32
OP
ERATION
RHEOSTAT CONTROL, MAGNET SERVICE.· -
Be
sure
the field
.
rheostat
is
turned
to
its
maximum
resistance
position (minimum
generator
voltage)
before
starting
the
plant.
After
connecting
the
magnet by
operating
the
mag-
net
controller,
adjust
the
rheostat
to
give a
generator
voltage of 250
volts,
or
to
the
rated
voltage of
the
magneto When
first
connected,
the
the
magnet
resistance
is
comparatively
low,
so
more
rheostat
resist
...
ance
is
needed
to
keep
the
voltage
at
the
proper
value. As
the
magnet
warms
up
in
use,
the
rheostat
must
be
readjusted
to
bring
the
voltaie
up
to
normal.
. .
BATTERY CHARGE RATE. -
The
battery
charge
rate
is
automatically
controlled
by a voltage
regulator.
cOn
AC
plants,
the
high
charge
rate
was
set
at
the
factory
for
average
op-
erating
conditions.
If
frequent
starts
and
short
operating
periods
re-
quire
an
increased
high
charge
rate,
adjust
by
moving
the
slide
clip on
the
adjustable
resistor
in
the
control
box.
On
plants
with a
separate
charging
generator,
failure
of
charge
current
could be due
to
a blown
fuse
in
the
voltage
regulator.
. .
STOPPING THE PLANT. - To stop
the
manual and
portable
type engine,
press
the STOP button on
the
blower housing
until
the
engine
has
come
to a
complete
stop.
The
high tenSion
mag-
neto
provides
a
firing
spark
even when the engine
is
running
at
very
few
rpm.
Release
of
the
STOP
switch
too soon will allow the
plant
to
again
pick up
speed
and continue
to
run.
To
stop
the
a c
remote
control
plant, push
the
START-STOP switch
to
the
STOP postion.
To.
stop
the
magnet
service
plant,
snap
the
ignition
switch
to
its
OFF
position.
In
an
emergency,
if
the STOP button
fails
to work, the plant may be
stopped
by
closing
the fuel shut-off
valve.·
.
. .
CHANGING
TO GASOLINE OPERATION. - Engines having a combina-
. tion
gas-gasoline
carburetor
can
be
switched
to
gasoline
operation
by
the
following
procedure:
(1)
Shutoff
the
supply
of
natural
gas
or
Propane.,.Butanevapori (2) Open
the
gasoline
shut-off
valve; (3)
Unscrew
the
carburetor
float lock
all
the
way outward
to
back
seat
(necessary
to
preventleakage);
(4) Set the
spark
plug gap
as
given in the Table of
Clearances;
(5)
See
that
the
choke
is
free
and
works
easily;
(6)
Start
the engine in
the
manner
de-
scribed
for
the
engine.
If
the
engine
runs
unevenly
under half
or
full
load
due to faulty
carburetor
adjustment,
the
main
jet
needs adjusting.
This
is
not the
same
main adjusting
screw
used
for
gaseous
fuel.
An-
other
adjusting
screw
is
provided
for
this
purpose.
See
the
illustration,
Carburetor
Adjustments
under ADJUSTMENTS.
To
change
back
to natural, Propane or
Butane
operation
reversethe
ab.ove
procedure
and
reset
the spark
plug
gap, . ,
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