Ventilation And Drainage Systems; Engine Compartment Ventilation; Cabin Ventilation - Four winns 338 Vista Owner's Manual

K - 1 ENGINE COMPARTMENT
VENTILATION
All Four Winns Vista models are equipped with
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engine compartment ventilation. This system is
designed to meet or exceed the requirements (in
effect at the time of manufacture) of the US Coast
Guard, the National Marine Manufacturers Associa-
tion, and the Ameri can Boat and Yacht Coun cil.
A. Natural Ventilation System
This system includes air intake and exhaust com-
ponents. The exhaust ducting reaches to the lower
bilge area. This provides adequate air movement
while underway and during bilge blower operation.
B. Forced Air Ventilation
All Four Winns Vista models are equipped with an
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electric bilge blower. The bilge blower provides the
venti lation required prior to starting the en gines and
while at idle. See Section H - Electrical Systems for
blower operation instructions.
Before starting the engine(s) or gener ator,
operate the engine compart ment bilge blower
for four (4) minutes. Then check the engine
com part ment for gasoline vapors. AL WAYS
oper ate the bilge blow er while the engines are
at idle or the genera tor is in use. Failure to
comply could cause explosion and there by
inflict serious injury or death.
Fumes can come from batteries while
charging. A concentration of hydrogen fumes
can be explo sive under the right conditions.
Ensure to follow the above warning.
NOTICE
A gas vapor detector is a monitor which will
alert the opera tor of an accu mula tion of
gaso line fumes in the engine compart ment.
It is optionally available on the 318 Vista
models. DO NOT rely solely on detectors or
similar equipment. ALWAYS conduct a
physical inspection of the engine compart ment.
Ventilation and Drainage Systems - Section K

Ventilation and Drainage Systems

C. Engine Ventilation System Mainte nance
Periodic inspection and cleaning of the ventilation
ducts is necessary to ensure adequate air circula tion.
A buildup of leaves, twigs, or other debris can severe-
ly reduce ventilation. Be sure bilge water does not
accumulate to a level that would obstruct the ventila-
tion ducts.
Blower operation can be tested by placing a hand
over the vents. DO NOT rely on the sound of the
blower. Be sure a substantial amount of air is being
exhausted by the bilge blower. Check the bilge blower
system often, preferably before each cruise.
K - 2

CABIN VENTILATION

The 338 Vista
es for ventilation. The aft cabin window also opens to
provide ventilation. The cabin side windows (portlight)
on these Vista
additional ventilation.
Failure to properly ventilate the boat while the
engines or generator are operating may permit
carbon monox ide to accumu late inside of the
cabin. Refer to Sec tion E-2 - Engine Exhaust
and Section B-2 - Carbon Monoxide for
addition al informa tion.
Screens and blinds for the forward deck hatches are
a standard feature. This "layered" deck hatch system
allows the screens and blinds to be slid to the desired
position with ease. Also, storage for the screens and
blinds are built into the screen/sun/shade system.
See Figure K1.
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cabins are equipped with deck hatch-
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models may be opened to provide
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Owner's Manual Page 122