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120 VOLTS 120/240 VOLTS
RESET
RESET
RESET FULL POWER RESET
SELECTOR
TEST
120 120
ONLY 240V
R
PORTABLE GASOLINE
GENERATORS
OWNER’S OPERATION AND INSTALLATION MANUAL
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
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SECTION PAGE CONTENTS Safety Information....................................................................... 3 Product Identification .................................................................. 6 General Information .................................................................... 7 Specifications .............................................................................. 7 Unpacking ................................................................................... 7 Ventilation
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SAFETY WARNINGS IMPORTANT: Read this owner’s manual and the engine owner’s INFORMATION 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 caus
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SAFETY ! WARNING 2. Guard against fire hazard. Keep operation area well-vented. INFORMATION Keep generator at least three feet away from any object. Do not place flam- mable objects near generator. Continued • 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. ! WARNING 3. Guard against electric shock. Generator produce
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SAFETY ! WARNING 8. Battery contains sulfuric acid. Battery acid is poisonous if INFORMATION 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 Continued protective clothing and face shield when servicing. Keep out of children’s reach. ! WARNING 9. Only a qualified electrical service person should service and repair generator. • Generator produces high voltage. Use extreme caution when working
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120 VOLTS 120/240 VOLTS RESET RESET FULL POWER RESET RESET SELECTOR TEST 120 120 ONLY 240V PRODUCT IDENTIFICATION Gas Cap/Fuel Gage Control Panel Run Lamp 120 Volt Receptacle Provision for Auto-Idle Switch 120 Volt Receptacle (GFCI) Full Power Roll Cage Selector Switch 120/240 Volt Gas Tank Circuit Receptacle Breaker Choke Lever Fuel Valve Lever Ground Lug Starter Grip Alternator Engine Engine Oil Dipstick ON/OFF Switch Figure 1 - Portable Generator (Model MGH4000A Shown) 6 FUEL F FUEL
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Master portable generators are rugged and compact. These models provide depend- GENERAL able, trouble-free service. The alternators are brushless with revolving fields. Honda gasoline engines provide long life under heavy use. Honda engines have overhead INFORMATION valves (OHV). This provides high performance with lower fuel consumption. These engines are governed to maintain engine speed of 3600 RPM under load. 3600 RPM engine speed provides 120/240V, 60 Hz power. Additional Features • Circuit
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VENTILATION DANGER 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. Engine exhaust contains poisonous carbon monoxide gas. Overexposure will cause loss of consciousness and will lead to death. This generator needs cooling air to run properly. Never block free-flowing, cooling air to generator. Overheating will occur without cooling air. This will damage t
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OIL ALERT SYSTEM GENERATOR The oil alert system protects the engine from low oil damage. This system auto- FEATURES matically shuts down the engine and prevents engine restarting if the oil level falls too low. Note: When this happens, the engine switch remains in the ON position. The oil alert system is wired into the ON/OFF Switch. If this system shuts down the engine, the engine will not start until you add oil. Add oil to engine (see Engine Oil, page 11). Note: Operate generator on a level s
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RESET TEST GROUND FAULT CIRCUIT INTERRUPTER RECEPTACLE GENERATOR All models have a 120-volt ground fault circuit interrupter (GFCI) receptacle. The FEATURES GFCI receptacle is on the control panel or top cover of alternator (model Continued MGH3000 only). The GFCI protects you against hazardous electrical shock caused when your body becomes a path through which electricity travels to reach ground. This could happen when you touch an appliance or cord that is ‘live’ through faulty mechanism, damp
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RECEPTACLE CIRCUIT BREAKER GENERATOR The circuit breakers protect the receptacles and alternator. Overloading generator FEATURES will trip circuit breaker. A short circuit in item being powered will also trip Continued breaker. If this occurs, unplug electrical load from receptacle. Let circuit breaker cool down. Push circuit breaker button to reset. Electric motors need higher starting current. They require up to three-times their rated wattage to start. The starting current needed may be too h
