Four winns FUNSHIP - Portable.generator.sets; Maintenance.-.Engine.performance; Maintenance.-.External.conditions; Maintenance.-.Exhaust.system.integrity

Owner’s Manual Page 32Boating 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
specications.
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
U. Maintenance - External Conditions
Externalconditionsthatcontributetoinefcient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:
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
i
n 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
®
boats.
T. Maintenance - Engine Performance
Efcient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amearrester
b. Malfunctioning automatic choke plate or faulty
adjustment of manual choke plate
c. Wornoatneedlevalveandseat
d. Highoat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