N MANUAL
R
Generator Models: MGH3000, MGH4000A, MGH5000A, MGH6000, and MGH7000
IMPORTANT
Read and understand this manual before operating or servicing
generator. Improper use of generator can cause serious injury.
Keep this manual for future reference.
FUEL
F
RESET
120/240 VOLTS
120
240V
FULL POWER
SELECTOR
120
ONLY
RESET
TEST
RESET
120 VOLTS
RESET 2
SECTION
PAGE
Safety Information ....................................................................... 3
Product Identification .................................................................. 6
General Information .................................................................... 7
Specifications .............................................................................. 7
Unpacking ................................................................................... 7
Ventilation ................................................................................... 8
Dust, Dirt, Rain, and Snow ......................................................... 8
High and Low Temperature Operation ....................................... 8
Generator Features ...................................................................... 9
Oil Alert System ................................................................... 9
Full Power Selector Switch .................................................. 9
Electric Start (Model MGH7000 Only) ................................ 9
Ground Fault Circuit Interrupter Receptacle ...................... 10
Engine Circuit Breaker (Model MGH7000 Only) .............. 10
Receptacle Circuit Breaker ................................................. 11
Engine Oil .................................................................................. 11
Fuel ............................................................................................ 12
Battery (Model MGH7000 Only) .............................................. 12
Generator Grounding ................................................................. 15
Extension Cords ........................................................................ 16
Standby Installation To Home Or Building .............................. 16
Determining Electrical Load For Generator ............................. 16
Operation ................................................................................... 18
General Information ............................................................ 18
Using Receptacle ................................................................ 18
Power Cord and Plug Requirements ................................... 19
Prestart ................................................................................ 20
Starting ................................................................................ 20
High Altitude Operation ..................................................... 22
Adding Electrical Loads ..................................................... 22
Disconnecting Electrical Loads .......................................... 22
Stopping Engine .................................................................. 23
Maintenance and Repairs .......................................................... 24
Storage ....................................................................................... 24
Troubleshooting......................................................................... 25
Electrical Component Specifications ........................................ 25
Wiring Diagrams ....................................................................... 26
Parts Centrals ............................................................................. 27
Technical Service ...................................................................... 28
Servicing The Engine ................................................................ 28
Replacement Parts ..................................................................... 28
Accessories ................................................................................ 28
Illustrated Parts Lists ........................................................... 29-34
Warranty Information ................................................. Back Cover
CONTENTS 3
SAFETY
INFORMATION
WARNINGS
IMPORTANT: Read this owners manual and the engine owners
manual carefully. Become familiar with this generator before trying to
operate or service it. Know its uses, limitations, and any hazards
involved. Improper use of generator can cause severe injury or death
from explosion, fire, burns, electrical shock, or carbon monoxide
poisoning.
DANGER
Carbon monoxide poisoning may lead to death!
Engine exhaust contains poisonous carbon monoxide gas. Overexposure will
cause loss of consciousness and will lead to death. Use only in well-vented areas.
Make sure area has plenty of free-moving, fresh, outside air. Never run generator
in an enclosed or confined area. Never run generator inside occupied building.
Early signs of carbon monoxide poisoning resemble the flu, with headaches,
dizziness, and nausea. If you have these signs, get fresh air at once! Some people
are more affected by carbon monoxide than others. These include pregnant
women, persons with heart or lung disease or anemia, those under the influence of
alcohol, and those at high altitudes. Make certain you read and understand all
warnings. Keep this manual for reference. It is your guide to safe and proper
operation of this generator.
Safety information appears throughout these instructions. Pay close attention to
them. Below are definitions for the safety information listed throughout this
manual.
DANGER
indicates a hazard which will cause severe personal injury,
death, or substantial property damage if you ignore warning.
WARNING
indicates a hazard which can cause severe personal injury,
death, or substantial property damage if you ignore warning.
CAUTION
indicates a hazard which will or can cause minor personal
injury or property damage if you ignore warning.
1.
!
WARNING
Gasoline presents a hazard of fire or explosion. Gasoline is
flammable. Its vapor is explosive.
Keep fuel out of childrens reach.
Refuel generator in a well-vented area. Do not fill fuel tank in the dark. Do
not refuel while engine is running. Unhook all electrical loads and shut off
engine before refueling.
Do not overfill fuel tank. Always allow room for fuel to expand. If you
overfill tank, fuel can overflow onto hot generator. This can cause fire or
explosion. After refueling, tightly close fuel tank cap.
Do not spill fuel. Fuel or fuel vapor may ignite. If fuel spills, make sure
area is dry before starting engine.
Never smoke in refueling area. Never allow open flames or sparks in area.
Store fuel in approved container. Store fuel in a well-vented area free of
open flames or sparks.
Continued 4
SAFETY
INFORMATION
Continued
2.
!
WARNING
Guard against fire hazard. Keep operation area well-vented.
Keep generator at least three feet away from any object. Do not place flam-
mable objects near generator.
Do not use generator where flammable vapors are present. Some vapors
are heavier than air. These vapors settle in low-lying places.
Do not use generator in enclosed spaces. This includes motor home or RV
generator compartments.
3.
!
WARNING
Guard against electric shock. Generator produces high voltage.
This high voltage can cause severe electric shock. Only responsible adults
should use generator.
Properly ground generator before starting.
Never let anyone operate or service generator without proper instructions.
Avoid contact with live terminals or bare wires.
Do not use generator outdoors in rain or snow.
Do not use generator near standing water or snow.
Do not use if generator is wet or damp.
Do not use generator in highly conductive areas. These areas include metal
decking and steelwork.
Only use grounded extension cords.
Do not use any worn or damaged electric cords. Electric shock or damage
to generator may result.
Do not wear damp clothing or wet shoes when using generator.
4.
!
WARNING
Guard against burns. Hot engine parts can cause severe injury.
Use caution and remain alert when using generator.
Keep children and animals away from generator while it is running or hot.
Keep all covers and shields in place. Keep them tightly secured.
The muffler becomes very hot during operation. The muffler remains hot
for a while after shutdown. Do not touch muffler while it is hot. Do not let
muffler touch anything flammable. Let engine cool before transporting or
storing.
5.
!
WARNING
Have standby installation to home or building performed by a
licensed electrician. Do not let anyone else wire into a utility circuit. Personal
injury, equipment damage, or damage to home could occur.
6.
!
WARNING
Never connect generator to any existing electrical circuits. The
generator output will back-feed into the utility power line. This may electro-
cute a power company line repair person. Also, if generator is powering
electrical circuits, the chance of an electrical fire exists.
7.
!
WARNING
Battery gives off explosive gases. Keep sparks, flames, and
cigarettes away. Do not remove or install battery cables when engine is
cranking or running. Only service or use battery in a well-vented area.
Continued 5
SAFETY
INFORMATION
Continued
8.
!
WARNING
Battery contains sulfuric acid. Battery acid is poisonous if
swallowed. Contact with skin or eyes may cause severe burns. Do not tilt
generator with battery installed. Tilting could cause battery acid to spill. Wear
protective clothing and face shield when servicing. Keep out of childrens
reach.
9.
!
WARNING
Only a qualified electrical service person should service and
repair generator.
Generator produce