R PORTABLE GASOLINE GENERATORS OWNER’S OPERATION AND INSTALLATION MANUAL EL FU E F 0V K 12 OC ISTL TW 0V 12 0V 12 CI GF T SE RE ST TE UR HO R TE ME V 40 K 0/2 12 TLOC IS TW V 40 K 0/2 12 TLOC IS TW M EN 05 00 00 1/10 00 HO UR S LE -ID TO AU T SE RE ON T SE RE F OF T SE RE T SE RE FU EL E F Generator Models: MGH8500AIE and MGH10000C IMPORTANT: Read and understand this manual before operating or servicing generator. Improper use of generator can cause serious injury.
R PORTABLE GASOLINE GENERATORS SAFETY INFORMATION 1. WARNINGS IMPORTANT: Read this owner’s manual and the engine owner’s 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.
OWNER’S MANUAL SAFETY INFORMATION Continued 9. Gas Cap/Fuel Gauge Gas Tank Wheels (2) Roll Cage Auto-Idle Switch 120/240 Volt Receptacle 120/240 Volt, 50 Amp Receptacle Oil Dipstick Oil Filler Cap Circuit Breaker Choke Lever 45 45 30 30 20 Run Lamp ET RES T TES 20 Hour Meter Engine E F 117846 Alternator EL FU 14. Oil Filter Handles (2) F 13. Ground Lug E 12. Control Panel L 11. Air Filter Housing E FU 10.
R PORTABLE GASOLINE GENERATORS PRODUCT IDENTIFICATION VENTILATION (Continued) Choke Lever Gas Tank Gas Cap/Fuel Gauge DANGER: Use only in wellvented 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.
OWNER’S MANUAL SPECIFICATIONS MODEL MGH10000C GENERATOR FEATURES MGH8500AIE Electrical Rated Wattage .........................10,000 ............................ 8500 Rated Amperage 120 V ....................................83.3 ...............................70.8 240 V ....................................41.7 ...............................35.4 OIL ALERT SYSTEM The oil alert system protects the engine from low oil damage.
R PORTABLE GASOLINE GENERATORS GENERATOR FEATURES Continued AUTO-IDLE SYSTEM The Auto-Idle System allows the engine to idle down or run at a slower speed when the generator is not being used to supply power. The Auto-idle system can be turned ON or OFF by a rocker switch on the control panel. When the switch is in the OFF position, the engine runs at full speed all of the time. When the switch is in the ON position, the engine slows down to idle speed until an electrical load is applied.
OWNER’S MANUAL CHECKING OIL LEVEL AND ADDING OIL Follow steps below to check oil level. Make sure engine is level and stopped. 1. Remove dipstick (see Figure 6). Wipe dipstick clean. 2. Insert dipstick into oil filler neck. Oil level should be between the two dots on dipstick. 3. If level is low, fill to top dot on dipstick. Only use oil recommended in engine owner’s manual. Note: If oil level is too low, oil alert system will shutdown engine and prevent engine from restarting.
R To Engine Block (–) MOUNTING BATTERY TO GENERATOR 4.
OWNER’S MANUAL GENERATOR GROUNDING WARNING: 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. SEMS Nut WARNING: Have standby installation performed by a skilled, licensed electrician. Do not let anyone else wire into a utility circuit. Personal injury, equipment damage, or damage to home 0V 24 CK occur.
R PORTABLE GASOLINE GENERATORS DETERMINING ELECTRICAL LOAD FOR GENERATOR You must decide what electrical load your generator can power. Do this before using generator. Use the following four-step method. It will help you select a load that is not too large. Make sure total wattage of all electrical loads does not exceed rated wattage of generator. For rated wattage of your generator, see Specifications, page 5. Electric motors present a special problem when figuring load. Read Step 3 carefully. 1.
OWNER’S MANUAL OPERATION GENERAL INFORMATION DANGER: Never connect generator to any existing electrical circuits.The generator output will back-feed into the utility power line.This may electrocute a power company line repair person. Also, if generator is powering electrical circuits, the chance of an electrical fire exists. Note: We supply the engine owner’s manual with generator. Refer to that manual for questions concerning engine operation.
R PORTABLE GASOLINE GENERATORS OPERATION Continued 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 PRESTART 3. Operate generator on a firm, dry, and clean surface. The surface must be level.
OWNER’S MANUAL OPERATION Continued AUTO-IDLE OPERATION IMPORTANT: Never start engine with electrical loads connected. Start engine before adding electrical loads. 1. If engine is cold, turn the Auto-Idle switch OFF (see Figure 19). 2. Start engine. Allow engine to warm up with no load for five minutes. 3. Turn Auto-Idle switch ON. Engine will slow to idle speed. Engine idle speed is preset. Idle speed adjustment should not be necessary. 4.
R PORTABLE GASOLINE GENERATORS OPERATION Continued HIGH ALTITUDE OPERATION This generator will not perform well at high altitudes without proper adjustment. See engine owner’s manual for details. ADDING ELECTRICAL LOADS IMPORTANT: Do not overload generator. Make sure total wattage of all electrical loads does not exceed rated wattage of generator. Overloading may shorten generator life. It could also cause internal damage to generator. Overloading will trip circuit breaker. 1. Check items to be powered.
