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Chapter 4
TYPICAL GASOLINE FUEL SYSTEM
In this section, a typical EPA approved domestic gasoline
fuel system with components is introduced. The fuel
system includes the fuel tank, fuel feed lines, fi ll and vent
fi ttings along with fuel fi lters, 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 become more
unstable and the product shelf life has been shortened.
As part of the Volvo product features the gasoline engine
EVC system and transmissions are all protected by a fault
handling system should a malfunction develop. A portion
of this fault system is used to monitor the gasoline fuel
system. Mercruiser propulsion systems offer “Smartcraft”
technology which delivers key engine functions.
Select codes warn the captain with a “buzzer” sound while
others will display on the helm tachometer, display, or
alarm panel. The “pop-up” will alternate between the cause
of the fault and a task to perform to aid in eliminating
the situation.
It is important to read and understand your Volvo or
MecCruiser propulsion owner’s manual in order to
react to a fault code should a malfunction display on
the instrumentation or an alarm sound.
Gasoline Requirements- Use nonleaded gasoline with the
following minimum octane rating:
• Inside United States-(R+M)2 (AK)- 87
• Outside United States- (RON) -90
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 gasoline blended with no more than 10% ethanol
and that meets the minimum octane specifi cation.
Do not use ethanol blends greater than 10% such as a newer
blend for select motor vehicles 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.
GASOLINE SPECIFICATIONS
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