R PORTABLE GASOLINE GENERATORS OWNER’S OPERATION AND INSTALLATION MANUAL Generator Models: HWI3000, MGH3000, MGH3000PR, MGH4000C, MGH4000CI, MGH5000D, MGH5000DI, MGH5000DIE, MGH6000D, MGH6000DI, MGH7000D, MGH7000DI, and MGH10000A 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.
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 PRODUCT IDENTIFICATION Continued 13. 14. E L U F 120 Volt Receptacle Full Power Selector Switch 120 Volt Receptacle (GFCI) 12 0 VO LT S RE SE TE T ST FU LL PO WE R 12 ON 0 LY 12 0 24 0V 120 Volt Receptacle (Duplex) 12 0/2 40 VO LT S EN 00 M 00 00 HO 05 UR RE SE S T 1/1 0 RE SE T Provision for Auto-Idle Switch Run Lamp Hour Meter Roll Cage 120/240 Volt Receptacle Circuit Breaker Gas Tank E L Choke Lever U 12. Control Panel F 11.
R PORTABLE GASOLINE GENERATORS GENERAL INFORMATION Master portable generators are rugged and compact. These models provide dependable, trouble-free service. The alternators are brushless with revolving fields. Honda gasoline engines provide long life under heavy use. Honda engines have overhead 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.
OWNER’S MANUAL SPECIFICATIONS MODEL Electrical Rated Wattage Rated Amperage 120 V 240 V Receptacle 120-V Duplex 120-V, 20-A Duplex 120-V, 15-A GFCI 120-V Twist-Lock 120/240-V Twist-Lock 120-V Full-Power Switch 120/240-V, 50-A Electrical Rated Wattage Rated Amperage 120 V 240 V MGH3000 MGH3000PR 2500 2500 2500 4000 5000 6000 20.8 –– 20.8 –– 20.8 33.3 16.7 41.7 20.
R PORTABLE GASOLINE GENERATORS FULL POWER SELECTOR SWITCH GENERATOR FEATURES OIL ALERT SYSTEM The oil alert system protects the engine from low oil damage. This system automatically 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.
OWNER’S MANUAL GENERATOR FEATURES Continued 2. If the GFCI receptacle tests okay, restore power by pushing the RESET button back in. The test lamp should work at this time. IMPORTANT: You must press the RESET button firmly and fully. It should lock into place. If the GFCI does not lock into place, do not use receptacle. Contact a qualified electrician for repairs. RECEPTACLE CIRCUIT BREAKER The circuit breakers protect the receptacles and alternator. Overloading generator will trip circuit breaker.
R PORTABLE GASOLINE GENERATORS HANDLES AND TOP COVER (Model MGH10000A) Follow the steps below to attach the handles and top cover to Model MGH10000A: 1. Remove the two bolts, lock nuts, and washers holding side panels to control panel end of roll cage. Insert bolts with washers through two holes in the handle and then back through roll cage and side screen panels (See Figure 8). Tighten the lock nuts against the side screen panels. 2.
OWNER’S MANUAL BATTERY Continued TO ENGINE BLOCK FUL L PO WE R 120 ON LY MOUNTING BATTERY TO GENERATOR 4. See engine owner’s manual for more information. Battery Mounting Bracket S 05 1/10 TO STARTER SOLENOID Figure 14 - Connecting Positive and Negative Cables to Battery (Model MGH7000D Shown) L TO STARTER SOLENOID TO ENGINE BLOCK E 3. UR FU 2. Secure battery to generator by battery hold-down system. This system consists of the battery mounting bracket, hook bolts, and nut (see Figure 12).
R PORTABLE GASOLINE GENERATORS STANDBY INSTALLATION TO HOME OR BUILDING 1. 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 could occur. 2. IMPORTANT: This generator will not power your entire home. Most home utility electric service is more than 60 amps. This will exceed generator output. Only power needed items during a power outage.
OWNER’S MANUAL OPERATION Model MGH10000A also has a 120/240V, 50-amp receptacle (see Figure 17). POWER CORD AND PLUG REQUIREMENTS GENERAL INFORMATION Model HWI3000 has only the 120V, 20amp duplex receptacle. 120V, 30-amp twist-lock receptacle • NEMA L5-30P plug • Three-wire, 30-amp cord 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.
R PORTABLE GASOLINE GENERATORS OPERATION 4. Continued 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 standing water and snow. Make sure area is wellvented. WARNING: Only responsible adults should use generator. Never let anyone operate generator without proper instructions.
