Fuel System; Fuel Lift Pump; Fuel Filters - Westerbeke 80N4 Operator's Manual

FUEL SYSTEM
DIESEL FUEL
Use No.2 diesel fuel with a cetane rating of 45 or higher. Do not
use kerosene or home heating fuel.
FUEL WATER SEPARATOR
A primary fuel filter of the water separating type must be
installed between the fuel tank and the engine to remove
water and other contaminants from the fuel before they can
be carried to the fuel system on the engine.
Most installers include a type of filter/water separator with
the installation package as they are aware of the problems
that contaminants in the fuel can cause.
A typical fuel filter/water separator is iIIustrated below. This
is the Raycor Model 445. Keep in mind that if a water
separator type filter is not installed between the fuel supply
tank and engine-mounted fuel system, any water in the fuel
will affect the fuel pump, engine filter, and injection
equipment. The owner/operator is responsible for making
certain the fuel reaching the engine's injection equipment is
free of impurities. This process is accomplished by installing
and maintaining a proper filtration/separation system.
FUEL FILTER!
WATER SEPARATOR
[Owner Installed]
FUEL INJECTION PUMP
The fuel injection pump is a very important component of the
diesel engine. requiring the utmost care in handling. The fuel
injection pump has been thoroughly bench-tested and the
owner-operator is cautioned not to attempt to service it. If it
requires servicing, remove it and take it to an authorized fuel
injection pump service facility. Do not attempt to disassemble
and repair it.
The only adjustment the servicing mechanic should make to the
fuel injection pump is the adjustment for engine idle speed.
FUEL LIFT PUMP
The fuel lift pump is an integral part of the fuel injection pump.
FUEL FILTERS
The fuel injection pump and the fuel injectors are precisely
manufactured and they must receive clean diesel fuel, free
from water and dirt. To ensure this flow of clean fuel, the fuel
must pass through at least two fuel filters. a fuel/water sepa-
rator and the engine's spin-on fuel filter. Visually inspect,
clean. and change these filters according to the maintenance
schedule in this manual.
A
WARNING:
Shut off the fuel valve at the tank
when servicing the fuel system. Take care in catching
any fuel that may spill. DO NOT allow any smoking,
open flames or other sources of fire near the fuel
system when servicing. Ensure proper ventilation exists
when servicing the fuel system.
TO LlFTPUMP
AND INCOMING
FUEL
TO INJECTION
PUMP
Changing the Fuel Filter
1.
Shut the fuel supply off.
LIGHTLY WIPE
WITH CLEAN FUEL
2. Loosen the fuel filter, turning counterclockwise with a
filter wrench. Place the used filter in a container for proper
disposal.
3. Using a rag, wipe clean the sealing face on the housing
bracket so the new filter can be seated properly.
4. Lightly oil the sealing O-ring on the new filter. To rein-
stall, turn the filter assembly counterclockwise carefully
until the O-ring contacts the sealing surface of the housing
bracket. Turn 2/3 further with the filter wrench.
NOTE:
The cartridge contains fuel. Take care not to spill it
during disassembly.
Engines & Generators
19