Table of Contents
Advertisement
K - 1
ENGINE COMPARTMENT
VENTILATION
All Four Winns
stern drive models are equipped with
®
engine compartment ventilation. This system is de-
signed to meet or exceed the requirements (in effect
at the time of manufacture) of the U.S. Coast Guard,
the National Marine Manufacturers Association, and
the Ameri can Boat and Yacht Coun cil.
A. Natural Ventilation System
This system includes air intake and exhaust com-
ponents. The air and exhaust ducts reach to the lower
bilge area. This provides adequate air movement
while underway and during bilge blower operation.
B. Forced Air Ventilation
All Four Winns
models are equipped with an electric
®
bilge blower. The bilge blower provides the venti lation
required prior to starting the en gines and while at idle.
See Sec tion H - Electrical Systems for blower opera-
tion instructions.
Gasoline vapors can explode resulting in injury
or death. Before starting the engine, check
the engine com part ment bilge for gasoline or
vapors, and operate blower for four (4) min-
utes, and verify blower operation. Run blower
when vessel is operating below cruising speed.
AL WAYS oper ate the bilge blow er while the
engines are at idle.
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 se-
verely 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.
Should blower noise and vibration be excessive,
loosening the bilge blower mounting screws and then
tightening evenly usually reduces noise considerably.
Ventilation & Drainage Systems - Section K
Ventilation and Drainage Systems
K - 2 HULL DRAINAGE SYSTEMS
A. Transom Drain
A transom drain with plug is provided in the engine
compartment to allow water drainage. When the boat
is out of the water, the boat and trailer should be
positioned so any bilge water accu mula tion during dry
stor a ge will flow towards the tran s om.
Be sure the drain plug is securely in place
prior to launching the boat. Upon ship ment of
the boat, the drain plug is usually taped to the
steering wheel.
B. Bilge Pump
A bilge pump is provided in the bottom of the hull to
remove miscellaneous water accumulations that might
occur during normal boating or weather conditions.
The bilge pump is controlled by the bilge pump switch
on the dash panel.
See Section H-4 for a detailed
descrip tion of the bilge pump switch .
The bilge pump is typically equipped with an automatic
switch. As the water level rises, the automatic float
switch will activate the pump. When leaving the boat
unattended for long periods of time or during excessive
rain storms, it is a good idea to check on the boat for
excessive water accumulation. Be sure both the bilge
pump and automatic float switch are operating properly.
The operating time of the bilge pump will be limited to
the battery capacity.
While at rest, any bilge water accumula tion may
flow forward. Therefore, operate the bilge pump
shortly after getting under way and while the
boat is at a sub stantial running angle. DO NOT
allow bilge water to accumulate. Damage to the
engine or other compo nents may result.
Periodically, clean the bilge pump strainers. DO NOT
allow dirt and debris to clog the bilge pump intakes.
Check operation of the bilge pump float switch often
to ensure movement of the switch is not restricted by
debris, portions of the hull, etc.
Wipe up any oil accumu lation in the bilge prior to
activa tion of the bilge pump. Pumping oil over board
will pol l ute the water, and is subject to fine.
NOTICE
Owner's Manual Page 91
Advertisement
Table of Contents
