Fuel Requirements; Gasoline Requirements; Gasoline Containing Alcohol - PCM HO303 MPI Owner's Operation And Maintenance Manual

GASOLINE REQUIREMENTS

CAUTION
Fire and Explosion Hazard - Gasoline is extremely
fl ammable and highly explosive, and , if ignited,
can cause serious bodily injury or death. Careful
inspection of the entire fuel system including, but
not limited to, fuel tanks, fuel lines, fuel fi lters and
all fi ttings is mandatory, especially after periods
of storage. Replace any component that shows
signs of leakage, corrosion, deterioration, swelling,
hardening or softening.
WARRANTY NOTICE: Damage caused to the engine
through the use of improper gasoline, low-quality or
gasoline with an octane rating below the minimum
requirements listed below, is considered misuse of
the engine. Such damage is not covered by the PCM
Marine Engines warranty.
The ignition timing set by the factory requires the use
of a high-quality lead-free regular gasoline with the
following minimum octane specifi cation.
Pump Octane Number (R+M/2) (PUMP) - 87
$
MINIMUM OCTANE RATING
E10
Figure 9-1 Fuel Requirements
NOTICE: PCM Fuel Injected engines are calibrated
to operate on and provide optimum performance when
using fuel with at least an 87 octane fuel rating. PCM's
engine control module incorporates Adaptive Learn
Technology to ensure optimum engine performance is
obtained when using fuel rated higer than 87 octane.
If a slight pinging is heard during acceleration and the
proper octane fuel is being used, it is considered normal.
If a constant, heavy knock occurs, the engine should be
evaluated by a PCM Marine Engines Premier service
technician.
ATTENTION: For optimal performance and reliability,
the ZR450 application requires the use of premium
93 Octane fuel.
R + M/2 METHOD
87

FUEL REQUIREMENTS - 9

GASOLINE CONTAINING ALCOHOL

The implementation of ethanol-based fuel is spreading
rapidly throughout the United States. As such, PCM
Engines provides the following information regarding the
use of this fuel.
This information addresses the use of ethanol fuels in
PCM ENGINES ONLY. It does not address the use of
ethanol fuels in vessel related components such as boat
gas tanks, boat fuel lines, etc.
Ethanol blended fuel rated E10 or less is acceptable
to use. Fuels rated higher than E10 SHOULD NOT
BE USED. Ethanol fuels rated higher than E10 could
potentially damage the engine and/or present an
unsafe boating condition. Damage to the engine
resulting from the use of ethanol fuel rated higher
than E10 IS NOT covered by the warranty.
Do Not use any gasoline that contains
METHANOL. This fuel is very corrosive and will
create unsafe operating conditions. Serious
damage will result from the continued use of fuel
containing METHANOL. Any resulting engine
damage will not be covered by the warranty.
If ethanol blended fuel rated E10 or less is used, or
if the presence of alcohol is uncertain, more frequent
inspections and service of the complete fuel system are
required. Any sign of fuel leakage or deterioration must
be repaired immediately before further engine operation.
It is important to note that ethanol blended fuel will act
as a solvent and will attract and hold moisture. Without
proper fuel stabilization and fuel fi ltration, ethanol
blended fuel may cause the following:
• Excessive moisture (water) may cause lean
operation to include hard starting and operating
diffi culties such as, vapor lock, low speed
stalling, and shortened fuel shelf life.
• Acting as a solvent, ethanol blended fuel may
cause gum, sediment, sludge, and other particles
to be loosened and carried through the fuel
system to the engine.
Fuel system or engine damage caused by
contamination from water, foreign particles, sludge,
or gums entering or forming in the fuel system is not
covered by the PCM Limited Warranty.
Fuel Stabilizer Recommendations for Ethanol
Blend Fuel
The use of a commercially available fuel stabilizer, such
as STA-BIL®, is recommended at each fi ll-up or when
storing ethanol-blended fuel for more than 2 weeks.
L510010-11
CAUTION
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