Systems and Components
4-3
Owner’s/Operator’s Manual
NOTE:
DO NOT use gasoline containing an octane-enhancing additive called
methylcyclopentadlenyl manganese tricarbonyl (MMT). These fuels can
reduce spark plug life and can also affect engine performance.
Fuel Fill/Vent Plate
The fuel fill/vent plate on all CROWNLINE models is labeled “GAS” or “DIESEL.”
Make sure to use the correct fuel type for your CROWNLINE.
The air vent allows the air in the fuel tank to be displaced by the fuel as it enters and
is consumed from the tank.
Anti-Siphon Valve (Gasoline Engines Only)
The fuel withdrawal line is equipped with an anti-siphon valve where the line attaches
to the fuel tank. The anti-siphon valve prevents gasoline from siphoning out of the
fuel tank in the event of a fuel line rupture.
Fuel Filter
Fuel filters supplied by engine manufacturers are installed on or near the engine. The
filters should be replaced frequently to maintain an adequate supply and delivery of
clean fuel to the engine. Refer to your Engine Operation and Maintenance Manual.
ELECTRICAL SYSTEMS
12-Volt DC System
The 12-volt DC system is powered by a battery or batteries when there is more than
one battery. Batteries are charged through the engine-driven alternator and/or
(optional) battery charger. A voltage gauge, located at the helm, shows the charge
level of the battery(ies). The DC circuit breakers protect the labeled circuit, which, in
turn, delivers the 12-volt DC power to operate on-board 12-volt equipment. Most
receptacle circuits are capable of handling 15 Amps.
The negative terminal of the battery is connected to the engine grounding stud. This
is the approved negative ground setup for marine DC electrical systems. Any
additional equipment must be adapted to this negative ground system. Additional
equipment must be supplied with over-current protection. See your CROWNLINE
dealer about additional DC power requirements.
NOTE:
DO NOT make any connections for power from the voltage gauge
terminals.
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