Master HWI3000, MGH3000, MGH3000PR, MGH4000C, MGH4000CI, MGH5000D, MGH5000DI, MGH5000DIE, MGH6000D, MGH6000DI, MGH7000D, MGH7000DI, MGH Owner's Operation And Installation Manual
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Master HWI3000, MGH3000, MGH3000PR, MGH4000C, MGH4000CI, MGH5000D, MGH5000DI, MGH5000DIE, MGH6000D, MGH6000DI, MGH7000D, MGH7000DI, MGH Owner's Operation And Installation Manual

Master portable gasoline generator owner's operation and installation manual
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See also: Owner's Operating & Installation Manual
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.

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FRED
May 26, 2025

MGH6000D1, STARTS GOOD, RUNS WELL, CANNOT CHANGE SPEED, AC VOLTAGE, LOW ON RECEPTICLES ??

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Summary of Contents for Master HWI3000, MGH3000, MGH3000PR, MGH4000C, MGH4000CI, MGH5000D, MGH5000DI, MGH5000DIE, MGH6000D, MGH6000DI, MGH7000D, MGH7000DI, MGH

  • Page 1 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.

  • Page 2: Safety Information

    PORTABLE GASOLINE GENERATORS SAFETY INFORMATION WARNINGS IMPORTANT: Read this owner’s manual and the engine owner’s manual carefully. Become famil- iar with this generator before try- ing to operate or service it. Know its uses, limitations, and any haz- ards involved. Improper use of generator can cause severe in- jury or death from explosion, fire, burns, electrical shock, or car-...

  • Page 3: Product Identification

    Run Lamp Hour Meter 120/240 Volt Receptacle Circuit Breaker Choke Lever Fuel Valve Lever Starter Grip Engine Engine ON/ OFF Switch Figure 1 - Portable Generator (Model MGH4000C Shown) Provision for Auto-Idle Switch Roll Cage Gas Tank Ground Alternator Oil Dipstick...

  • Page 4: General Information

    PORTABLE GASOLINE GENERATORS GENERAL INFORMATION Master portable generators are rugged and compact. These models provide depend- able, 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 perfor- mance with lower fuel consumption.

  • Page 5: Specifications

    SPECIFICATIONS MODEL HWI3000 Electrical Rated Wattage 2500 Rated Amperage 120 V 20.8 240 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 General Honda Engine H.P. Honda Model GX160K1VX Fuel Type Gasoline...

  • Page 6: Generator Features

    PORTABLE GASOLINE GENERATORS 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.

  • Page 7: Engine Oil

    GENERATOR FEATURES Continued 2. If the GFCI receptacle tests okay, re- store 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.
  • Page 8 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).

  • Page 9: Extension Cords

    BATTERY Continued MOUNTING BATTERY TO GENERATOR 1. Secure battery to generator by battery hold-down system. This system con- sists of the battery mounting bracket, hook bolts, and nut (see Figure 12). Note: Model MGH10000A battery is located on opposite side as shown (see Figure 13).

  • Page 10: Standby Installation To Home Or Building

    PORTABLE GASOLINE GENERATORS STANDBY INSTALLATION TO HOME OR BUILDING WARNING: Have standby in- stallation performed by a skilled, licensed electrician. Do not let anyone else wire into a utility circuit. Personal injury, equip- ment damage, or damage to home could occur. IMPORTANT: This generator will not power your entire home.

  • Page 11: Operation

    OPERATION GENERAL INFORMATION 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.
  • Page 12 PORTABLE GASOLINE GENERATORS OPERATION 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 stand- ing water and snow. Make sure area is well- vented.
  • Page 13 OPERATION Continued HONDA START Engine ENGINE SW Switch CIRCUIT BREAKER ON/push OFF Figure 24 - Engine Switch (Models MGH5000DIE, MGH7000D, MGH7000DI, and MGH10000A Only) Choke Lever (Open Position) Figure 25 - Choke Lever Opened (Model MGH7000D Shown) AUTO-IDLE OPERATION IMPORTANT: Never start engine with elec- trical loads connected.

  • Page 14: High Altitude Operation

    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.

  • Page 15: Maintenance And Repairs

    MAINTENANCE AND REPAIRS WARNING: Only a qualified electrical service person should service and repair the alternator on this generator. Use only fac- tory approved replacement parts. CAUTION: The engine speed is preset. The throttle is locked in preset position. Do not adjust throttle.

  • Page 16: Electrical Component Specifications

    PORTABLE GASOLINE GENERATORS ELECTRICAL COMPONENT SPECIFICATIONS Model HWI3000 MGH3000, MGH3000PR MGH4000C, MGH4000CI MGH5000D, MGH5000DI MGH5000DIE MGH6000D, MGH6000DI MGH7000D, MGH7000DI MGH10000A * Connect T2 (green) and T3 (black). Measure resistance between T1 (red) and T4 (yellow). Resistance between brown and white leads. †...
  • Page 17 WIRING DIAGRAMS Continued Capacitor White Figure 33 - Wiring Diagram, Model MGH7000D • To Solenoid • Figure 34 - Wiring Diagram, Models MGH4000CI, MGH5000DI, MGH5000DIE, and MGH6000DI 106813 Green/Yellow 120/240V 30A Receptacle White Circuit Duplex Breaker White Black Circuit Breaker Hour Meter Yellow...
  • Page 18 PORTABLE GASOLINE GENERATORS WIRING DIAGRAMS Continued • To Solenoid Capacitor White Figure 35 - Wiring Diagram, Model MGH7000DI Auto-Idle Control Board Circuit Breaker White White Auto-Idle Solenoid Yellow Yellow Capacitor Figure 36 - Wiring Diagram, Model MGH10000A Green/Yellow 120/240V 30A Switch Receptacle White...