OWNER’S MANUAL OPERATION Continued HONDA 6. ON OFF Engine Switch START Adjusting the Idle Speed ENGINE SW CIRCUIT BREAKER ON/push OFF Figure 24 - Engine Switch (Models MGH5000DIE, MGH7000D, MGH7000DI, and MGH10000A Only) Choke Lever (Open Position) IMPORTANT: Adjust the idle speed only: • If the idle speed becomes too high. • If the engine idle speed will not regulate (engine idles and speeds up again and again). 1. Turn Auto-Idle switch OFF. Start engine.
R PORTABLE GASOLINE GENERATORS Fuel Valve Lever (Off Position) OPERATION STOPPING ENGINE Continued HIGH ALTITUDE OPERATION IMPORTANT: The engine speed is preset. The throttle is locked in preset position. Do not adjust throttle. This generator will not perform well at high altitudes without proper adjustment. See engine owner’s manual for details. Follow the steps below to stop engine. 1. Remove all electrical loads from generator (see Disconnecting Electrical Loads).
OWNER’S MANUAL MAINTENANCE AND REPAIRS WARNING: Only a qualified electrical service person should service and repair the alternator on this generator. Use only factory approved replacement parts. CAUTION: The engine speed is preset. The throttle is locked in preset position. Do not adjust throttle. Preset position lets engine run at 3600 RPM under load. The engine must maintain 3600 RPM for generator to create correct voltage. Running engine at lower speeds will damage generator and powered items.
R PORTABLE GASOLINE GENERATORS ELECTRICAL COMPONENT SPECIFICATIONS Resistance in Ohms Stator Stator Rotor Rotor Main Auxiliary Primary Secondary Winding * Winding ∆ Winding † Winding † Model HWI3000 MGH3000, MGH3000PR MGH4000C, MGH4000CI MGH5000D, MGH5000DI MGH5000DIE MGH6000D, MGH6000DI MGH7000D, MGH7000DI MGH10000A 1.6 1.6 0.71 0.54 0.54 0.37 0.28 0.40 5.9 5.9 2.17 1.38 1.38 1.01 0.78 0.90 6.9 6.9 0.54 0.61 0.61 0.68 0.77 0.
OWNER’S MANUAL WIRING DIAGRAMS Continued Green/Yellow Green Black 120/240V 30A Receptacle 120V, 15A Receptacle 120V, 15A Receptacle 120V, 15A Receptacle Circuit Breaker 20A T2 Circuit Breaker 20A White White Circuit Breaker 30A Duplex Red GFCI White White Black HOT Circuit Breaker 30A T3 LINE Hour Meter T4 WHITE T1 White Yellow Green Black Black Red Black Black Red White White T1 Auxiliary Phase Main Windings Capacitor T4 T3 T2 T2 T1 T4 T3 Green Red Diode Black St
R PORTABLE GASOLINE GENERATORS WIRING DIAGRAMS Continued Green/Yellow Green Black 120/240V 30A Receptacle Switch • 120V, 15A Receptacle 120V, 15A Receptacle Duplex GFCI White Circuit Breaker 30A Red Circuit Breaker 30A Black T3 120V, 15A Receptacle Circuit Breaker 20A T2 Circuit Breaker 20A White White HOT T1 To Solenoid White WHITE s1 s2 LINE Hour Meter T4 Yellow White Green Black Black Red Black Black Red White White T1 Auxiliary Phase Main Windings Capacitor T4 T3
OWNER’S MANUAL TECHNICAL SERVICE REPLACEMENT PARTS You may have further questions about installation, operation, or troubleshooting. If so, contact DESA International’s Technical Service Department at 1-800-323-5190. Note: Use only original replacement parts. This will protect your warranty coverage for parts replaced under warranty. You can also visit DESA International’s technical service web site at www.desatech.com.
R PORTABLE GASOLINE GENERATORS ILLUSTRATED PARTS LIST 1a 2a For Models HWI3000, MGH3000, and MGH3000PR Alternator Assembly 1b This list contains replaceable parts used in your generator. When ordering parts, follow the instructions listed under Replacement Parts on page 19 of this manual. 7 2b 4 22 5 6 3 20 15 14 21 19 13 17 16 7 8 13 15 12 18 9 7 10 11 7 KEY NO.
OWNER’S MANUAL ILLUSTRATED PARTS LIST 23 For Models MGH4000C, MGH4000CI, MGH5000D, MGH5000DI, MGH5000DIE, MGH6000D, MGH6000DI, MGH7000D, and MGH7000DI Alternator Assembly 15 22 9 21 19 9 This list contains replaceable parts used in your generator. When ordering parts, follow the instructions listed under Replacement Parts on page 19 of this manual. 20 10 8 14 7 18 6 5 13 16 12 4 1 17 2 11 3 KEY NO.
