GAS LOAD NEEDLE
GAS
INLET
CLAMP
GASOLINE
IDLE
NEEDLE
IDLE
SPEED
^/ADJUSTMENT
SCREW
GAS
HOSE
TO
REGULATOR
CHOKE
SHAFT
GASOLINE
LOAD NEEDLE
FIGURE
31.
GAS-GASOLINE CARBURETOR
GAS-GASOLINE
CONVERSION
(All
Specs)
Engines having
a
combination gas-gasoline car-
buretor can
be
switched
to
gasoline operation
by the
following procedure:
1.
Close
the
manual fuel shutoff valve
in
supply line
for natural-,
gas or
propane-butane vapor,
wherever located.
2.
Open
the
gasoline fuel shutoff valve, wherever
located.
3.
Set the
spark plug
gap to
.025".
4.
See
that
the
choke
is
free
and
works easily.
Be
sure
to
release choke lock
on
electric choke.
5. Start
the
engine
in the
manner described
for the
engine.
If the
engine runs unevenly under half or
full load
due to
faulty carburetor adjustment,
the
load needle needs adjusting. This
is not the
same
load adjusting needle used
for
gaseous fuel.
Another adjusting needle
is
provided
for
this
purpose (refer
to
Adjustments).
To change back to gaseous operation, reverse the above procedure
and reset
the
spark plug
gap to
.018".
CHOKE
ADJUSTMENT
Despite choke design,
all
chokes perform
the
same
function:
control
the
amount
of air
intake
to the
carburetor venturi. When
the
engine
is
first started,
the choke
is
closed
but
gradually opensastheengine
MAGNETIC COIL
AND CORE ASSEMBLY
INOED
GN ET
ARM
SISSON
THERMO-MAGNETIC
FIGURE
32.
CHOKE ADJUSTMENTS
22
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