER SYSTEM
Raw Water Pump
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