Induced.planning.&.Controlling.trim.angle; Trim.tab.maintenance; Engine.instrumentation - Four winns 348 vista Owner's Manual

Pressing.the.lower.starboard.trim.tab.switch.will.cause.
the.port.trim.tab.to.move.upward.and.will.result.in.the.
starboard.bow.being.allowed.to.rise.
Pressing.the.upper.port.trim.tab.switch.will.cause.the.
starboard.trim.tab.to.move.downward.and.will.force.
the.port.bow.downward.
Pressing.the.upper.starboard.trim.tab.switch.will.
cause.the.port.trim.tab.to.move.downward.and.will.
force.the.starboard.bow.downward..
Always.establish.your.intended.heading.and.attain.
desired.cruising.speed.before.trying.to.adjust.running.
attitude.(using.the.trim.tabs).
Always press the trim tab switches in short one
() second bursts. If pressed too long, you can
overcompensate, and potentially lose control.
DO NOT try to correct the situation by pressing
the other upper trim tab switch. Instead, raise
the tab slightly by pressing the appropriate
lower half of the trim tab switch.
After.stabilization.of.speed.and.direction,.press.the.
upper.half.of.the.appropriate.trim.tab.switch.to.achieve.
a.level.side.to.side.running.attitude..Be.sure.to.press.
the.correct.trim.tab.switch.to.obtain.the.desired.result.
After.pressing.a.trim.tab.switch,.always.wait.and.allow.
time.for.the.change.in.trim.tab.position.to.take.effect..
DO.NOT.continue.to.press.the.trim.tab.switch.while.
awaiting.trim.tab.reaction..By.the.time.the.effect.is.
noted,.the.trim.tab.will.move.too.far.and.thus.overcom-
pensate.
B. Induce Planing & Controlling Trim Angle
Trim.tabs.can.also.be.used.to.facilitate.faster.planing.
and.allow.better.control.of.the.running.angle.
Before.accelerating.and.trying.to.gain.plane,.press.
both.upper.trim.tab.switches..This.will.cause.both.trim.
tabs.to.move.downward.and.force.the.bow.down.
when.running..This.can.also.be.used.when.running.
the.boat.with.a.heavy.load.aboard.
Moving.the.trim.tabs.downward.will.increase.the.lift.
and.the.boat.will.achieve.plane.faster,.or.stay.on.plane.
at.a.lower.engine.and.boat.speed.
Engines, Drives and Instrumentation - Section E
After.gaining.plane.and.establishing.cruising.speed,.
pressing.both.lower.trim.tab.switches.will.cause.both.
trim.tabs.to.move.upward.and.will.allow.the.bow.to.
rise..This.should.be.used.to.adjust.the.running.attitude.
of.the.boat.to.decrease.the.drag.at.cruising.speed.or.
above,.or.when.running.in.a.following.sea.
When.running.at.an.engine.speed.that.results.in.the.
boat.falling.off.plane.or.causes.the.boat.to.plane.
inefficiently, lowering both tabs slightly (bow down) .
will.improve.the.running.angle.and.improve.operating.
efficiency.
Optimum efficiency is obtained when operating at a 3
to.5.degree.running.angle..Utilizing.too.much."Bow.
Down" trim tab can reduce operating efficiency and
cause substantial steering and handling difficulties. .
Be.extremely.careful.when.running.in.a.following.sea..
The effect of trim tabs is amplified under such condi-
tions. Steering and handling difficulties can result from
improper.trim.tab.usage,.especially.in.a.following.sea..
If.unsure.of.proper.trim.tab.positioning,.raise.the.trim.
tabs.to.the.full-up.position.
When.running.at.high.engine.speeds,.be.sure.
the.trim.tabs.are.in.the.full.up.position..Trim.tab.
action.should.be.only.enough.to.compensate.
for.any.listing..Trim.tab.adjustments.at.high.
speeds.are.extremely.critical..Be.prepared.to.
slow down should handling difficulties arise.
When.running.in.a.displacement.(very.slow.speed).
mode, better efficiency will be obtained with the trim
tabs.in.the.full-up.position.
C. Trim Tab Maintenance
Check the fluid level of the trim tab reservoir often.
Always keep the fluid level between the designated
marks.on.the.trim.tab.pump-reservoir..Refer.to.the.
manufacturers information for specifications on the
type of fluid to be used and other operation and
maintenance.information.
E - 9 ENGINE INSTRUMENTATION
The.helm.station.is.equipped.with.a.complete.set.of.
engine.instruments..These.instruments.allow.the.pilot.
to.constantly.monitor.the.operational.condition.of.the.
engine..Close.observation.of.these.instruments.could.
save.the.engine.from.damage.
Owner's Manual Page