Maintenance.-.Engine.performance; Maintenance - External Conditions; Maintenance - Exhaust System Integrity; Maintenance.-.Ventilation.systems - Four winns 348 vista Owner's Manual

in.the.accumulation.of.carbon.monoxide.in.the..
accommodation.(occupied).space..Do not use
gasoline powered portable generators on Four
Winns boats.
®
T. Maintenance - Engine Performance
Efficient engine performance is vital to minimizing .
CO.production..The.following.items.are.those.consid-
ered.to.have.the.greatest.effect.on.increased.CO.
production:
1.. Fuel.Systems.-.Fuel.that.is.contaminated,.stale..
or.incorrect.octane.number
2.. Carburetors/Injectors
a. Dirty or clogged flame arrester
b.. Malfunctioning.automatic.choke.plate.or.faulty.
adjustment.of.manual.choke.plate
c. Worn float needle valve and seat
d. High float level
e.. Incorrect.idle.mixture.adjustment
f.. Dirty.or.worn.injectors
3.. Ignition.System
a.. Fouled.or.worn.spark.plug.
b.. Worn.points.or.incorrect.gap.on.points
c.. Shorted.or.opened.circuit.high.tension.spark.
plug.cables
d.. Incorrect.ignition.timing.
4.. General
a.. Worn.piston.rings.and.valves
b.. Engine.temperature.-.Cold.running.engines.
increase.CO.production..Engine.cooling.water.
system.design.and.selection.of.thermostat(s).
are.primary.considerations.affecting.engine.
operating.temperature..Generally,.an.engine.
produces.less.CO.if.it.operates.at.a.relatively.
high.temperature.within.manufacturer's.
specifications.
c.. Exhaust.Back-Pressure.-.Certain.alterations.
to.the.exhaust.system.may.increase.engine.
exhaust.back.pressure.and.CO.production.
d.. Restricted.engine.room.or.compartment.
ventilation
Boating Safety - Section B
U. Maintenance - External Conditions
External conditions that contribute to inefficient engine
performance.can.include:
1.. Fouled.hull.bottom
2.. Damaged.and.fouled.running.gear..
(i.e.,.shaft,.strut.propeller,.rudder.and.trim.tabs)
3.. Incorrect.selection.of.propeller.size
V. Maintenance - Exhaust System Integrity
Gas.tight.integrity.of.exhaust.systems.must.be.
maintained.to.insure.that.leakage.of.CO.within.the.
boat.does.not.occur..Disassembly.may.be.required..
to.carry.out.a.thorough.inspection..Repair.or.replace.
components.as.indicated..Inspect.the.following:
1.. Gaskets.at.cylinder.head.connection
2. Casting and pipe fittings in the dry section
3.. All.joints
4.. Hoses
5.. Clamps
6. Mufflers and their drain plugs
7. Thru-hull fittings
8.. Hangers.and.other.supports
W. Maintenance - Ventilation Systems
Boats.are.equipped.with.ventilation.systems.to.
eliminate.gasoline.vapors..Blowers.and.fans.may.also.
be.provided.for.ventilation.and.to.mitigate.the.migra-
tion.of.CO.into.occupied.compartments..Attention.
should.be.paid.to.the.following:
1.. Keeping.ventilation.intakes.clear.of.debris
2.. Replacing.damaged.hardware
3.. Maintaining.the.integrity.of.the.ducting.material.
and.its.connections
4.. Ensuring.that.position.of.ducting.intake.is.not.
obstructed.or.restricted,.collapsed,.kinked,..
or.crushed.
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