Operator`s manual
GENERAL 
Introduction 
This manual contains the equipment operating procedures as well as additional information needed to help 
the operator keep the equipment in  proper working order.  Study and follow the instructions carefully.  A 
planned maintenance program is included in this manual; adhering 
to 
the program will result in better equip-
ment performance and 
longer equipment life.  Proper diagnosis of a problem 
is 
the most important step 
to 
satisfactory repair; therefore, a troubleshooting table 
is 
included. 
Understanding 
the 
Diesel 
Engine 
The diesel engine closely resembles the gasoline engine, since the mechanism 
is 
essentially the same.  The 
cylinders are arranged above a 
closed crankcase; the crankshaft 
is 
of 
the same general type 
as 
that 
of 
a 
gasoline engine; and the 
diesel engine has the same type of valves, camshaft, pistons, connecting rods, and 
lubricating system. 
Therefore, 
to 
a great extent, a diesel engine requires the same preventive maintenance as a gasoline engine. 
The most important factors are proper ventilation and proper maintenance 
of 
the fuel, lubricating and cool-
ing systems.  Replacement 
of 
fuel and lubricating filter elements at the time periods specified 
is 
a must, and 
frequent checking for contamination (that 
is, 
water, sediment,  or algae) in the fuel system is also essential. 
Another important factor is the use 
of 
the same brand of high detergent diesel lubricating oil designed specifi-
cally for diesel engines.  Be careful not 
to 
put gasoline in the diesel fuel tank(s).  Gasoline does not have the 
same lubricating 
qualities as diesel fuel; consequently, gasoline in the fuel lines will damage components in 
the 
fuel lift pump assembly, fuel injection pump and injectors. 
The 
diesel engine does differ from the gasoline engine, however, in its handling and firing 
of 
fuel.  The car-
buretor and ignition systems are done away with and in their 
place are 
two 
components - the fuel injection 
pump and the 
fuel injectors. 
Ordering Parts 
When contacting your Westerbeke 
dealer, parts distributor, or the factory concerning your Westerbeke unit, 
always provide the engine's model and serial number, and transmission number as they appear on the black 
and silver "Westerbeke" plate Which is mounted on the engine's exhaust manHold.  When ordering parts for 
your Westerbeke engine,  be sure 
to 
insist upon Westerbeke factory packaged parts,  because "will fit" 
or 
generic parts are frequently not made to the same specHications as original equipment. 
Note that component locations in the 
manual are referenced from the front of the engine which 
is 
the pul-
ley/drive belt end.  (The flywheel/transmission end 
is 
the rear end.)  Left and right sides are determined 
by 
the engine; imagine straddling the engine and facing 
in 
the same direction as the front 
of 
the engine: the left 
side 
is 
at your left, the right side is your right. 
Westerbeke engines and  generator sets 
afe thoroughly checked and given a final  run under various load 
conditions before leaving the factory.  Test running the engine ensures dependable operation, long service, 
and a satisfied owner. 
Care  at the factory during assembly,  and thorough testing,  have 
resulted  in a Westerbeke diesel  engine 
capable 
of 
many thousands of hours of dependable service.  However, the manufacturer cannot control the 
treatment the unit receives in the 
field. That part 
is 
up 
to 
the owner/operator. 
5 
Westerbeke Diesel 
Engines 










