Regal 53 SC Owner's Manual page 212

FUEL
The basic mode of the electronic controlled fuel system
regulates fuel delivery and timing. This system limits the
engine speed operating range, optimizes engine perfor-
mance while maintaining EPA and IMO MARPOL en-
gine emission guidelines.
Fuel Recommendations
Cummins Inc. recommends the ues of ASTM number 2
diesel which will provide maximum engine performance.
In colder climates where temperatures are below 32 de-
grees F or 0 degrees C a diesel blend of 2D and 1D will
provide acceptable performance. Lighter fuels can reduce
fuel economy.
The fuel viscosity must be kept above 1.3 cST at 40 de-
grees C (104 degrees F) to generate adequate pumping
and lubrication to all diesel fuel fuel components.
A Bosch HPCR pump with hardened components en-
sures most fuels will be delivered without jeopardizing
fuel quality safety.
The dual engine mounted secondary fuel fi lters require
changing fuel fi lters every 500 hours.
Read the owner's manual and perform all factory maintenance func-
tions on time and by authorized personnel.
Engine & Controls
WARNING
!
TO PREVENT AN EXPLOSION OR FIRE
DO NOT MIX GASOLINE, ALCOHOL, OR
GASOHOL WITH DIESEL FUEL.
CAUTION
!
AVOID FUEL SYSTEM COMPONENT
DAMAGE! DUE TO CLOSE TOLERANCES
OF DIESEL INJECTION SYSTEMS, IT
IS OF THE HIGHEST IMPORTANCE TO
KEEP FUEL CLEAN AND FREE OF DIRT
AND WATER. DIRT AND WATER IN THE FUEL
SYSTEM CAN CAUSE SEVERE DAMAGE TO
THE FUEL PUMP AND THE FUEL INJECTORS.
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