PURSUIT OS 325 OFFSHORE, Owner'S Manual

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3-2
Section 3 Fuel System
OS 325
3.2 Fuel System
Gas Tank Valves
The fuel system on your Pursuit boat has
two fuel tanks and four manual “ON/OFF”
fuel valves. Refer to the Schematics section.
The fuel valves are located through the
hatch in the cockpit floor. The valves are off
when the handle is perpendicular to the fuel
flow. The fuel valves allow the operator to
run the engines from both tanks or from the
port tank or starboard tank. The starboard
fuel fill supplies the starboard tank and the
port fuel fill supplies the port tank.
During normal operation, the port tank
should supply the port engine and the star-
board tank should supply the starboard
engine. The fuel valves on each tank are
labeled port (red band) and starboard (green
band). The labels refer to the engine the
valve supplies. If a fuel supply problem
occurs in one of the fuel tanks, both engines
can be temporarily operated from either the
port or starboard fuel tank by opening both
valves on that tank. Operating the boat with
all four, fuel valves open, is not recom-
mended and should be avoided. The
engines will not draw fuel equally from the
fuel tanks when both engines are operating
from both tanks. Operating with all four fuel
valves open can cause one tank to be emp-
tied and the other tank is partially full, result-
ing in fuel supply problems.
The fuel delivery lines are equipped with
anti-siphon valves where the lines attach to
the fuel tanks. These valves help prevent
gasoline from siphoning out of the fuel tank
should a line rupture.
All boats equipped with gasoline engines are
required to have anti-siphon valves by the
U.S. Coast Guard.
DO NOT remove anti-siphon valves from
system. Anti-siphon valves prevent fuel from
flowing into bilge should a fuel hose or fitting
leak. If the valve becomes clogged, clean
and reinstall or replace it.
Fuel Tanks
The fuel pick-up tubes are positioned in the
tanks to achieve optimum fuel usage, fuel
line routing, etc. At certain speeds and hull
trim angles, the fuel supply at the withdrawal
tube can increase or decrease accordingly.
Be extremely careful when attempting to
operate the boat when low on fuel. Though
some fuel may be in the tank, the trim angle
of the boat may cause the fuel to flow away
from the pickup tubes.
Fuel Gauge Senders
The fuel gauge senders are more accurate
when the boat is stationary and level.
Because of the change in attitude when the
boat is underway, variations in gauge read-
ings can occur. This system is a relative indi-
cation of the available fuel supply and not a
calibrated instrument.
Fuel Fills
A fuel fill is located on each gunwale and is
marked “GAS.” The fuel fill is opened by
turning it counterclockwise. After fueling,
screw the cap on in a clockwise direction
until an audible click is heard indicating that
the cap is seated. If the cap is lost or dam-
aged replace only with original equipment.
During refueling the tank vents out at both
the fuel fill plate and the vent located on the
side of the hull. Note: There should not be
any residual fuel at the vent but there could
be residual fuel at the deck fill plate. Do not
block or restrict either of these vents.
NOTICE
First time fueling may require a slower
than normal flow due to the expansion
of the air in the tank. Subsequent fills
should allow for a normal flow rate.