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PART
10-2-STROMBERG BV-2 CARBURETTOR
10-19
1. Operate the engine to normalize
engine temperatures, and place the
car on a flat surface as near level as
possible. Stop the engine.
2.
Remove
the
carburettor
air
cleaner assembly (page
10.-67 ,)
Section
2) if it has not been previously re-
moved.
3.
Disconnect the choke cable from
the choke lever.
'- Remove the air horn retaining
screws and remove the air horn and
reinforcing bar.
5.
Using a suitable piece of material
block
off
the vacuum passage in the carb-
urettor body
(Fig.
10).
Start the engine.
Let the engine idle for sufficient time to
stabilize the fuel level then raise the gas-
ket to an out-of-the-way
position.
6. While the engine Is idling, use
a standard depth scale to measure
the vertical distance from the top
machined surface of the carburettor
main body to the level of the fuel
In the float chamber
<Fig.
10>. The
measurement must be maae away
from any vertical surface to ensure
an accurate reading, because the
surface of the fuel 1s concave <higher
at the edges than In the centre)
.
Float AdJustment
Care must
be
exercised to measure
the fuel level at the point of contact
with the fuel.
Do
not apply pressure on the fuel
inlet needle. The viton tip of the
fuel inlet needle may
be
damaged
through undue pressure exerted on It,
and thus cause Improper fuel level
wjthln the bowl. Refer to the speci-
fications <Part
10-9)
for the correct
fuel level <wet> setting.
VENT VALVE ADJUSTMENT
1. Ensure the engine idle speed is
correct and engine is at normal oper-
ating
temperature.
This is important
as it gives correct closed throttle
pcsition.
2.
Remove
the air cleaner assembly
(page
10- 67)
Section
2)
and with the
throttle
in
the idle position,
loosen
vent
valve
locknut and adjust from
.
05"-
.06"
to
the
closed position when
throttle
is opened.
3.
Install air cleaner
assembly.
(page
10- 67
•
Section
2).
CARIURmOR REPAIRS
AIR HORN TO MAIN BODY
GASKET REPLACEMENT-
I.
Remove
the
air cleaner
assembly.
FIG. 11
-Vent Valve
Adiustment-Strombe rg
BV2
2.
Remove the choke Unk from the
choke lever.
3.
Remove t..'lle air horn to main
body retaining screws and remove the
reinforcing bar.
'- Remove the carburettor air horn.
5. From the top of the pump stem
remove the spring cUp and withdraw
the pump rod from the main
body.
Remove and discard the gasket.
6. Install a new gasket on the
carburettor main
body.
Make sure the
gasket is not damaged and that no
foreign material has adhered to the
gasket.
7_ Insert the pump rod into its
guide hole In the main body and se-
cure on pump stem with spring
clip.
8. Replace the air horn and re-
inforcing bar and tighten
screws.
9. Replace choke unk and
clip.
10.
Replace
air cleaner
assembly.
11. Adjust the engine idle speed as out-
lined in this
section.
FLOAT OR NEEDLE VALVE
REPLACEMENT-
I. Remove the carburettor air horn
and gasket by following steps 1-5
under Air- Horn- to- Main-Body -Gasket
Replacement in this
section.
2.
If
necessary,
remove the float
chamber baffle and the fulcrum pin
retaining
clip.
The float assembly
and fulcrum pin can n0w be with-
drawn from the fuPl bowl.
3.
If
necessary, remove the fuel
line and unscrew needle valve and
seat from main body.
4.
If
the float was removed, install
the fulcrum pin in the float hinge
and position float in float chamber.
Replace
the
fulcrum-pin-retaining
clip.
5.
If
the float needle valve and
seat were removed insert the needle
valve into the bore, with the viton
tip toward the seat.
6. Install needle and seat in main
body and tighten with
wrench.
7. Reconnect fuel line and check
the float
setting.
Refer to Float Ad-
justment-Wet in this section for the
proper procedure.
8. Install the carburettor air horn
and gasket by following steps
6-10
under carburettor Air Horn to Main
Body Gasket Replacement in this
section.
MAIN JET REPLACEMENT
1. Remove the Metering Jet plug,
positioned below the fuel bowl. Re-
moval of this plug allows the fuel
bowl to drain and care should be
taken to prevent accidental ignition
of fuel.
2. With a special wrench the main
metering jet can be unscrewed from
its position and withdrawn through
the metering jet plug
hole.
3. Place the new main metering
jet in position on the wrench and
carefully feed through metering jet
plug
hole.
Screw the jet into position
without forcing or over-tightening.
4. Replace the metering jet plug
making sure that the copper seaUng
gasket is properly positioned. Tighten.
ACCELERATOR PUMP PLUNGER
REPLACEMENT
I.
Remove the air cleaner assembly
2. Withdraw
cho~e
link-retaining
clip and remove choke link
.
3. Remove the air horn to main
body retaining screws and the rein-
forcing bar. The air horn can now
be separated from the main
body.
4. Place a small lever such as a
screwdriver under the horizontal area
of the pump rod and lever upwards
to remove the split spring retaining
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