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An.engine.that.is.not.developing.full.power.and.the.load.
carried.in.a.boat.will.directly.affect.performance.of.the.
engine..Always.be.sure.the.engine.is.properly.tuned.
and.load.conditions.are.those.normally.experienced,.
before.changing.propellers.
For.additional.information.on.factors.affecting.perfor-
mance,.please.consult.your.Four.Winns.dealer.
E - 5
RUNNING ANGLE & POWER
TRIM/TILT
Hull.planing.surfaces.have.the.least.amount.of.drag.
at a three to five degree angle with the water. This is
the.preferred.running.angle.when.boating..The.run-
ning angle has a significant impact on top speed and
handling..See.Figure.E2..Heavy.load.or.certain.water.
conditions may make it difficult to achieve the optimum
running.angle..The.running.angle.can.be.controlled.
through.the.use.of.the.power.trim..
A. Power Trim
Trim.angle.is.how.far.in.or.out,.the.drive.is.positioned..
in.relation.to.the.bottom.of.the.boat..The.trim.angle.of.
the.drive.has.a.distinct.affect.on.the.running.angle..
of.the.boat..
The.power.trim.system.permits.control.of.the.trim.angle.
of.the.drive.relative.to.the.boat,.at.the.touch.of.a.button..
It.allows.the.drive.to.be.raised.for.shallow.water.opera-
tion..Power.trim.also.allows.the.operator.to.adjust.the.
drive.while.underway.to.provide.the.ideal.running.angle.
for.a.given.load.and.water.condition..Additional.infor-
mation.can.be.found.in.the.engine.operator's.manual.
included.in.the.owner's.packet..
B. Power Tilt
Power.tilt.allows.the.operator.to.raise.and.lower.the.
drive.for.trailering,.launching,.and.beaching..Additional.
information.on.power.tilt.can.be.found.in.the.engine.
operator's.manual.included.in.the.owner's.packet.
NOTICE
DO NOT operate the motor with the water
intakes out of the water. Severe damage to the
engine systems can result. Consult the engine
operator's manual for specific information.
Engines and Instrumentation - Section E
Boat Properly Trimmed
Boat Too High - Trim Bow "Down"
Boat Too Low - Trim Bow "Up"
Figure E2: Running Angle
E - 6
TRIM TABS
Electric/hydraulic.trim.tabs.are.standard.on.the.310.
Horizon™ models. Trim tabs help provide maximum
control.of.the.hull.in.all.water.and.load.conditions..
Used.properly,.trim.tabs.can:.
a.. Compensate.for.wind.and.load.listing.(level.the.
boat.side.to.side).
b.. Induce.faster.planing.and.help.achieve.optimum.
running.angle.(see.Section.E5.-.Running.Angle.&.
Power.Trim/Tilt).
The.proper.use.of.electric/hydraulic.trim.tabs.requires.
a.basic.understanding.of.trim.tab.operation.and.some.
practice.in.calm.water..Be.sure.to.read.the.manufac-
turer's.literature.included.in.the.owner's.packet.
The.trim.tab.control.uses.two.(2).momentary-type.
rocker.switches...See.Figure.E3...The.trim.tab.switch-
es.control.the.attitude.or.position.of.the.boat...The.
trim tab switches are labeled for "Port" and "Stbd".
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Owner's Manual Page
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