2023 OWNER’S MANUAL
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Troubleshooting the Fuel System
Fuel Pump Does Not Run When The Engine Start-Stop Button
Is Pressed
Cause 1: Pump may not be receiving sucient voltage to the pump,
or there may be corrosion interfering with the electrical impulse.
Remedy 1: Take the boat to an authorized MasterCraft dealer.
Only the dealer has the specialized, required tools to correct the
problem.
Cause 2: The fuel pump relay may have tripped.
Remedy 2: Reset the relay on the EPDM screen on the dash.
The Sound Of The Fuel Pump Running Is Audible But The Engine
Does Not Start
Cause: The system may have inadequate fuel pressure or clogged
fuel filter and/or lines.
Remedy: Take the boat to an authorized MasterCraft dealer.
There are a variety of potential causes that can negatively impact
fuel pressure. All repairs require specialized tools available only
to dealers.
GASOLINE
Additional, critical information regarding the proper use of
gasoline in relation to the ILMOR Marine Engine is contained
In the engine Owner’s Manual, such as:
• Avoiding oxygenated fuels or fuels with alcohol.
• What to do when the boast is not used for long periods of time.
• Fueling outside the United States and Canada.
Damage to the engine by use of low-quality gasoline or gasoline
with an octane below the minimum level listed for Ilmor engines will
void the warranty on the engine, Extended storage with fuel in the
system can aect fuel stability and may require system inspection
and fuel filter replacement when the boat returns to service.
Engine Required
Fuel
Octane
6.0L 87
5.3L 87
6.2L 90
6.2L 93
Damage to the engine by use of low-quality
gasoline or gasoline with an octane rating
below the minimum level listed for ILMOR
MV8 engines will void the warranty on the
engine. Extended storage with fuel in the
system can affect fuel stability and may
require system inspection and fuel filter
replacement when the boat returns
to service.
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