Diesel Generators

GMG carries a variety of Military Diesel Generators, ranging from 2kW to 10kW. We can also procure, on a personal-basis, units that range up to 100kW in size. All the units we sell are:

• Rated for continuous-duty use
• Diesel-powered
• Undergo our rigorous refurbishment and testing program
• MIL-SPEC units (not consumer)
• Warranted for 90 days or 100 hours of use
• Qualified for 10% off parts for life
• Capable of being shipped globally
• Well-documented with FREE military generator manuals on our website

Below are more details and specifications for the units that we stock and have ready-access to. These are the best diesel generators that money can buy. The US military spares no expense and never sacrifices quality. These units represent the Best Value Diesel Generators in the world. If you purchase a unit from GMG, you will not be disappointed. We are committed to supplying spare parts for all the military diesel generators we sell, especially to customers who purchase complete units. Please do not hesitate to contact us with any questions you may have.

MEP-003A:  10 (12.5) kW continuous-run diesel generator powered by a 4 cylinder air-cooled 1800 rpm Onan engine

FREE MEP-003A Military Diesel Manuals can be found here

Compare the differences between the MEP-002A and MEP-003A parts

• Continuous Power Rating:  10 Kilowatt (kW), 60hz at 80% power factor below 5,000 feet above sea level. (The US Military underrates their units by at least 25%.)
• Current Type:  Alternating Current (AC)
• Line to Line Voltage (Volts):  120 and 240 volts
• Amp Output:  83.2 amps (assumes 120 volt output and 10,000 watt rating. The US Military underrates their units by at least 25%.  If you assume 12,500 watts and 120 volt output, you arrive at 104 amps.
• Voltage:  120V (single phase, 2 wire), 120/240V (single phase, 3 wire), 120/208V (3-phase, 4 wire)
• Phases:  Single AND Three on-the-fly
• Fuel Type:  Diesel (Bio-diesel retrofits are possible assuming 1) the bio-diesel is preheated properly and 2) the bio-diesel is of high quality and purity)
• # of Cylinders:  4
• RPM:  1,800  (Note that most consumer units run hot and fast at 3,600 RPMs are not capable of continuous use.)
• Engine Manufacturer:  Onan (now Cummins Onan – a world leader in diesel engine technology)
• Engine Type:  Four Cycle
• Displacement:  140 cubic inches (2294 cc.)
• Compression Ratio:  19:1
• Horsepower:  17.8 @ 1800 RPM (0-5000 ft above sea level)
• Governor:  Internal flyball; external adjustment
• Cooling Method:  Air-Cooled (i.e. not liquid-cooled; no water pump, radiator or coolant needed which radically reduces maintenance costs)
• Excitor Type:  Self-Excited
• Body Material:  Steel
• Radio Interference Suppression:  Included/Yes (just in case!)
• Fuel Filters:  Tank fuel strainer for large particulates; followed by in-line strainer; followed by dual in-line redundant fuel filters (easily replaced with Napa parts)
• Fuel Pumps:  Three redundant electric fuel pumps (one is for auxiliary fuel source such as a 55 gallon drum); one master mechanical injector pump.
• Air Filter:  Large and easily replaceable air filter with cold-weather intake diverter. You can switch from normal air filtration to the cold-weather setting that will suck air in over the exhaust manifold to pre-heat the air. This is an excellent cold weather feature.
• Cold Weather Kit:  Includes:  air intake pre-heat, glow plugs, 24 volt cold weather starting system. You will not find more durable cold-weather features in any unit on the market.
• Fuel Tank Capacity:  12.5 gallons
• Lubricating Oil Capacity (Less Filter):  3 quarts, 4 quarts if filter is changed (2.8 liters, 3.7 liters if filter is changed)
• Ventilation requirements (Total):  1350 CFM at 1800 RPM
• MEP003A Dimensions (Without ASK):
  • overall length 62 in. (157.5 cm.)
  • overall width 32in. (81.3 cm)
  • overall height 37in. (94 cm.)
  • net weight empty 1220 lbs. (553.4 kg.)
  • net weight filled 1360 lbs. (616.9 kg.)
• MEP003A Dimensions (With ASK Installed):
  • overall length 69 in. (175.5 cm.)
  • overall width 36 in. (91.3 cm)
  • overall height 39 in. (99 cm.)
  • net weight empty 1365 lbs. (619.4 kg.)
  • net weight filled 1505 lbs. (683.9 kg.)

