Westerbeke BCD 4.4KW Operator's Manual page 29

Sea Water Intake System
Make sure the intake system (sea water cooling system) is in proper order. Check that the hull inlet, sea
cock and strainer are unobstructed. Sea cocks and strainers should be at least one size greater than the
inlet thread of the sea water pump. The strainer should be of the type that may be withdrawn for cleaning
while the vessel is at sea and should be mounted below the water line to ensure self-priming. Inspect the
sea water lines to make sure there are no collapsed sections, which would restrict water flow. Make sure
there are no air leaks at any of the connections.
Cooling System
The generator's engine is fresh water-cooled by an
engine-mounted heat exchanger. Sea water is used
as the heat exchange's cooling medium. Sea water
is pumped into the exchanger by a sea water pump
and is then injected into the exhaust discharge, car-
rying with it the heat removed from the engine's fresh
water cooling system.
Sea water should be supplied to the sea water pump
through a flush-type through-hull fitting using a wire-
reinforced hose between the through-hull fitting and
the sea water pump. This sea water should be
DEflECTION AT
directed through a visual-type sea water strainer and
LONGEST SPAN
then delivered to the pump. Hoses routed from the
through-hull fitting to the strainer and to the sea water
pump should be wire-reinforced to prevent the hose
from collapsing during the generator's operation (suc-
tion from the pump may collapse a non-reinforced
hose). Sea water strainers should be mounted at or
below the water line to make sure the sea water line
remains primed.
CAUTION
DO NOT use a scoop-type through-hull fitting as a means of supplying sea water to the gen-
erator. Water pressure against this type fitting, while the vessel is under way, can push sea
water past the sea water pump's impeller into the generator's exhaust system, filling it and the
engine as well. Flush-type, clear, through-hull fittings are recommended and should be lo-
cated on the hull so as to be below the waterline during all angles of boat operation.
The use of common-type street elbows is not recommended for plumbing the sea water circuit. These
generally have very restrictive inside diameters. Machined fittings are preferred.
Electrical System
The electrical system should be checked to make sure all wiring harnesses are properly tied down with
clamps or plastic ties and that all wiring harnesses are spaced at intervals close enough to prevent chafing
from vibration. Check to make sure all engine harness connections are tight and that they are made to the
appropriate terminals.
Westerbeke Generators 26