Owner`s manual

2470 CENTER CONSOLE
3.4 Fuel System Maintenance
Periodically inspect all primer bulbs, connections, clamps and hoses for leakage and damage or
deterioration. Replace as necessary. Spray the valves, tank fuel gauge sender and ground
connections with a metal protector.
Frequently inspect and lubricate the fuel fill cap O-ring seal with petroleum jelly or silicone
grease. The O-ring seal prevents water from entering the fuel system through the fuel fill cap.
It should be immediately replaced if there is any sign of damage or deterioration.
Periodically, remove the fuel vent and clean corrosion and salt buildup from the vent screens.
The screens will prevent insects and other foreign matter from contaminating the fuel and fuel
system. The fuel vent should be replaced if the vents or screens are damaged or badly corroded.
Fuel vent screens that are clogged will prevent the fuel tank from venting properly and make
filling the stank difficult or cause fuel supply problems to the engines.
Be sure the screens are secure and that the fuel tank vent hose is properly routed and attached when
the vent is reinstalled or replaced. The fuel tank vent hose must be looped above the vent, secured
to the hull near the vent and securely attached to the vent hose fitting with two hose clamps.
Contaminated fuel may cause serious damage to your engines. The fuel filters must be checked
for water and other contamination frequently. The filter elements must be changed at least once
a season or more frequently depending on the type of engine and the quality of the fuel. The fuel
filters and primer bulbs are located in the stern and are accessed by opening the hatch near the
transom door.
The age of gasoline can affect engine performance. Chemical changes occur as the gasoline ages
that can cause deposits and varnish in the fuel system as well as reduce the octane rating of the
fuel. Severely degraded fuel can damage the engine and boat fuel tank and lines. Therefore, if
your boat is not being run enough to require at least one full tank of fresh fuel a month, a fuel
stabilizer should be added to the gasoline to protect the fuel from degradation. Your dealer or
the engine manufacturer can provide additional information on fuel degradation and fuel
stabilizers recommended for your engine.
Avoid using fuels with alcohol additives. Gasoline that is an alcohol blend will absorb moisture
from the air which can reach such concentrations that "phase separation" can occur whereby the
water and alcohol mixture becomes heavy enough to settle out of the gasoline to the bottom of
the tank. Since the fuel pick up tube is very near the bottom of the tank, phase separation can cause
the engine to run very poorly or not at all. This condition is more severe with methyl alcohol and
will worsen as the alcohol content increases. Water or a jelly like substance in the fuel filters is
an indication of phase separation from the use of alcohol blended fuels.
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