Propellers; Diameter; Pitch; E.-.5. Propellers - Four winns 348 vista Owner's Manual

Coupling Alignment Procedure:
1.. Boat.must.be.in.water.for.at.least.24.hours..
before.alignment.is.started.
2.. Check.to.be.sure.that.the.shaft.can.be.turned..
with.one.hand.on.the.coupling.
3.. Assure.that.all.shaft.coupling.nuts.and.bolts..
are.installed.but.loose.
4.. Separate.coupling.face.from.transmission..
output flange.
5.. Using.a.set.of.feeler.gauges,.measure.the.gap.
between.the.coupling.face.and.the.transmission.
output.face,.next.to.each.bolt,.without.rotating..
the.shaft..
6.. Subtract.the.smallest.measurement.from.the.
largest.
A. I f the difference is .004" or less, snug up
each.nut.and.bolt,.then.tighten.each.nut.to.
10.to.15.ft.-lbs.of.torque,.then.retighten.
each.nut.to.30.to.35.ft.-lbs..of.torque.
.
B. I f the difference is greater than .004",
adjust.engine.and.transmission.mounts.up..
or.down,.sideways.and/or.fore.and.aft.until..
the.difference.between.the.highest.of.the.
measurements and lowest is .004" or less.
Snug.up.each.nut.and.bolt,.then.tighten.
each.nut.to.10.to.15.ft.-lbs.of.torque,.then.
retighten.each.nut.to.30.to.35.ft.-lbs..of.
torque..
7.. Check.to.be.sure.that.the.shaft.can.be.turned.with.
one.hand.on.the.coupling.
8.. If.the.shaft.can.not.be.turned.with.one.hand.on..
the.coupling,.readjust.the.engine.and.transmission.
mounts.up.and.down,.sideways,.and/or.fore.and.
aft.until.the.difference.between.the.highest.of.the.
measurements and lowest is .004" or less. Snug
up.each.nut.and.bolt,.then.tightening.each.nut.to.
10.to.15.ft.-.lbs..of.torque,.then.retightening.each.
nut.to.30.to.35.ft.-lbs.of.torque..Be.sure.the.shaft.
can.be.turned.with.one.hand.on.the.coupling.
9.. Repeat.this.procedure.on.the.other.side..
Engines, Drives and Instrumentation - Section E
E - 5

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..It.should.be.noted.the.Vista
models.are.equipped.with.nibral.propellers.and.most.
stern.drive.Vista .models.include.stainless.steel.
®
propellers.
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.RPM's.an.engine.will.develop..
This.is.due.to.the.greater.amount.of.propeller.blade.
surface.in.contact.with.the.water..See.Figure.E-5.
Figure E-5: Propeller Pitch & Diameter
B. Pitch
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.gelatin..The.distance.the.propeller.
will travel in one revolution is called "Pitch." Increasing
or.decreasing.pitch.will.also.have.a.direct.bearing.on.
engine.RPM's.because.of.the.greater.bite.taken.by.
the.blade.with.each.rotation..See.Figure.E-5.
.inboard.
®
Owner's Manual Page