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K - 1
ENGINE COMPARTMENT
VENTILATION
All.Four.Winns
.stern.drive.models.are.equipped.with.
®
engine.compartment.ventilation..This.system.is.de-
signed.to.meet.or.exceed.the.requirements.(in.effect.
at.the.time.of.manufacture).of.the.U.S..Coast.Guard,.
the.National.Marine.Manufacturers.Association,.and.
the.American.Boat.and.Yacht.Council.
A. Natural Ventilation System
This.system.includes.air.intake.and.exhaust.com-
ponents..The.exhaust.ducting.reaches.to.the.lower.
bilge.area..This.provides.adequate.air.movement.
while.underway.and.during.bilge.blower.operation.
B. Forced Air Ventilation
All.Four.Winns
.models.are.equipped.with.an.electric.
®
bilge.blower..The.bilge.blower.provides.the.ventilation.
required.prior.to.starting.the.engines.and.while.at.idle..
See.Section.H.-.Electrical.Systems.for.blower.opera-
tion.instructions.
Gasoline vapors can explode resulting in injury
or death. Before starting the engine, check
the engine compartment bilge for gasoline or
vapors, and operate blower for four () min-
utes, and verify blower operation. Run blower
when vessel is operating below cruising speed.
ALWAYS operate the bilge blower while the
engines are at idle.
C. Engine Ventilation System Maintenance
Periodic.inspection.and.cleaning.of.the.ventilation.
ducts.is.necessary.to.ensure.adequate.air.circulation..
A.buildup.of.leaves,.twigs,.or.other.debris.can.se-
verely.reduce.ventilation..Be.sure.bilge.water.does.not.
accumulate.to.a.level.that.would.obstruct.the.ventila-
tion.ducts.
Blower.operation.can.be.tested.by.placing.a.hand.over.
the.vents..DO.NOT.rely.on.the.sound.of.the.blower..
Be.sure.a.substantial.amount.of.air.is.being.exhausted.
by.the.bilge.blower..Check.the.bilge.blower.system.
often,.preferably.before.each.cruise.
Should.blower.noise.and.vibration.be.excessive,.
loosening.the.bilge.blower.mounting.screws.and.then.
tightening.evenly.usually.reduces.noise.considerably.
Ventilation & Drainage Systems - Section K
Ventilation and Drainage Systems
K - 2
DAY BERTH & HEAD VENTILATION
The.Day.Berth.and.Head.compartment.are.equipped.
with.hatches.which.can.be.placed.in.the.open.posi-
tion.for.ventilation.purposes..The.Day.Berth.window.
also.slides.opens.to.provide.ventilation..See.Figure.
K1..The.side.windows.(portlights).may.be.opened.to.
provide.additional.ventilation.for.both.the.Day.Berth.
and.Head.compartment.areas.
Figure K1: Day Berth Window
Failure to properly ventilate the boat while the
engines or generator are operating may permit
carbon monoxide to accumulate inside the
accommodation (occupied) spaces. Refer to
Section E- - Engine Exhaust and Section B-
- Carbon Monoxide for additional information.
Be sure hatches are secured while underway.
Damage to the hatches may result.
K - 3 HULL DRAINAGE SYSTEMS
A. Transom Drain
A.transom.drain.with.plug.is.provided.in.the.engine.
compartment.to.allow.water.drainage..When.the.boat.
is.out.of.the.water,.the.boat.and.trailer.should.be.
positioned.so.any.bilge.water.accumulation.during.dry.
storage will flow towards the transom.
Be sure the drain plug is securely in place
prior to launching the boat. Upon shipment of
the boat, the drain plug is usually taped to the
steering wheel.
NOTICE
Owner's Manual Page
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