PORTABLE GASOLINEGENERATORS

OWNERS OPERATION AND INSTALLATION MANUAL

R

IMPORTANT: Read and understand this manual before operating or servicinggenerator. Improper use of generator can cause serious injury. Keep thismanual for future reference.

Generator Models: HWI3000, MGH3000, MGH3000PR, MGH4000C, MGH4000CI, MGH5000C,MGH5000CI, MGH5000CIE, MGH6000C, MGH6000CI, MGH7000C, MGH7000CI, and MGH10000

RESETTEST

120 VOLTS

FUEL

F

RESET

120/240 VOLTS

120240V

FULL POWERSELECTOR120ONLY

RESET

ENM00000005 HOURS 1/10

RESETTEST

120 VOLTS

RESET

240 VOLTS

OFF

Auto-IdleON

RESET

ENM00000005 HOURS 1/10

FUEL

F

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PORTABLE GASOLINE GENERATORSR

1. Gasoline presents a hazard of fire or ex-plosion. Gasoline is flammable. Its va-por 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 run-ning. Unhook all electrical loads andshut off engine before refueling.

Do not overfill fuel tank. Always al-low room for fuel to expand. If youoverfill tank, fuel can overflow ontohot generator. This can cause fire orexplosion. After refueling, tightlyclose fuel tank cap.

Do not spill fuel. Fuel or fuel vapormay ignite. If fuel spills, make surearea is dry before starting engine.

Never smoke in refueling area. Neverallow open flames or sparks in area.

Store fuel in approved container.Store fuel in a well-vented area freeof open flames or sparks.

2. Guard against fire hazard. Keep opera-tion area well-vented. Keep generatorat least three feet away from any ob-ject. Do not place flammable objectsnear generator. Do not use generator where flam-

mable vapors are present. Some va-pors are heavier than air. These va-pors settle in low-lying places.

Do not use generator in enclosedspaces. This includes motor home orRV generator compartments.

3. Guard against electric shock. Generatorproduces high voltage. This high voltagecan cause severe electric shock. Only re-sponsible adults should use generator. Properly ground generator before

starting. Never let anyone operate or service

generator without proper instruc-tions.

Avoid contact with live terminals orbare wires.

Do not use generator outdoors in rainor snow.

Do not use generator near standingwater or snow.

Do not use if generator is wet ordamp.

Do not use generator in highly con-ductive areas. These areas includemetal decking and steelwork.

Only use grounded extension cords.

Engine exhaust contains poisonous carbonmonoxide gas. Overexposure will cause lossof consciousness and will lead to death. Useonly in well-vented areas. Make sure areahas plenty of free-moving, fresh, outsideair. Never run generator in an enclosed orconfined area. Never run generator insideoccupied building.

Carbon Monoxide Poisoning: Earlysigns of carbon monoxide poisoning re-semble the flu, with headaches, dizziness,and nausea. If you have these signs, getfresh air at once! Some people are moreaffected by carbon monoxide than others.These include pregnant women, personswith heart or lung disease or anemia, thoseunder the influence of alcohol, and those athigh altitudes. Make certain you read andunderstand all warnings. Keep this manualfor reference. It is your guide to safe andproper operation of this generator.

Safety information appears throughout theseinstructions. Pay close attention to them.Below are definitions for the safety infor-mation listed throughout this manual.

DANGER: indicates a hazard which will causesevere personal injury, death, or substantialproperty damage if you ignore warning.

WARNING: indicates a hazard which cancause severe personal injury, death, or substan-tial property damage if you ignore warning.

CAUTION: indicates a hazard which willor can cause minor personal injury or prop-erty damage if you ignore warning.

SAFETYINFORMATION

Do not use any worn or damagedelectric cords. Electric shock or dam-age to generator may result.

Do not wear damp clothing or wetshoes when using generator.

4. Guard against burns. Hot engine partscan cause severe injury. Use cautionand remain alert when using generator. Keep children and animals away

from generator while it is running orhot.

Keep all covers and shields in place.Keep them tightly secured.

The muffler becomes very hot dur-ing operation. The muffler remainshot for a while after shutdown. Donot touch muffler while it is hot. Donot let muffler touch anything flam-mable. Let engine cool before trans-porting or storing.

5. Have standby installation to home orbuilding performed by a licensed elec-trician. Do not let anyone else wire intoa utility circuit. Personal injury, equip-ment damage, or damage to home couldoccur.