  • Page 19: Technical Service

    TECHNICAL SERVICE You may have further questions about in- stallation, operation, or troubleshooting. If so, contact DESA International’s Technical Service Department at 1-800-323-5190. You can also visit DESA International’s technical service site www.desatech.com. SERVICING THE ENGINE Honda parts and services should be handled by your nearest authorized engine service firm.

  • Page 20: Illustrated Parts List

    PORTABLE GASOLINE GENERATORS ILLUSTRATED PARTS LIST For Models HWI3000, MGH3000, and MGH3000PR Alternator Assembly This list contains replaceable parts used in your generator. When ordering parts, fol- low the instructions listed under Replace- ment Parts on page 19 of this manual. PART NUMBER DESCRIPTION...
  • Page 21 ILLUSTRATED PARTS LIST For Models MGH4000C, MGH4000CI, MGH5000D, MGH5000DI, MGH5000DIE, MGH6000D, MGH6000DI, MGH7000D, and MGH7000DI Alternator Assembly This list contains replaceable parts used in your generator. When ordering parts, follow the instructions listed under Re- placement Parts on page 19 of this manual.

  • Page 22: Parts List

    PORTABLE GASOLINE GENERATORS ILLUSTRATED PARTS LIST For Model MGH10000A Alternator Assembly 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. * Part not available by itself. Must purchase Alternator Assembly. ** Standard hardware item available from local hardware store.
  • Page 23 ILLUSTRATED PARTS LIST 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. 106813 PART NUMBER DESCRIPTION 105155-01 Roll Cage 099754-01...
  • Page 24 PORTABLE GASOLINE GENERATORS ILLUSTRATED PARTS LIST For Models MGH4000C, MGH4000CI, MGH5000D, MGH5000DI, MGH5000DIE, MGH6000D, MGH6000DI, MGH7000D, and MGH7000DI Fuel Tank and Roll Cage 106813...
  • Page 25 ILLUSTRATED PARTS LIST For Models MGH4000C, MGH4000CI, MGH5000D, MGH5000DI, MGH5000DIE, MGH6000D, MGH6000DI, MGH7000D, and MGH7000DI Fuel Tank and Roll Cage KEY MGH4000C MGH5000D MGH4000CI MGH5000DI MGH6000DI MGH7000DI MGH5000DIE 25954000 25954001 099832-01 107021-01 25978000 — HC4-8C — 099701-01 099701-01 19508001 19508001 25985005 25985005 099743-01...
  • Page 26 PORTABLE GASOLINE GENERATORS ILLUSTRATED PARTS LIST For Model MGH10000A Fuel Tank and Roll Cage 106813...
  • Page 27 ILLUSTRATED PARTS LIST For Model MGH10000A Fuel Tank and Roll Cage This list contains replaceable parts used in your generator. When ordering parts, fol- low the instructions listed under Replace- ment Parts on page 19 of this manual. 106813 OWNER’S MANUAL PART NUMBER DESCRIPTION...
  • Page 28 PORTABLE GASOLINE GENERATORS ILLUSTRATED PARTS LIST For Models MGH4000C, MGH4000CI, MGH5000D, MGH5000DI, MGH5000DIE, MGH6000D, MGH6000DI, MGH7000D, and MGH7000DI Control Panel This list contains replaceable parts used in your generator. When ordering parts, fol- low the instructions listed under Replace- ment Parts on page 19 of this manual. PART NUMBER FOR MODEL MGH5000D MGH4000C...
  • Page 29 ILLUSTRATED PARTS LIST For Model MGH10000A Control Panel This list contains replaceable parts used in your generator. When ordering parts, fol- low the instructions listed under Replace- ment Parts on page 19 of this manual. PART NUMBER † † Includes reference numbers 1 through 16 Not shown 106813 DESCRIPTION...
  • Page 30 PORTABLE GASOLINE GENERATORS ILLUSTRATED PARTS LIST For Solenoid and Control Board Assemblies and Mounting Control Board Assembly and Mounting Solenoid Assembly and Mounting 106813...
  • Page 31 ILLUSTRATED PARTS LIST For Solenoid and Control Board Assemblies and Mounting This list contains replaceable parts used in your generator. When ordering parts, fol- low the instructions listed under Replace- ment Parts on page 19 of this manual. PART NUMBER 100105-01 26499000 100321-01...

  • Page 32: Warranty Information

    WARRANTY INFORMATION 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.

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