unit.out.too.far,.your.boat.will.porpoise.or.the.propel-
ler.will.cavitate,.and.the.bow.will.slam.up.and.down.
on.the.water..Your.boat.is.trimmed.correctly.when.it.is.
just.short.of.porpoising.or.propeller.cavitation,.under.
ideal.running.conditions..
2... The.switch.controls.the.position.of.the.stern.drive...
Proper.trim.is.very.important.in.boating..
3... In.the.case.of.low.or.heavy.bow.attitude,.the..
boat tends to “plow” (Figure S3. The lower unit is
trimmed.too.far.under.or.forward..Trim.the.unit.UP.
(out).to.correct.this.situation..
Trim.your.boat.to.compensate.for.seas,.winds,..
or.uneven.loads..
4.
If the bow is too high, the boat tends to “porpoise”
(Figure.S5)..The.drive.unit.is.trimmed.up.or.out.too.
far..Trim.DN.(in).to.correct..
Head.Seas
Trim.drives.in.more.than.
usual..Use.tabs.to.keep.
bow.down.and.move.at..
a.slower.speed.
5...
A.good.practice.is.to.get.underway.(especially..
when.fully.loaded.or.pulling.a.skier).with.the.unit.
trimmed.all.the.way.DN.(under)..After.the.boat.is.
on.plane,.adjust.the.trim.out.slightly.to.obtain.the.
proper.bow.attitude.and.engine.speed..
Following.Seas
To.prevent.taking.sea-.
water.over.the.bow,.trim.
drives.out.and.keep.tabs.
up.to.keep.bow.up..
Listing.Due.to.Quar-
tering.Seas,.Beam.
Wind,.or.Uneven.Load starboard,.press.port.bow.
down.switch..If.listing.to.
Use.tabs.independently.to.
adjust.for.list..If.listing.to.
6...
Trim.also.affects.propeller.selection.and.fuel.ef-.
ficiency. All models should be “propped” to be in
the.upper.half.of.the.maximum.rpm.range.with.the.
boat.lightly.loaded.and.the.drive.trimmed.up.to.
maximum..
port,.press.starboard.bow.
down.switch.
This configuration allows the engine to operate
within.the.recommended.rpm.range.with.a.heavy.
load..
Remember.that.most.boats.react.very.slowly.to.trim.
tabs..Often.boat.owners.do.not.give.trim.tabs.time.to.
work..Press.the.trim.tab.switches.for.only.one.second.
at.a.time.and.then.allow.some.time.for.the.boat.to.
react..If.the.boat.is.still.listing.after.a.minute.or.two,.
press.the.trim.tab.switch.again.for.a.one.second.inter-
val..The.labels.on.the.trim.tab.switches.indicate.what.
you.want.your.boat.to.do,.not.what.you.want.the.tabs.
to.do..
.
The.power.unit.should.never.be.trimmed.up.to..
a.point.where.the.propeller.cavitates.(or.slips)..
A.rapid.increase.in.engine.rpm’s.is.evidence.of.
cavitation..If.this.occurs.accidentally.while.running.
at.full.throttle,.immediately.lower.the.drive.trim.and.
reduce.the.throttle.until.the.slipping.stops..If.nec-
essary,.have.your.dealer.reset.the.trim.limit.switch.
(if.provided).to.avoid.over-trimming.in.the.future..
It.is.a.good.idea.to.take.your.boat.out.onto.open.water.
shortly.after.you.get.it.and.experiment.with.the.trim.
tabs..After.you.get.your.boat.onto.plane,.set.the.tabs.
in.various.positions.and.note.how.your.boat.reacts..
This.will.give.you.a.feel.for.how.the.trim.tabs.work..
.
If.the.prop.slips.at.lower.planing.speeds,.the.drive..
may.be.trimmed.too.high..Immediately.lower.the.
drive.unit.until.the.prop.grabs.again.to.restore.ef-
ficiency.
It.is.possible.to.extend.the.cylinder.life.expectancy.on.
your.trim.tabs..To.do.this,.keep.the.cylinders.retracted. 7... .Trimming.out,.in.addition.to.raising.the.bow,.also.
while.at.dockside..Press.both.trim.tab.controls.down.
until.tabs.reach.their.full.up.position..
lifts.the.boat.higher,.gaining.speed.because.less.
hull.is.in.the.water..
B. Tilt/Trim Control Switches
8... The.trailering.position.of.some.stern.drives.is..
controlled.by.a.separate.switch.on.the.dash.switch.
panel.or.throttle/shift.control..Do.not.activate.this.
switch.while.engine.is.running..Doing.so.can.se-
verely.damage.the.lower.unit.and.engine..
NOTE:.Trim.refers.to.the.angle.of.the.lower.unit.in.
relation.to.the.bottom.of.the.boat..With.respect.to.trim-
ming,.the.words.in,.down,.under,.and.forward,.have.
the.same.meaning.as.do.up,.out,.and.aft..
NOTE:.Refer.to.the.control.instructions.regarding.the.
power.trim.controls.installed.on.your.boat..
1... .The.standard.trim.control.switch.is.located.on.the.
control.lever.handle..
Prelaunch & Underway - Section S
Owner’s Manual Page
| Categories | Four Winns Manuals, Four Winns Vista Manuals, Outboard Marine Corporation Manuals |
|---|---|
| Tags | Four Winns Horizon 310 |
| Model Year | 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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