PURSUIT DENALI 24, Owner'S Manual

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Denali 24
3.4 Fuel System Maintenance
Periodically inspect all connections, clamps and hoses for leakage and damage or deterioration.
Replace as necessary. Spray the valves, fuel gauge sender and ground connections with a lubricant/
protector.
Frequently inspect and lubricate the fuel fill cap O-ring seal with petroleum jelly. The O-ring seal
prevents water from entering the fuel system through the fuel fill cap and it should be immediately
replaced if there is any sign of damage or deterioration.
Periodically, remove the covers from the fuel vents and clean the vent of any debris. Be sure the
covers are replaced securely after cleaning. The covers help prevent water and other foreign matter
from contaminating the fuel and fuel system. If a vent cover is damaged or lost it should be replaced
as soon as possible.
Contaminated fuel may cause serious damage to your engine. The filter must be serviced
frequently. The filter element must be changed at least once a season or more frequently depending
on the type of engine and the quality of the fuel. Please refer to the engine or fuel filter
manufacturer’s instructions for information on servicing and replacing the fuel filter element.
The age of gasoline can effect 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 recom-
mended 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 are
an indication of possible phase separation from the use of alcohol blended fuels.
DO NOT DRAIN ANY FUEL IN THE BILGE. THIS COULD LEAD TO A FIRE OR EXPLO-
SION.
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