OWNER’S MANUAL STORAGE WARNING: Remove all fuel from fuel tank before storing generator. Store fuel in approved container. Store fuel in a well-vented area free of open flames or sparks. WARNING: The muffler becomes very hot during operation. The muffler remains hot for a while after shutdown. Let engine cool before storing. IMPORTANT: Keep generator level while in storage. Never store generator upside down or standing on end. Note: We supply the engine owner’s manual with generator.
R PORTABLE GASOLINE GENERATORS ELECTRICAL COMPONENT SPECIFICATIONS Resistance in Ohms Stator Stator Rotor Main Auxiliary Primary Winding * Winding Δ Winding † Model MGH8500AIE MGH10000C 0.41 0.33 .098 0.71 Capacitor, MFD 450 Volt Diodes (2) 800 Volt 45 60 8 Amp 8 Amp 7.81 8.53 * Connect T2 (green) and T3 (black). Measure resistance between T1 (red) and T4 (yellow). Δ Resistance between brown and white leads. † Remove diodes to check resistance.
OWNER’S MANUAL WIRING DIAGRAMS (Continued) Stator T3 T4 220/240V L1 110/120V Black Red L2 White 110/120V 120V, 30A Receptacle Stator Brown White 120V, 15A Receptacle Duplex GFCI Red Capacitor White 120V, 20A Receptacle White Wht Auxiliary Phase Diode Grn/ Ylw Wht Rotor HOT T2 LINE Grn/ Ylw Grn/ Ylw Diode Green/Yellow Red White Wht T4 Blue Red Black T3 T1 Red Green T1 T4 White WHITE T1 T3 Main Windings Green/ Yellow 120/240V 20A/30A Receptacle T2 Blk 120/24
R PORTABLE GASOLINE GENERATORS ILLUSTRATED PARTS LIST For Model MGH8500AIE Fuel Tank and Roll Cage 1 EL FU E F 3 4 SA FE TY INF OR MA TIO N 2 Unl eade d Gas olin eO nly 7 6 9 5 9 0V K 12 LOC IST TW 0V 12 0V 12 CI GF T SE RE ST TE 17 R TE ME UR HO 0V 0/24 CK 12 TLO IS TW 0V 0/24 CK 12 TLO IS TW M EN 05 00 00 1/10 00 HO UR 14 S LE -ID TO AU T SE RE ON T SE RE F OF 15 T SE RE T SE RE 16 14 15 8 16 14 13 11 11 12 12 10 15 14 18 117846
OWNER’S MANUAL ILLUSTRATED PARTS LIST For Model MGH8500AIE Fuel Tank and Roll Cage This list contains replaceable parts used in your generator. When ordering parts, follow the instructions listed under Replacement Parts on page 25 of this manual. KEY NO.
R PORTABLE GASOLINE GENERATORS ILLUSTRATED PARTS LIST 36 For Model MGH10000C Fuel Tank and Roll Cage 35 33 9 9 10 23 20 20 10 25 10 36 10 24 22 32 9 28 29 31 30 2 26 27 18 19 12 10 9 18 20 10 25 20 34 10 9 10 21 19 16 17 15 14 E L 10 F U 1 F 21 13 10 4 9 6 3 5 6 12 8 7 11 20 117846
OWNER’S MANUAL ILLUSTRATED PARTS LIST For Model MGH10000C Fuel Tank and Roll Cage This list contains replaceable parts used in your generator. When ordering parts, follow the instructions listed under Replacement Parts on page 25 of this manual. KEY NO.
R PORTABLE GASOLINE GENERATORS ILLUSTRATED PARTS LIST 5 4 For Model MGH8500AIE Control Panel 3 RE SE TE T ST 10 This list contains replaceable parts used in your generator. When ordering parts, follow the instructions listed under Replacement Parts on page 25 of this manual.
OWNER’S MANUAL ILLUSTRATED PARTS LIST 14 For Model MGH10000C Control Panel 2 This list contains replaceable parts used in your generator. When ordering parts, follow the instructions listed under Replacement Parts on page 25 of this manual. 19 2 3 6 18 16 1 RE SE TE T ST Res 12 0 et 11 Vol t 12 5 et Off Aut o Id le 7 12 15 20 9 0V p;t 8 Res et Res et Res et Res et E 00 NM 00 00 05 UR HO S 1/10 10 13 4 KEY NO.
R PORTABLE GASOLINE GENERATORS ILLUSTRATED PARTS LIST 1 2 For Models MGH8500AIE and MGH10000C Alternator Assembly This list contains replaceable parts used in your generator. When ordering parts, follow the instructions listed under Replacement Parts on page 25 of this manual. 3 5 6 7 12 11 13 16 10 8 9 15 17 14 PART NUMBER KEY NO.
OWNER’S MANUAL REPLACEMENT PARTS AND ACCESSORIES For original replacement parts and accessories, contact your nearest Authorized Dealer or Authorized Service Center for this product. If they can not supply the part or accessory, contact your nearest Parts Central listed below. Each Authorized Dealer, Authorized Service Center, and Parts Central is independently owned and operated. See pages 18 through 24 for an Illustrated Parts List.
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WARRANTY INFORMATION KEEP THIS WARRANTY Model Serial No. Date Purchased Always specify model and serial numbers when communicating with the factory. We reserve the right to amend these specifications at any time without notice. The only warranty applicable is our standard written warranty. We make no other warranty, expressed or implied. FIVE-YEAR LIMITED WARRANTY GASOLINE PORTABLE GENERATORS DESA Specialty Products™ makes no warranty with respect to the engine and engine components not of its manufacture.