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FUEL WARNING Gasoline presents a hazard of fire or explosion. Gasoline is flammable. Its vapor is explosive. • Keep fuel out of children’s 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 over- flow onto hot engine. This can cause fire or explosion. After refuel
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BATTERY CAUTION (Model MGH7000 Only) If you remove battery, insulate the red, positive (+) Continued battery cable terminal. Insulate with electrical tape. Exposed terminal may spark when generator runs. IMPORTANT: Make sure battery connections are the correct polarity. Electric start generators use negative ground, 12-volt DC starting system. Model MGH7000 has an electric starter. A battery is not supplied with generator. You must provide a 12-volt, 32-amp-hour battery. The positive and negativ
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MOUNTING BATTERY TO GENERATOR BATTERY 1. Secure battery to generator by battery hold-down system. This system consists (Model MGH7000 Only) of the battery mounting bracket, hook bolts, and nut (see Figure 10). Continued 2. Locate the red, positive (+) battery cable from starter solenoid. Connect it to the positive (+) battery terminal (see Figure 11). 3. Locate the black, negative (–) battery cable attached to engine block. Connect it to the negative (–) battery terminal (see Figure 11). 4. Chec
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GENERATOR WARNING GROUNDING You must properly earth-ground generator before starting. This will help guard against deadly electric shock. Only use grounded plugs with generator. Only use grounded extension cords. Only use three- wire or double-insulated power tools. Grounding generator helps prevent electric shock from a ground fault condition. Locate ground lug on end of generator housing (see Figure 12). Attach a #10 stranded-copper ground wire to ground lug. Drive grounding point into ground.
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Only use grounded extension cords. Be sure to use extension cord with proper wire EXTENSION gauge size. See chart below. CORDS Recommended Minimum Wire Gauges (AWG) for Extension Cords Ampere AWG for Length of Cord in Feet Load 50' 100' 150' 218 18 18 318 18 18 416 16 16 516 16 16 616 16 14 816 14 12 10 16 14 12 12 14 14 12 14 14 12 10 16 12 12 10 20 10 10 8 STANDBY WARNING INSTALLATION Have standby installation performed by a skilled, licensed electrician. Do not let anyone else wire into TO HO
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other. For standby service to home or building, only include items you must DETERMINING power. ELECTRICAL 2. Enter running watts of each item except motors. The light bulb or appliance nameplate lists its wattage. Remember, 1KW = 1000 watts. Note: The name- LOAD FOR plate may not list wattage. It may only list volts and amps. The formula for GENERATOR finding wattage is: Volts x Amps = Watts. For example: An appliance name- plate states 3 amps at 120 volts. 3 amps x 120 volts = 360 watts. Contin
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120 VOLTS 120/240 VOLTS RESET RESET FULL POWER RESET SELECTOR RESET TEST 120 120 ONLY 240V GENERAL INFORMATION OPERATION This generator is not large enough to power your entire home. Do not connect generator to any existing electrical circuits. Plug items directly into generator receptacles. Do not exceed amperage rating of receptacles. Only use grounded cords. DANGER Use only in well-vented areas. Make sure area has plenty of free-moving, fresh, outside air. Never run generator in an enclosed o
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POWER CORD AND PLUG REQUIREMENTS OPERATION 120V, 30-amp twist-lock receptacle Continued • 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 Volt 30 Amp L5-30P W X Plug X G Ground (Hot) (Green) W (Neutral) Neutral 120V 120V w 120/240 Volt L14-20P YX 20 and 30 G Plug Amp Ground X Ground Neutral (Hot) (Green) 120V 120V w YX L14-30P G Plug W Y (Neutral) (Hot) Ground Figure 14
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PRESTART OPERATION Operate generator on a firm, dry, and clean surface. The surface must be level. Continued Protect generator from heavy dust, sand, dirt, rain, or snow. Do not locate genera- tor near standing water and snow. Make sure area is well-vented. WARNING Only responsible adults should use generator. Never let anyone operate generator without proper instruc- tions. Note: If oil level is too low, oil alert system will keep engine from starting (see Oil Alert System, page 9). Make sure o
