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LUBRICATION SYSTEM
Engine Oil
For the engine's lubrication, use a lubricating oil designated for gasoline service. Use a good grade of oil
having an API specification of SO or SE, preferably SF. DO NOT use oils designated OS.
Engine Oil Viscosity (SAE Number)
Use oil having a viscosity best suited to the atmospheric temperature. Refer to the oil viscosity chart below.
TEMPERATURE
ENGINE OIL
Oil Pressure
c"
F"
-30
-20
-10
o
10
20
30
-20
0
20
40
60
80
,':;~#'}~~'W$J!i:W,>i'J:·1 ~~~~-
.,*~~:-:
'''''"_'_ ' .
:':''R'Th~~~~'~:''
'-~-<>
,~-
-~~1'~~-
44m#¥tlw*!2:o#i@>
40
50
100
120
The engine's oil pressure is indicated by the oil pressure gauge (when equipped with one) or is monitored
by the standard oil pressure switch.
During normal operation, the engine's oil pressure will range between 35 and 55 psi (engine hot).
NOTE: A newly started, cold engine can have an oil pressure reading upwards of 60 to 60 psi.
A warmed engine can have an oil pressure reading as low as 35 psi. These readings may also
vary depending upon the load that is placed on the generator.
Your generator set is fitted with an oil pressure sensing switch as standard equipment. Should your engine's
oil pressure drop below a safe operating pressure, the sensor will shut the engine OFF to prevent any inter-
nal damage to your generator's engine from occurring by interrupting the DC voltage to the ignition coil.
Westerbeke Generators
54
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