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 Funship Manuals, Four Winns Manuals, Outboard Marine Corporation Manuals |
|---|---|
| Tags | Four Winns Funship 194, Four Winns Funship 204, Four Winns Funship 214, Four Winns Funship 224, Four Winns Funship 234, Four Winns Funship 244, Four Winns Funship 264, Four Winns Funship 274 |
| 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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