Regal LS4C Owner's Manual page 66

Gasoline Fuel System
In this section, a typical EPA approved domestic
gasoline fuel system is introduced. The fuel system
includes the fuel tank, fuel feed lines, fill and vent
fittings along with fuel filters, emission devices,
natural and powered ventilation systems.
Gasoline today is processed in a different manner
than it was a few years ago. As a result it has be-
come more unstable and the product shelf life has
been shortened.
Stern drive engines in this size range normally uti-
lize a metal fuel tank. A special EPA approved low
permeability hose system is used as required to
supply the engine.
Read and understand the stern drive engine own-
er's manual fuel section and safety information be-
fore attempting to use the vessel.
Note that due to a possible fire or explosion danger
never store flammable liquids and/or portable fuel
tanks in any storage compartment.
Gasoline Specifications/Octane Ratings:
Gasoline Requirements- Use premium non-leaded
gasoline with the following minimum octane rating
for stern drive engines:
• Minimum pump octane number 87 AKI.
The use of leaded fuels will damage the catalysts
and can not be used with catalytic converters.
Gasoline in the United States and other areas is
blended with 10% ethanol and is known as E-10
at the pumps. Marine engines used in your Regal
boat may be operated with premium unleaded
gasoline blended with no more than 10% ethanol
and that meets the minimum octane specification.
Do not use ethanol blends greater than 10%
such as a newer blend for select motor ve-
hicles called E-15. Your marine engine may be
damaged by more than 10% ethanol. A loss of
performance may occur and the engine will not be
covered by the engine manufacturer's warranty.
Refer to your stern drive engine manufacturer's op-
eration manual for additional information regarding
fuel information for your engine model.
As an option contact your engine manufacturer's
hot line or text on web with fuel related questions.
Also, additional fuel system information may be as
close as your Regal dealer. Your Regal dealer has
special training on the propulsion and Regal vessel
systems.
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