Owner`s manual

3-4
Section 3 Fuel System
OS 255
Spray the valves, fuel tank gauge sender
and ground connections with a metal protec-
tor such as silicon spray.
Frequently inspect and lubricate the fuel fill
cap o-ring seals with petroleum jelly or sili-
cone grease. The o-ring seal prevents water
from entering the fuel system through the
fuel-fill cap. Replace immediately if any
damage or deterioration is apparent.
The age of gasoline can affect engine per-
formance. Chemical changes occur as the
gasoline ages that can cause deposits and
varnish the fuel system, as well as reduce
the octane rating of the fuel. Severely
degraded fuel can damage the engine, fuel
tank, and lines. Therefore, if you do not run
your boat enough to require at least one full
tank of fresh fuel a month, add a fuel stabi-
lizer to the gasoline to prevent fuel degrada-
tion.
Do not allow the boat to sit for an extended
period with the fuel tanks less than full.
Changes in temperature and weather can
cause condensation in fuel tanks that are
less than 3/4 full. Your dealer or the engine
manufacturer can provide additional infor-
mation on fuel degradation and fuel stabiliz-
ers recommended for your engine.
Improper marina fuel storage techniques,
limited boat usage, etc. can cause the fuel to
become contaminated. It may be necessary
to periodically pump accumulated water and
contaminated fuel from the bottom of the fuel
tanks. If the fuel system on your boat
becomes contaminated, contact your dealer
or marina for assistance.
Avoid using fuels with alcohol additives.
Gasoline/alcohol blends absorb moisture
from the air, which can cause "phase sepa-
ration". When this happens, the water and
alcohol mixture becomes heavy enough to
settle to the bottom of the tank. Since the
fuel pick up tube is near the bottom of the
tank, phase separation can cause the
engine to run very poorly or not at all.
Methyl-alcohol gasoline mixtures are even
worse as the alcohol content is greater.
Water or a jelly like substance in the fuel fil-
ters is an indication of phase separation
from the using alcohol blended fuels.
Diesel engine operation requires clean and
dry diesel fuel. Algae can grow in the accu-
mulated water in a diesel fuel tank. This con-
dition is prevalent in warmer climates.
Periodically adding a high-quality diesel fuel
additive containing an algicide may be
required to control algae in your area.
Please contact your Pursuit dealer or engine
manufacturer for additional information
regarding fuels and additives.
! WARNING
After changing the filter element,
prime the fuel system and check all fit-
tings for leaks before and after start-
ing the engines.