Westerbeke WPDS-20 Technical Manual page 12

any case, use a section of flexible hose
that will not collapse under suction, be-
tween the hull inlet and engine and between
the outlet and the exhaust system. This
takes up vibration and permits the engine
to be moved slightly when it's being re-
aligned. Do not use street elbows in
suction piping. All pipe and fittings
should be of bronze. Use sealing compound
at all connections to prevent air leaks.
The neoprene impeller in the sea (raw)
water pump should never be run dry.
FUEL TANK AND FILTERS
Fuel tanks may be of fiberglass, monel,
aluminum, plain steel or terne plate. If
made of fiberglass, be certain that the
interior is gel coated to prevent fibers
from contaminating the fuel system.
Copper or galvanized fuel tanks should not
be used. It is not necessary to mount the
tank above the engine level as the fuel lift
pump provided will raise the fuel from the
tank. The amount of lift should be kept
minimum (6 feet being maximum). If a tank
is already installed above engine level it
can be utilized in this position. Great
care should be taken to ensure that the fuel
system is correctly installed so that air-
locks are eliminated and precautions taken
against dirt and water entering the fuel.
A primary fuel filter of the water col-
lecting type should be installed between
the fuel tank and the fuel lift pump. A
recommended type is available from the
list of accessories. The secondary fuel
filter is fitted on the engine between the
fuel lift pump and the injection pump and
has a replaceable element.
As the fuel lift pump has a capacity in
excess of that required by the injection
pump, the overflow is piped to the fuel
tank and should be connected to the top of
the tank or as near the top as possible.
To insure satisfactory operation, a
diesel engine must have a dependable sup-
ply of clean diesel fuel. For this reason,
cleanliness and care are especially im-
portant at the time when the fuel tank is
installed, because dirt left anywhere in
the fuel lines or tank will certainly
cause fouling of the injector nozzles when
the engine is started for the first time.
FUEL PIPING
We recommended copper tubing together
with suitable fittings, both for the supply
line and the return line. Run the tubing
in the longest pieces obtainable to avoid
11
the use of unnecessary fittings and con-
nectors. The shut off valve in the line
between the fuel tank and engine should be
of the fuel oil type, and it is important
that all joints be free of pressure leaks.
Keep fuel lines as far as possible from
exhaust pipe for minimum temperature, to
eliminate "vapor locks".
The fuel piping leading from the tank
to the engine compartment should always be
securely anchored to prevent chafing.
Usually the copper tubing is secured by
means of copper straps.
The final connection to the engine
should be through flexible rubber hoses.
ELECTRIC PANEL
The Westerbeke all-electric panel util-
izes an electronic tachometer with a
built-in hour meter. Tachometer cables
are no longer required, except for the
Skipper mechanical panel. Mounted on the
panel are an ammeter, water temperature
gauge and oil pressure gage. Each instru-
ment is lighted. The all-electric panel
is isolated from ground and may be mounted
where visible. It is normally pre-wired.
WESTERBEKE ALL-ELECTRIC PANEL
SKIPPER MECHANICAL TACH PANEL
ELECTRICAL EQUIPMENT
Most Westerbeke engines are supplied
pre-wired and with plug-in connectors.
Never make or break connections while the
engine is running. Carefully follow all
instructions on the wiring diagram sup-