6. Never connect generator to any exist-ing electrical circuits. The generatoroutput will back-feed into the utilitypower line. This may electrocute apower company line repair person.Also, if generator is powering electri-cal circuits, the chance of an electricalfire exists.

7. Battery gives off explosive gases. Keepsparks, flames, and cigarettes away. Donot remove or install battery cableswhen engine is cranking or running.Only service or use battery in a well-vented area.

8. Battery contains sulfuric acid. Batteryacid is poisonous if swallowed. Con-tact with skin or eyes may cause severeburns. Do not tilt generator with bat-tery installed. Tilting could cause bat-tery acid to spill. Wear protective cloth-ing and face shield when servicing.Keep out of childrens reach.

WARNINGS

IMPORTANT: Read this ownersmanual and the engine ownersmanual carefully. Become famil-iar with this generator before try-ing to operate or service it. Knowits uses, limitations, and any haz-ards involved. Improper use ofgenerator can cause severe in-jury or death from explosion, fire,burns, electrical shock, or car-bon monoxide poisoning.

DANGER: Carbon monoxidepoisoning may lead to death!

3105420

OWNERS MANUAL

FUEL

F

FUEL

F

120ONLY

120240V

RESETTEST

120 VOLTS

120/240 VOLTS

RESET

RESET

ENM00000005 HOURS 1/10

FULL POWER

9. Only a qualified electrical service per-son should service and repair generator. Generator produces high voltage.

Use extreme caution when workingon electrical parts.

Always remove spark plug wire fromspark plug before servicing. This willprevent accidental starting.

When working on generator, avoid hotmuffler, exhaust manifold, and engineparts. Severe burns may occur.

Do not work on generator when tired. Use only factory approved replace-

ment parts.

10. Store generator in a well-vented area.Make sure fuel tank is empty. Neverstore with fuel in tank. Vapors mayreach an open flame or spark. Fire orexplosion may result.

11. Never operate generator if engine speed changes greatly if engine misfires often if powered items overheat if electrical output drops if it is sparking if it produces smoke or flames if it vibrates at high levels if it has a damaged receptacle

12. Keep generator and nearby areas clean. Keep generator free of oil, mud, and

other foreign matter. Remove anything that creates slip-

pery areas around generator. Remove oily rags and other items

that create fire hazards. Keep a fire extinguisher nearby.

Make sure it is rated ABC by theNFPA. They are good for all uses.Consult your local fire department.

Keep fire extinguisher well main-tained. Be familiar with its use.

13. Know how to stop engine quickly.Know how to use all controls.

14. Prolonged exposure to loud noise cancause hearing loss. When working around generator,

wear approved hearing protection. Remember neighbors when using

generator.

PRODUCTIDENTIFICATION

Gas Tank

Starter Grip

ChokeLever

FuelValveLever

Oil Dipstick

GroundLug

Alternator

Engine Engine ON/OFF Switch

Figure 1 - Portable Generator (Model MGH4000C Shown)

Run Lamp

120 VoltReceptacle(Duplex)

120 VoltReceptacle

Roll Cage

Gas Cap/Fuel Gauge

ControlPanel

Provision forAuto-Idle Switch

CircuitBreaker

120/240 VoltReceptacle

Full PowerSelector Switch

Hour Meter

120 VoltReceptacle(GFCI)

SAFETYINFORMATIONContinued

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PORTABLE GASOLINE GENERATORSR

VENTILATION

DUST, DIRT, RAIN,AND SNOW

HIGH AND LOWTEMPERATUREOPERATIONAir temperature affects generator output.Output drops 1% for each 10 temperaturerise above 60 F. Very low temperatures maymake the engine hard to start. See engineowners manual for more information.

GENERALINFORMATIONMaster portable generators are rugged andcompact. These models provide depend-able, trouble-free service. The alternatorsare brushless with revolving fields. Hondagasoline engines provide long life underheavy use. Honda engines have overheadvalves (OHV). This provides high perfor-mance with lower fuel consumption. Theseengines are governed to maintain enginespeed of 3600 RPM under load. 3600 RPMengine speed provides 120/240V, 60 Hzpower.

Additional Features Circuit breaker protection

Spark-arresting muffler (except modelMGH10000)

Large fuel tank

Oil alert system

Electric starter (models MGH5000CIE,MGH7000C, MGH7000CI, andMGH10000 only)

15-Amp ground fault circuit interrupter(GFCI) receptacle (Except HWI3000Model)

UNPACKING1. Remove generator from carton.

2. Remove any protective packaging ap-plied to generator for sh