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Quicksilver 505CAB — System & Component Overview and Operation
1. Fuel System
Your boat's petrol fuel system consists of a fuel tank, a fuel tank fill, a fuel tank vent fitting, an anti-
siphon valve, a sending unit, and an engine fuel supply line. In addition, there is a extra fuel port for
an optional pickup, if needed.
GASOLINE RECOMMENDATIONS
Minimum octane rating is 87AKI
Fuel System
Fuel deck plate
Fuel fill hose
Fuel vent hose
Fuel vent fitting
50L fuel tank
Fuel sender
Anti-siphon valve
Fuel distribution hose
Fuel bulkhead connector
Extra fuel port (plugged)
Fuel Tank
Your boat is equipped with a crosslink polyethylene fuel tank with a capacity of 50 liters. As a
precaution, all of the capacity may not be useable due to trim and loading conditions, so consider
keeping at a minimum 25% reserve fuel in the tank.
Fuel tanks with levels less than 25% capacity can cause engine stalling problems due to fuel starvation
or by allowing sediment and dirt to enter the fuel supply lines. Keep the tank full and monitor the fuel
level often to prevent this from happening.
Fuel Distribution
Fuel is delivered from the tank to the engine through the anti-siphon valve and the fuel line. The anti-
siphon valve is a safety feature designed to prevent fuel from siphoning out of the tank if the fuel line
was ever cut or broken below the level of the fuel in the tank. If the line ever broke, some fuel would
leak out from the line, however, the anti-siphon valve prevents the entire contents of the tank to
siphon into the boat.
NEVER REMOVE OR MODIFY THE ANTI-SIPHON VALVE FROM THE FUEL TANK.
Ethanol—Blended Fuels
Ethanol is an oxygenated hydrocarbon compound that has a high octane rating and therefore is useful
in increasing the octane level of unleaded gasoline. The fuel system components of your Mercury
engine(s) have been tested to perform with the maximum level of ethanol blended gasoline (10%
ethanol), currently allowed by the EPA in the United States.
The use of improper gasoline or additives can damage your
fuel system. Damages caused by improper gasoline or
additives will not be covered under warranty.
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