Lincoln Electric IM833 RANGER 250G - Manual (Page 21)

B-4 OPERATION B-4
Operating the starter motor for more than 5 seconds
can damage the motor. If the engine fails to start,
release the switch and wait 10 seconds before opera-
tion 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.
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NOTE: When starting a Ranger 250 for the first time,
or after an 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 THE ENGINE
Remove all welding and auxiliary power loads and
allow the engine to run at low idle speed for a few min-
utes 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
Ranger 250 because the fuel tank is mounted below
the engine.
WELDER OPERATION
DUTY CYCLE is the percentage of time the load is
being applied in a 10 minute period. For example, a
60% duty cycle represents 6 minutes of load and 4
minutes of no load in a 10 minute period.
DC STICK WELDING
The Ranger 250 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 flat horizontal and vertical-up welding
with all types of electrodes, especially low hydrogen.
The output CONTROL dial adjusts the full output
range for stick welding.
The ARC CONTROL dial sets the short circuit current
(arc-force) during stick welding to adjust for a soft or
crisp arc. Increasing the number from -10(soft) to
+10(crisp) increases the short circuit current and pre-
vents sticking of the electrode to the plate while weld-
ing. This can also increase spatter. It is recommended
that the ARC CONTROL be set to the minimum num-
ber without electrode sticking. Start with the dial set at
0.
DOWNHILL 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 CON-
TROL dial sets the short circuit current (arc-force) dur-
ing stick welding to adjust for a soft or more forceful
digging arc (crisp). Increasing the number from -
10(soft) to +10(crisp) increases the short circuit cur-
rent which results in a more forceful digging arc.
Typically a forceful digging arc is preferred for root and
hot passes. A softer arc is preferred for fill and cap
passes where weld puddle control and deposition
(“stacking” of iron) are key to fast travel speeds. This
can also increase spatter. It is recommended that the
ARC CONTROL be set to the minimum number with-
out electrode sticking. Start with the dial set at 0.
RANGER 250
CAUTION
TYPICAL RANGER 250 FUEL CONSUMPTION
Kohler CH20 Onan P220,Robin-Subaru Running Time for
20HP @ 3600 RPM 20.5HP @ 3600 RPM 12 gallons-hours
Gal./Hr (Liters/Hr) Gal./Hr (Liters/Hr) CH20/P220 OHV
Robin-Subaru
Low Idle - No Load
2400 R.P.M.
0.6 (2.3) 0.5 (1.9) 20/24
High Idle - No Load
3700 R.P.M.
0.8 (3.0) 0.8 (3.0) 15/15
DC Weld Output
250 Amps @ 28 Volts 1.40 (5.3)
1.6 (5.9) 8.6/7.5
Auxiliary Power
8,500 Watts
1.47 (5.6) 1.7 (6.4) 8.2/7.0