Owner`s manual

System Description/Checks
Engine Systems
Fuel
On a diesel engine one of the most misunderstood systems is the fuel system. Consisting
of two major and several minor parts the fuel system is generally the most neglected.
When fuel leaves the tank it is pulled toward the engine by a primary fuel pump and then
forced under pressure through the secondary filter to the injection pump. The injection
pump pressurizes the fuel and sends it to the injector. This event is timed to perfection
with the rising of the piston on the power stroke so the fuel sprays at an exact moment
during the pistons travel to the top. The atomized fuel mixes with the superheated air
charge and the combustion event takes place.
On a regular basis, every engine owner needs to perform a visual check of the fuel
system. Looking for minor fuel leaks, bent tubing, or corrosion one can correct a small
problem before it becomes a serious problem. However, do not limit your visual check to
the engine. Check the system all the way to the tank, even the fuel fill tube, tank vent
system, all clamps and hoses.
All Westerbeke engines are equipped with at least one secondary fuel filter. This is
located in a small bowl mounted to the engine. Engines that are several years old, and
use the round electrical fuel pump, also have a filter mounted in the bottom of the pump
housing. These need to be changed as often as your large primary fuel filter is changed.
Remember the two biggest enemies of your fuel system are dirt and water. If you take
the inexpensive step to prevent these it will save a lot more down the road.