Owner’s Manual Page
Fuel Systems - Section I
Figure I-3: Fuel Sender Operation
Due.to.the.mechanical.nature.of.the.fuel.sender,..
variations.in.readings.during.various.speeds.of.
operation.may.occur..This.system.is.merely.a.relative.
indication.of.the.available.fuel.supply.and.not.a.
calibrated.instrument..With.this.type.of.sending.unit..
a.more.accurate.measurement.of.fuel.level.is.obtained.
with.the.boat.in.a.level.position.
The.gauge.readings.will.also.vary.with.the.trim.angle.
of.the.boat..When.sitting.at.a.dock.and.the.boat.is.
nearly.level,.the.fuel.gauge.will.register.accurately..
Refer.to.Figure.I-3..When.boating,.the.trim.angle.of.
the.boat.changes.and.affects.the.gauge.readings..
Under.these.conditions,.the.fuel.sender.will.register.
“full” for the first few hours of running time until the fuel
level.drops.below.the.3/4.or.1/2.mark..This.is.caused.
by.the.angle.of.the.fuel.in.the.tank.as.shown.in..
Figure.I-4..
Figure I-4: Effects of Trim Angle
It.is.very.important.to.keep.track.of.hours.and.fuel.
consumption.to.obtain.an.average.gallon.per.hour.
consumption figure. Refer to the fuel log located at
.
the.back.of.this.manual..This.will.help.to.prevent.any.
problems.with.running.out.of.fuel.on.the.water.
Dealers are equipped with some general figures on
consumption.which.can.be.used.as.a.guide.until.spe-
cific information on your boat is determined. Because
of.boating.conditions,.speed,.weight.and.other.factors.
common.to.your.situation,.fuel.consumption.will.vary.
between your boat and consumption figures devel
-
oped.by.Four.Winns..
C. Anti-Syphon Valves
The.fuel.withdrawal.line.is.equipped.with.an.anti-.
syphon.valve.where.the.line.attaches.to.the.fuel.tank..
This.valve.prevents.gasoline.from.syphoning.out.of.
the.fuel.tank.should.a.line.rupture..See.Figure.I-2.for.
anti-syphon.location.
Figure I-2: Fuel Tank Fittings
The fuel withdrawals are positioned in the fuel
tanks to achieve optimum fuel usage, and fuel
line routing. At certain speeds and hull trim
angles, the fuel supply at the withdrawal tank
location can increase or decrease accord-
ingly. Be extremely careful when attempting to
operate the boat on a minimum amount of fuel.
Though some fuel may be in the tank, the rela-
tive trim angle of the boat may cause the fuel
to flow away from the withdrawal.
NOTICE
Access plates or lids are provided in the floor
for easier access to the fuel pick-up, anti-sy-
phon valve and sender.
D. Fuel Gauge
The.fuel.gauge.indicates.the.amount.of.fuel.in.the.
tank..See.Section.E-6F.-.Fuel.Gauge.(4-in-1-Gauge).
for.additional.information.on.fuel.gauge.use.
E. Fuel Senders
The fuel sender consists of a float which travels up
and down a stationary tube. The float measures the
level.of.the.fuel.in.the.tank.and.sends.a.signal.to.the.
fuel.gauge..See.Figure.I-3..
Summary of Contents for FUNSHIP
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