4-58
FUEL
The primer
pump is operated
until the car-
buretor
is full of fuel.
The engine
is then
started.
Once the engine is operating,
even
at idle speed, pressurized
air is fed from the
intake
manifold
through
a check
valve
and
the
hose to the
fuel
tank.
As pressure
is
increased
inside
the
fuel
tank,
the
fuel
is
forced
through the fuel hose to the carbure-
tor.
Each
tank
should
build
and
retain
the
following pressures:
Model CD
Model AD
Model QD
Model FD
Model RD
2 to 4-1/2 lbs.
2 to 5 lbs.
2 to 5 lbs,
2 to 5-1/2 lbs.
2 to 4-1/2 lbs,
When the
engine
is shut
down and the
fuel hose is disconnected
from
the
engine,
the fuel tank cap should be opened slightly
to
allow
the
air
pressure
in the
tank
to
escape.
It is not a good practice
to allow
the tank to remain pressurized.
Any engine equipped
with this pressuriz-
ed fuel system
can be updated
by installing
a fuel
pump.
The
cost
of
replacing
the
pressurized-type
fuel tank actually
exceeds
the cost involved in making the conversion.
The necessary
work involves
drilling
a hole
in the bypass cover
to mount the pump and
provide
the pump with vacuum
from one of
Fuel and air pressure
lines
attached
to a pressure-
type fuel
tank through
the double connector.
The fuel
line has
a
rib extending
its [ull. length.
the
cylinders.
Installation
of new hoses to
the carburetor
is not a difficult
or expensive
task.
The
accompanying
illustration
clearly
shows the
two hoses connected
to the
fuel
tank.
The hose on the left transfers
fuel to
the carburetor
and the hose on the right
is
the
air pressure
line.
To assist
in identify-
ing the
fuel
line,
the
fuel
hose
has
a rib
extending
its
full length
from
the
tank
to
the
carburetor.
The primer
pump
is also
dearly
shown in the illustration.
DISASSEMBLING
WARNING
TAKE
EXTREME
CARE
during
work
with the fuel tank, because
highly flamable
fumes are present
and the danger
of fire or
explosion is present.
Demand
and observe
NO SMOKING
or open flame
in the
work
area.
Clean the tank in the out-of-doors.
1-
Check
to be sure
the
knob on the
pump shaft
is able
to rotate
on the
shaft.
The
knob
is secured
to
the
shaft
with
a
cotter
pin.
If the knob does not turn during
operation,
the
diaphragm
in the
pump will
be damaged or ruptured.
Explana tion
The following description
of pump opera-
tion may be helpful
in explaining
how dam-
age
to
the
diaphragm
may
be
caused
by
failure of the button
to turn.
When a person
operates
the
pump,
the
action
is not in a straight
down direction.
The natural
tendancy
is to turn the thumb or
hand while operating
the plunger.
The shaft
is
connected
directly
to
the
diaphragm.
Therefore,
if the
knob
fails
to
turn,
the
shaft will be torn away from the diaphragm.
Содержание 4906B 4HP 1969
Страница 5: ......
Страница 85: ...3 44 POWERHEAD EXHAUST COVER I LEVER Exploded drawing of a 5 5 hp powerhead 1956 60 principle parts identified...
Страница 87: ...3 46 POWERHEAD Exploded drawing of a 7 5 hp powerhead 1956 58 with principle parts identified...
Страница 88: ...CYLINDER BLOCK 3 47 HEAD GASKET RING...
Страница 89: ...3 48 POWERHEAD HEAD BYPASS COVER Exploded drawing of a 10 hp powerhead 1956 63 with principle parts identified...
Страница 90: ...CYLINDER BLOCK 3 49 THERMOSTAT EXHAUST COVER The...
Страница 137: ...4 46 FUEL LEVER AND LOW SPEED...
Страница 153: ...4 62 FUEL Exploded view of a pressure tyoe fuel tank with major parts identified...
Страница 157: ...4 66 fUEL...
Страница 177: ...5 18 IGNITION FLYWHEEL Exploded drawing of a typical magneto system Only one coil and set of points is shown...
Страница 271: ...8 12 LOWER UNIT PROPELLER Exploded drawing of the Weedless lower unit gear case with major parts identified...
Страница 285: ...8 26 LOWER UNIT Exploded drawing of a lower unit with a window for access to the shift connector...
Страница 412: ...A 16 APPENDIX Wire Identification 33 hp with Generator 1965 67...
Страница 413: ...APPENDIX A 17 o C...
Страница 414: ...Wire Identification 33 hp with Generator 1969 70...
Страница 415: ...APPENDIX A 19 Wire Identification 35 hp 1957 59...
Страница 416: ...A 20 APPENDIX Wire Identification 40 hp Standard Shift with Generator 1960 66...
Страница 417: ...APPENDIX A 21 UJ cc b Wire Identification 40 hp Standard Shift with Generator 1967 68...
Страница 418: ...A 22 APPENDIX ee I U Vl Z Z o U I I Wire Identification 40 hp Standard Shift With Generator 1969 10...
Страница 419: ...APPENDIX Wire Identification 40 hp Electric Shift with Generator 1961 66 A 23...
Страница 420: ...A 24 APPENDIX C 00 Wire Identification 40 hp Electric Shift with Generator 1967 68...
Страница 421: ...Wire Identification 40 hp Electric Shift with Generator 1969 70...
Страница 422: ...NOTES NUMBERS...