R PORTABLE GASOLINE GENERATORS OWNER’S OPERATION AND INSTALLATION MANUAL Generator Models: MGR2900, MGR4500I, and MGR6000I 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 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. DANGER: Carbon monoxide poisoning may lead to death! Engine exhaust contains poisonous carbon monoxide gas.
OWNER’S MANUAL SAFETY INFORMATION Continued 9. 13. 14. 114716 F 12. Gas Cap/Fuel Gauge E 11. Gas Tank EL FU 10. Only a qualified electrical service person should service and repair generator. • Generator produces high voltage. Use extreme caution when working on electrical parts. • Always remove spark plug wire from spark plug before servicing. This will prevent accidental starting. • When working on generator, avoid hot muffler, exhaust manifold, and engine parts. Severe burns may occur.
R PORTABLE GASOLINE GENERATORS GENERAL INFORMATION Master portable generators are rugged and compact. These generators use brushless alternators for dependable, trouble-free service. Robin’s gasoline engines provide long life under heavy use. 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 MGR2900 MGR4500I MGR6000I 2500 4500 6000 20.8 –– 37.5 18.8 50 25 –– Yes –– –– –– Yes Yes 30 Amp 20 Amp Yes Yes Yes 30 Amp 30 Amp Yes 6 EX170-D52010 Gasoline 3.9 qt. Yes Recoil 85.5 9 EX270-0638T Gasoline 8 gal. Yes Recoil 135 11.5 EH360-0644T Gasoline 8 gal.
R 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. 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 7).
OWNER’S MANUAL GENERATOR FEATURES Continued RECEPTACLE CIRCUIT BREAKER The circuit breakers protect the receptacles and alternator. Overloading generator will trip circuit breaker. A short circuit in item being powered will also trip 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.
R E FU PORTABLE GASOLINE GENERATORS L E F EXTENSION CORDS 5. Only use grounded extension cords. Be sure to use extension cord with proper wire gauge size. See chart below. Recommended Minimum Wire Gauges (AWG) for Extension Cords Ampere Load 2 3 4 5 6 8 10 12 14 16 20 AWG for Length of Cord in Feet 50' 100' 150' 18 18 16 16 16 16 16 14 14 12 10 18 18 16 16 16 14 14 14 12 12 10 18 18 16 16 14 12 12 12 10 10 8 GENERATOR GROUNDING You must supply the ground wire and grounding point.
OWNER’S MANUAL 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.
R PORTABLE GASOLINE GENERATORS 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 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.
OWNER’S MANUAL 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 well-vented. WARNING: Only responsible adults should use generator. Never let anyone operate generator without proper instructions. Note: If oil level is too low, oil alert system will keep engine from starting (see Oil Alert System, page 6).
E F R PORTABLE GASOLINE GENERATORS 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 15). 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.
OWNER’S MANUAL 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.
R PORTABLE GASOLINE GENERATORS 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.
OWNER’S MANUAL ELECTRICAL COMPONENT SPECIFICATIONS Resistance in Ohms Stator Stator Rotor Rotor Capacitor, Main Auxiliary Primary Secondary MFD Winding * Winding ‡ Winding † Winding † 450 Volt Model MGR2900 MGR4500I MGR6000I 1.6 0.835 0.741 5.9 1.852 1.582 6.9 4.91 5.55 1.33 — — Diodes (2) 1000 Volt 16 40 40 6 Amp 8 Amp 8 Amp * Connect T2 (green) and T3 (black). Measure resistance between T1 (red) and T4 (yellow). ‡ Resistance between brown and white leads. † Remove diodes to check resistance.
R PORTABLE GASOLINE GENERATORS WIRING DIAGRAMS Continued Stator T1 T2 T3 T4 220/240V L1 110/120V Black Black L2 White 110/120V 120V, 30A Receptacle Stator Brown Red White 120V, 20A Receptacle 120V, 15A Receptacle Duplex GFCI Capacitor White Green/Yellow Diode Red Red White Black T3 T4 T3 Green/ Yellow T2 Green Blk 120/240V 20A/30A Receptacle Main Windings T1 Red T1 Red T4 Blue Wht LINE Grn/ Ylw Grn/ Ylw Rotor Diode Grn/ Ylw Wht Auxiliary Phase HOT Wht WHITE
OWNER’S MANUAL ILLUSTRATED PARTS LIST 1 7 For Model MGR2900 Alternator Assembly 2 This list contains replaceable parts used in your generator. When ordering parts, follow the instructions listed under Replacement Parts on page 23 of this manual. 4 22 5 6 3 20 13 15 14 21 19 17 16 7 8 13 15 12 9 7 18 10 11 7 KEY NO.
R PORTABLE GASOLINE GENERATORS ILLUSTRATED PARTS LIST 1 2 For Models MGR4500I and MGR6000I Alternator Assembly This list contains replaceable parts used in your generator. When ordering parts, follow the instructions listed under Replacement Parts on page 23 of this manual. 3 5 6 7 12 11 13 16 10 8 9 15 17 14 PART NUMBER FOR MODEL KEY NO.
OWNER’S MANUAL ILLUSTRATED PARTS LIST 1 For Model MGR2900 Roll Cage This list contains replaceable parts used in your generator. When ordering parts, follow the instructions listed under Replacement Parts on page 23 of this manual. 2 3 2 3 3 2 4 5 2 6 2 3 KEY NO. PART NUMBER DESCRIPTION 1 2 3 4 5 6 114673-01 NEC-5C 103289-02 * WLE-5 115388-01 Roll Cage Lock Nut, 5/16-18 Shock Mount Bolt, 5/16-18 x 1/2" Lock Washer, 5/16" Grounding Strap * Available at any hardware store. 114716 19 QTY.
R PORTABLE GASOLINE GENERATORS ILLUSTRATED PARTS LIST For Models MGR4500I and MGR6000I Fuel Tank and Roll Cage 1 EL FU E F 10 9 SA FE TY INF OR MA TIO N 2 3 4 Un lead ed Gas olin eO nly 7 15 6 16 5 17 15 16 8 15 14 17 12 13 12 11 13 16 15 10 18 0V K 12 OC ISTL TW 0V 12 0V 12 I GFC T SE RE ST TE 0V 0/24 CK 12 TLO IS TW R TE ME UR HO M EN 05 00 00 1/10 00 HO UR S E AG LT VO 0 12 LY ON 0 12 + 0 24 R CTO LE SE LE -ID TO AU T SE RE ON T SE RE OFF T SE RE T SE RE 20 1147
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 23 of this manual. For Models MGR4500I and MGR6000I Fuel Tank and Roll Cage KEY NO.
R PORTABLE GASOLINE GENERATORS ILLUSTRATED PARTS LIST 5 4 3 RE SE TE T ST For Models MGR4500I and MGR6000I Control Panel 10 This list contains replaceable parts used in your generator. When ordering parts, follow the instructions listed under Replacement Parts on page 23 of this manual.
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 17 through 22 for an Illustrated Parts List.
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.
