11
105420
OWNER’S MANUAL
RESET
240 VO
LTS
R
ESET
RESET
RESET
RESET
TEST
120 VOLTS
R
E
SE
T
R
ES
ET
E
N
M
0
0
0
0
0
0
0
5
H
O
U
R
S
1
/1
0
120
ONLY
120
240V
Figure 15 - Receptacle Locations
120V, 15-Amp GFCI Duplex
120/240V, 20 or
30-Amp Twist-Lock
120V, 30-Amp
Twist-Lock
120V, 15-Amp Duplex
120/240V, 50-Amp
(Model MGH10000 only)
POWER CORD AND PLUG
REQUIREMENTS
120V, 30-amp twist-lock receptacle
• NEMA L5-30P plug
• Three-wire, 30-amp cord
120/240V, 20 or 30-amp twist-lock
receptacle
• NEMA L14-20P (20-amp) or L14-30P
(30-amp) plug
•Four-wire, 20-amp or 30-amp cord
120/240V, 50-amp receptacle
• NEMA L14-50P
•Four-wire, 50-amp cord
w
G
YX
Ground
X
(Hot)
W
(Neutral)
Y
(Hot)
Ground
(Green)
L14-20P
Plug
120V 120V
Neutral
120/240 Volt
20 Amp
w
G
YX
w
G
YX
120V 120V
Neutral
Ground
Ground
X
(Hot)
W
(Neutral)
Y
(Hot)
Ground
(Green)
L14-30P
Plug
L14-20P
Plug
120V 120V
Neutral
w
G
YX
Ground
L14-50P
Plug
120/240 Volt
20 and 30
Amp
120V 120V
Neutral
Figure 16 - Cord and Plug Configurations
Continued
Model MGH10000 also has a 120/240V,
50-amp receptacle (see Figure 15).
Model HWI3000 has only the 120V, 20-
amp duplex receptacle.
Models MGH3000 and MGH3000PR have
only the 120V, 15-amp GFCI duplex
receptacle.
OPERATION
Continued
Note:
If oil level is too low, oil alert system
will keep engine from starting (see Oil Alert
System, page 6). Make sure oil level is full
before starting. See Engine Oil, page 7.
Before starting the engine, disconnect all
electric loads from generator.
STARTING
IMPORTANT:
The engine speed is preset.
The throttle is locked in preset position. Do
not adjust throttle. Preset position lets en-
gine run at 3600 RPM under load. The
engine must maintain 3600 RPM for gen-
erator to create correct voltage. Running
engine at lower speeds will damage genera-
tor and powered items.
IMPORTANT:
Never start generator with
electrical loads connected. Start engine be-
fore adding electrical loads.
1. Make sure gasoline tank is full. See
Fuel, page 7 for fuel information.
2. Move fuel valve lever to the ON posi-
tion except on model MGH3000PR
(see Figure 17).
3. Move choke lever fully to the left for
all models except MGH3000PR and
MGH10000 (see Figure 17). Pull
choke rod for model MGH3000PR or
choke button for model MGH10000
out (see Figures 18 and 19). This
closes the choke.
Note:
You may not need to close
choke if engine is warm or air tem-
perature is high.
WARNING: Only responsible
adults should use generator.
Never let anyone operate genera-
tor without proper instructions.
PRESTART
Operate generator on a firm, dry, and clean
surface. The surface must be level. Protect
generator from heavy dust, sand, dirt, rain,
or snow. Do not locate generator near stand-
ing water and snow. Make sure area is well-
vented.
