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FUEL SYSTEM MAINTENANCE
The fuel system pulls diesel fuel from the fuel tank, filters out water and other contaminants, then conveys
it to the engine for combustion. Unused fuel is returned to the fuel tank through a return line. To prevent
engine damage and excess wear, the use of proper fuels and proper fuel system maintenance is
required.
Fuel Pump
The fuel pump installed on the generator set from the factory is capable of supplying enough fuel to the
engine in a wide range of applications; however, installations with long fuel line runs and/or fuel tanks
located too far below the generator set may require the use of a secondary fuel pump (not provided).
Fuel Lines
The fuel lines connecting the generator set needs to be a high quality, diesel & oil resistant, multi-layer
rubber hose. The hoses should also be resistant to temperatures of at least 212° F (100° C).
To provide an adequate supply of fuel to the engine, the hoses need to be sized appropriately.
Supply Line Size Minimum 5/16” (8mm)
Return Line Size Minimum 3/16” (5mm)
Fuel Specifications
It is recommended to run a clean, high quality diesel fuel with a minimum cetane rating of 50 in the
generator set. The engine can operate on diesel fuels with a sulfur content up to 1.0% (10000 ppm);
however, when using high sulfur fuels, with a sulfur content between 0.50% (5000 ppm) and 1.0% (10000
ppm), the engine oil and oil filter change interval is halved. DO NOT operate the engine on fuels with a
sulfur rating greater than 1.0% (10000 ppm).
NOTICE: Always use diesel fuel. DO NOT use alternative fuels, such as bio-diesel or kerosene.
Damage to the engine may result. Damage caused by using improper fuels is not covered under
warranty.
NOTICE: The type of diesel fuel and sulfur content used MUST be compliant with all applicable
emissions requirements in the area in which the generator set will be operated.
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