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2.. Reduced.power.resulting.from.increased.altitude.
may.require.adjustments.to.propeller.size.
3.. Heavy.sea.or.out.of.trim.conditions.tend.to.load.
engines.resulting.in.reduced.performance.and.
thereby.increasing.their.CO.production.
S. Portable Generator Sets
Never use a portable generator on a boat.
Gasoline-powered.portable.generators.are.available..
in.the.marine.market.place.and.are.not.an.option.
available.through.Four.Winns..Portable.generators..
will.produce.CO..These.sets.discharge.their.exhaust.
products.in.locations.which.can.lead.to.an.increase..
in.the.accumulation.of.carbon.monoxide.in.the.accom-
modation.occupied.space..Do not use gasoline-pow-
ered portable generators on Four Winns
T. Maintenance - Engine Performance
Efficient engine performance is vital to minimizing .
CO.production..The.following.items.are.those.con-
sidered.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
Boating Safety - Section B
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.rela-
tively.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.
boats.
®
d.. Restricted.engine.room.or.compartment..
ventilation
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.,.outdrive.
shaft,.strut.propeller,.rudder.and.trim.tabs,..
if.applicable)
3.. Incorrect.selection.of.propeller.size
V. Maintenance - Exhaust System Integrity
Gas.tight.integrity.of.exhaust.systems.must.be.main-
tained.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:
Owner's Manual Page
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