NEVER operate the propulsion engine while
everyone on-board is sleeping. Fatal carbon
monoxide poisoning can occur.
For.additional.information,.refer.to.Section.B-2.Carbon.
Monoxide.
Radius
E - 3
ENGINES
Consult.the.Engine.Owners.Manual.included.in.the.
owner’s.packet.for.additional.operation.and.mainte-
nance.information.
E - 4
PROPELLERS
Knowledge.of.the.propeller.is.most.easily.gained.
through.better.understanding.of.the.terminology.used.
to.refer.to.the.aspects.of.propeller.size.and..
performance.
NOTICE
Figure E-1: Propeller Pitch & Diameter
Never run with a damaged propeller. You can
damage the engine or drive unit. Keep a spare
propeller on board.
C. Prop Slip
When.traveling.through.water,.a.propeller.is.unable.
to get a complete bite because of the fluidity of water.
“Prop.slip”.is.usually.expressed.as.a.percent.of.the.
computed theoretical speed. Fifteen to twenty-five
percent.prop.slip.is.common.for.a.sport-type.boat.
operating.at.cruising.speed.
A. Diameter
Diameter.is.twice.the.distance.from.the.center.of..
the.prop.shaft.to.the.extreme.tip.of.a.propeller.blade..
Increasing.or.decreasing.propeller.size.will.have.a.
direct.bearing.on.the.RPMs.(revolutions.per.minute).an.
engine.will.develop..This.is.due.to.the.greater.amount.
of.propeller.blade.surface.in.contact.with.the.water..
See.Figure.E1.
Changing.either.diameter.(Rx2).or.pitch.will.have.
an.effect.on.engine.speed.and.prop.slip,.and.in.
turn,.directly.affect.the.performance.of.a.boat..The.
propeller(s).included.with.each.Four.Winns .boat.
®
B. Pitch
provide.the.best.general.performance.based.on.data.
obtained.from.on-the-water.testing.of.that.model..
Variations.in.load,.operating.conditions,.environ-
ment,.the.individual.engine.and.hull.performance.
may.necessitate.the.purchase.and.use.of.another.
propeller(s).
Pitch.is.a.measure.of.helix.angle,.or.angle.of.attack,.
of.the.rotating.blade..Pitch.is.easily.understood.if.one.
imagines.the.propeller.rotating.through.a.semisolid.
such.as.butter.or.jello..The.distance.the.propeller.will.
travel.in.one.revolution.is.called.“Pitch.”..Increasing.
or.decreasing.pitch.will.also.have.a.direct.bearing.on.
engine.RPMs.because.of.the.greater.bite.taken.by..
the.blade.with.each.rotation..See.Figure.E-1.
.
Under.your.normal.load.conditions.the.engine(s).
should.turn.within.the.maximum.RPM.range.when.
at.full.throttle..If.the.engine(s).exceeds.the.recom-
mended.RPM,.an.increase.in.pitch.and/or.diameter..
is.required..If.the.engine.RPM.is.too.low,.a.decrease.
in.pitch.and/or.diameter.is.required.
Engines and Instrumentation - Section E
Owner’s Manual Page
| Categories | Four Winns Manuals, Four Winns Vista Manuals, Outboard Marine Corporation Manuals |
|---|---|
| Tags | Four Winns Horizon 180, Four Winns Horizon 183, Four Winns Horizon 190, Four Winns Horizon 200, Four Winns Horizon 203, Four Winns Horizon 210, Four Winns Horizon 220, Four Winns Horizon 240, Four Winns Horizon 260 |
| Model Year | 2006, 2007, 2008 |
| Download File |
|
| Document Type | Owner's Manual |
| Language | English |
| Product Brand | Boats and Cruisers, Four Winns. For support contact your dealer at http://www.fourwinns.com/locate-dealer.aspx |
| Document File Type | |
| Publisher | fourwinns.com |
| Wikipedia's Page | Outboard Marine Corporation |
| Copyright | Attribution Non-commercial |
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