MasterCraft boats are equipped with a highly innovative fuel system. This system is
designed to provide years of trouble-free service. Some of the latest innovations related to fuel
handling safety are also incorporated into the fuel delivery system.
Thefuelpumpsysteminyourboatwasspecicallydesignedforthemarineenvironment
and contains a number of added safety components that are unique to the marine environ-
ment. Because of the special nature of the design, there are no user-serviceable parts. Any
parts in need of service or maintenance will need to be addressed by an authorized Master-
Craft dealer. An authorized MasterCraft dealer is equipped with the special tools necessary to
disassemble and service the fuel capsule and associated parts. Replacement parts must meet
OEMrequirementsasspeciedbyMasterCraft.
The fuel line in the boat’s bilge area that goes from the tank to the engine is a special
multi-layer armored line that is covered with a special material known as a fire sleeve. The
fire sleeve affords protection to the fuel line in the unlikely event of a boat fire. The sleeve
iscoloredorangeforeasyidenticationofthefuelline.
Using Care
When Fueling
Gasoline is extremely flammable and highly explosive
under certain conditions. Always stop the engine and
never smoke or allow open flames or sparks within fifty
(50) feet of the fueling area when fueling.
Take care not to spill gasoline. If gasoline is spilled ac-
cidentally, wipe up all traces of it with dry rags immedi-
ately and dispose of properly on shore.
Gasoline is explosive. If a gasoline odor is present or
gasoline is visually observed in the bilge area during in-
spection, DO NOT START YOUR ENGINE! Remove
the ignition key from the ignition switch and call an au-
thorized MasterCraft dealer for service.
Allowing the fuel level in the fuel tank to fall below one-
quarter of a tank full may affect the reliability of the
fuel pump or result in damage to the fuel pump, which
is not covered under warranty.
ILMOR MARINE Engines
What Type of Gasoline To Use
The ILMOR MV8 engine (5.7, 6.0 and 6.2L) requires a minimum of 87 oc-
tane fuel. The octane number is based on the pump octane number, which is
(R + M)/2, where R is the research octane number and M is the motored octane
number.
For better performance, 93 octane fuel is recommended.
Fuelsotherthan specied will negatively alterperformance,emissions
and could damage the engine. Use of lower octane fuels will cause spark knock
(pinging). Continued heavy spark knock can cause severe engine damage. The
engineshaveknockdetectionsystemsthatoerthebestengineperformance
by controlling knock through precise ignition timing. The higher octane fuel
will cause less knock for the ignition system to process and adjust for.
Duringrefuelingyoushouldreasonablyexpecttonothaveanyfuelspitbackorwellbackwhenusinganautomaticshut-ofuelpumpnozzle.All
land-basedgasstationsarerequiredtousethese;somemarinasmaynot.Therefore,werecommendthatyouneverleavethefuelllunattended
when gassing up.
AlimitednumberofMasterCraftboatmodelsareequippedwithadierenttypeoffuelllcapfromtraditionalcaps.As shown below, these caps
are hinged, and they snap open or closed to seal with an audible click. This is important for the system on these boat to operate correctly.
MasterCraft recommends daily inspection of the bilge for foreign materials and the possibility of gas or oil leakage detection. As part of your
dailyinspection,includeavisualcheckoftheorangere-sleevedfuelline.Ifyouseedamagetothesleeveorlineorinanywaysuspectdamageor
fuel leakage, DO NOT START THE BOAT! Immediately call an authorized MasterCraft servicing dealer and let him or her assess the situation. Even if
the outing is canceled, leaking fuel can cause serious damage to the environment and may be a potentially hazardous situation for people and prop-
erty in the area. Therefore, it is critical to attend to any indication
that there is fuel line damage or fuel leakage as soon as possible.
MasterCraft 2012 Owners Manual • Preparation • Page 3-2
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