R PORTABLE GASOLINE GENERATORS 19 ILLUSTRATED PARTS LIST 18 20 For Model MGH10000A Alternator Assembly 13 17 8 21 This list contains replaceable parts used in your generator. When ordering parts, follow the instructions listed under Replacement Parts on page 19 of this manual. 15 26 12 24 5 25 10 14 11 23 1 2 6 4 16 22 9 7 3 KEY NO. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 † DESCRIPTION Stator Rotor Draw Bolt Fan Balancing Disc Lifting Eyes D.E. Bracket N.
OWNER’S MANUAL ILLUSTRATED PARTS LIST 1 For Models HWI3000, MGH3000, and MGH3000PR Roll Cage This list contains replaceable parts used in your generator. When ordering parts, follow the instructions listed under Replacement Parts on page 19 of this manual. 2 3 4 3 4 3 7 4 3 3 4 5 6 6 8 5 5 9 4 3 4 3 4 7 3 3 106813 KEY NO.
R PORTABLE GASOLINE GENERATORS ILLUSTRATED PARTS LIST For Models MGH4000C, MGH4000CI, MGH5000D, MGH5000DI, MGH5000DIE, MGH6000D, MGH6000DI, MGH7000D, and MGH7000DI Fuel Tank and Roll Cage U F F E L 3 5 15 26 2 1 4 24 9 23 25 7 6 27 7 8 6 1 11 11 16 21 L E 14 16 16 17 11 16 18 13 19 24 22 16 13 2 12 F U 10 20 11 16 11 F 13 29 10 23 23 14 10 24 29 10 16 11 28 17 24 16 11 24 28 9 24 106813
OWNER’S MANUAL ILLUSTRATED PARTS LIST This list contains replaceable parts used in your generator. When ordering parts, follow the instructions listed under Replacement Parts on page 19 of this manual. For Models MGH4000C, MGH4000CI, MGH5000D, MGH5000DI, MGH5000DIE, MGH6000D, MGH6000DI, MGH7000D, and MGH7000DI Fuel Tank and Roll Cage KEY MGH4000C NO.
R PORTABLE GASOLINE GENERATORS ILLUSTRATED PARTS LIST 36 For Model MGH10000A Fuel Tank and Roll Cage 35 33 9 9 10 23 37 37 10 25 10 36 10 24 22 32 9 28 29 31 30 2 26 27 18 19 12 20 10 9 18 37 10 25 37 34 10 9 10 21 19 16 17 20 15 14 10 F U F E L 21 1 13 10 4 9 6 3 5 6 8 7 12 11 26 106813
OWNER’S MANUAL ILLUSTRATED PARTS LIST For Model MGH10000A 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 19 of this manual. 106813 KEY NO.
R PORTABLE GASOLINE GENERATORS ILLUSTRATED PARTS LIST For Models MGH4000C, MGH4000CI, MGH5000D, MGH5000DI, MGH5000DIE, MGH6000D, MGH6000DI, MGH7000D, and MGH7000DI Control Panel 2 12 2 5 1 3 6 RE SE TE T ST Re se t 12 0 8 Vo lt 4 This list contains replaceable parts used in your generator. When ordering parts, follow the instructions listed under Replacement Parts on page 19 of this manual.
OWNER’S MANUAL ILLUSTRATED PARTS LIST For Model MGH10000A Control Panel 2 This list contains replaceable parts used in your generator. When ordering parts, follow the instructions listed under Replacement Parts on page 19 of this manual. 14 2 6 16 1 3 Re 12 se 0 t RE SE TE T ST 11 Vo 12 lt Re 7 se t Au 4 to Off 5 Idle 5 On Se lect or 12 15 9 20 0V p;t Re 8 se Re se t t Re se Re t se E 00 NM 00 00 05 U HO t RS 1/10 13 10 4 KEY NO.
R PORTABLE GASOLINE GENERATORS ILLUSTRATED PARTS LIST For Solenoid and Control Board Assemblies and Mounting 12 10 13 6 14 7 8 10 11 9 8 Solenoid Assembly and Mounting 3 DE IN 5 TE RN AT IO NA L L2 L1 S1 S2 SA 4 2 1 Control Board Assembly and Mounting 30 106813
OWNER’S MANUAL ILLUSTRATED PARTS LIST For Solenoid and Control Board Assemblies and Mounting This list contains replaceable parts used in your generator. When ordering parts, follow the instructions listed under Replacement Parts on page 19 of this manual. KEY NO.
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. Note: The two-year limited warranty below covers all non-engine parts of this generator including the alternator. Honda warrants the engine.
