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B-4
• The engine will run at high idle speed for approxi-
mately 12 seconds and then go to low idle speed.
Allow the engine to warm up at low idle for several
minutes before applying a load and/or switching to
high idle. Allow a longer warm up time in cold weath-
er.
CAUTION
Operating the starter motor for more than 5 sec-
onds can damage the motor. If the engine fails to
start, release the switch and wait 10 seconds
before operation the starter again. Do NOT push
the START button while the engine is running
because this can damage the ring gear and/or the
starter motor.
------------------------------------------------------------------------
NOTE: When starting a GX 300 for the first time, or
after and extended period of time of not operating, it
will take longer than normal because the fuel pump
has to fill the fuel line and carburetor.
STOPPING
Remove all welding and auxiliary power loads and
allow the engine to run at low idle speed for a few
minutes to cool the engine.
Stop the engine by placing the RUN-STOP in the
STOP position.
NOTE: A fuel shut off valve is not required on the GX
300 because the fuel tank is mounted below the
engine.
Low Idle - No Load
2
4
0
0
. R
. P
M
High Idle - No Load
3
7
0
0
. R
. P
M
DC Weld Output
2
4
0
A
m
p
s
@
DC Weld Output
3
0
0
A
m
p
s
@
Auxiliary Power
9
5 ,
0
0
W
t a
s t
OPERATION
TYPICAL GX 300 FUEL CONSUMPTION
Kohler CH22
gal./hr (liters/hr)
.
5 .
1
(
. 1
.
8 .
3
(
. 3
2
9
V
o
s t l
1
3 .
9
2
9
V
o
s t l
1
5 .
3
1
6 .
4
(
WELDER OPERATION
Stick Welding
The GX 300 can be used with a broad range of DC
stick electrodes.
The MODE switch provides two stick welding settings
as follows:
Constant Current (CC-STICK) Welding
The CC-STICK position of the MODE switch is
designed for horizontal and vertical-up welding with all
types of electrodes, especially low hydrogen. The out-
put CONTROL dial adjusts the full output range for
stick welding.
The ARC CONTROL knob sets the short circuit cur-
rent during stick welding (arc-force). Increasing the
number from -10 to +10 increases the short circuit cur-
rent and prevents sticking of the electrode to the plate
while welding. This can also increase spatter. It is rec-
ommended that the ARC CONTROL be set to the
minimum number without electrode sticking. Start with
the dial set at 0.
PIPE Welding
This slope controlled setting is intended for "out-of-
position" and "down hill" pipe welding where the oper-
ator would like to control the current level by changing
the arc length. The output CONTROL dial adjusts the
full output range for pipe welding.
The ARC CONTROL knob sets the short circuit cur-
rent during stick welding (arc-force). Increasing the
number from -10 to +10 increases the short circuit cur-
rent and prevents sticking of the electrode to the plate
while welding. This can also increase spatter. It is rec-
ommended that the ARC CONTROL be set to the
minimum number without electrode sticking. Start with
the dial set at 0.
Running Time for
12 gallons -(hrs.)
) 9
) 2
(
. 5
) 3
(
. 5
) 8
. 6
) 2
GX 300
2
3
5 .
1
4
5 .
8
6 .
7
8 .
7
3 .
B-4
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