Portable Generator Sets; Maintenance - Engine Performance; Maintenance - External Conditions; Maintenance - Exhaust Systems Integrity - Four winns FREEDOM Owner's Manual

R. 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 cause accumulation of carbon monoxide in the accom-
modation space. Do not use gasoline powered por-
table generators on Four Winns® boats.
S. Maintenance - Engine Performance
Efficient engine performance is vital to minimizing CO pro-
duction. The following items are those considered 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.
Freedom™/Horizon™ Owner's Manual
4. General
a. Worn piston rings and valves
b. Engine temperature - Cold running engines in-
crease CO production. Engine cooling water sys-
tem design and selection of thermostat(s) are
primary considerations affecting engine operat-
ing temperature. Generally, an engine produces
less CO if it operates at a relatively high tem-
perature within manufacturer's specifications.
c. Exhaust Back-Pressure - Certain alterations to
the exhaust system may increase engine ex-
haust back pressure and CO production.
d. Restricted engine room or compartment ventila-
tion
T. 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
U. 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:
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
Section B
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