MEP-002A:  5 (6.5) kW continuous-run diesel generator powered by a 2 cylinder air-cooled 1800 rpm Onan engine

FREE MEP-002A Military Diesel Manuals can be found here

Compare the differences between the MEP-002A and MEP-003A parts

• Continuous Power Rating:  5 Kilowatt (kW), 60hz at 80% power factor below 5,000 feet above sea level. (The US Military underrates their units by at least 25%.)
• Current Type:  Alternating Current (AC)
• Line to Line Voltage (Volts):  120 and 240 volts
• Amp Output:  41.6 amps (assumes 120 volt output and 5,000 watt rating. The US Military underrates their units by at least 25%.  If you assume 6,250 watts and 120 volt output, you arrive at 52 amps.
• Voltage:  120V (single phase, 2 wire), 120/240V (single phase, 3 wire), 120/208V (3-phase, 4 wire)
• Phases:  Single AND Three on-the-fly
• Fuel Type:  Diesel (Bio-diesel retrofits are possible assuming 1) the bio-diesel is preheated properly and 2) the bio-diesel is of high quality and purity)
• # of Cylinders:  2
• RPM:  1,800  (Note that most consumer units run hot and fast at 3,600 RPMs are not capable of continuous use.)
• Engine Manufacturer:  Onan (now Cummins Onan – a world leader in diesel engine technology)
• Engine Type:  Four Cycle
• Displacement:  70 cubic inches (1147 cc.)
• Compression Ratio:  19:1
• Horsepower:  8.9 @ 1800 RPM (0-5000 ft above sea level)
• Governor:  Internal flyball; external adjustment
• Cooling Method:  Air-Cooled (i.e. not liquid-cooled; no water pump, radiator or coolant needed which radically reduces maintenance costs)
• Excitor Type:  Self-Excited
• Body Material:  Steel
• Radio Interference Suppression:  Included/Yes (just in case!)
• Fuel Filters:  Tank fuel strainer for large particulates; followed by in-line strainer; followed by dual in-line redundant fuel filters (easily replaced with Napa parts)
• Fuel Pumps:  Three redundant electric fuel pumps (one is for auxiliary fuel source such as a 55 gallon drum); one master mechanical injector pump.
• Air Filter:  Large and easily replaceable air filter with cold-weather intake diverter. You can switch from normal air filtration to the cold-weather setting that will suck air in over the exhaust manifold to pre-heat the air. This is an excellent cold weather feature.
• Cold Weather Kit:  Includes:  air intake pre-heat, glow plugs, 24 volt cold weather starting system. You will not find more durable cold-weather features in any unit on the market.
• Fuel Tank Capacity:  6.75 gallons
• Lubricating Oil Capacity (Less Filter):  3 quarts, 4 quarts if filter is changed (2.8 liters, 3.7 liters if filter is changed)
• Ventilation requirements (Total):  1350 CFM at 1800 RPM
• MEP002A Dimensions (Without ASK):
  • overall length 51 in. (129.5 cm.)
  • overall width 32in. (81.3 cm)
  • overall height 37in. (94 cm.)
  • net weight empty 960 1bs. (435.5 kg.)
  • net weight filled 1040 1bs. (471.7 kg.)
  • cubage 35 cubic feet
• MEP002A Dimensions (With ASK Installed):
  • overall length 58 in. (147.4 cm.)
  • overall width 36 in. (91.3 cm)
  • overall height 39 in. (99 cm.)
  • net weight empty 1084 lbs. (492.2 kg.)
  • net weight filled 1164 lbs. (528.5 kg.)
  • cubage 46 cubic feet

MEP-802A:  5 (6.5) kW continuous-run diesel generator TQG (Tactical Quiet Generator)

FREE MEP-802A Military Diesel Manuals can be found here

• Identification Data:
  • Description: 5 kW TQG, 60 Hz, DED, Skid Mtd 5 kW TQG, DED
  • NSN: 6115-01-274-7387
  • LIN: G11966
  • Specification: MIL-DTL-53133/1
  • SSN: M53500
  • Trailer mounted configurations: PU- 797A: Figure A-6; AN/MJQ- 35A: Figure A-7 and; AN/MJQ-36: Figure A-8
• Physical Characteristics:
  • Dimensions LWH (in) 51 x 32 x 37 (Cube: 34 ft3)
  • Wet Weight (lbs) 800 empty, 868 full with batteries
  • Engine: Onan DN2M Diesel, 2 cylinder/4 stroke, 11.0hp @1800 RPM, 24VDC start, liquid-cooled.
  • Instrumentation: Hour meter, voltmeter, frequency, amps (% RL), oil pressure, fuel, coolant temp, battery amps, emergency stop, battle short
  • Fuels: Diesel DL-1, DL-2; Jet Fuel JP-8
  • Fuel tank: 5 gallons

• Performance Characteristics:
  • Power Rating 5kW, 0.8 pf @ 4000ft/120°F; 110% Max Power; De-rate: 3.5%/1000 ft from 4000 to 8000 ft
  • Environmental Capability: -25°F (-50°F with Winterization Kit) to 125°F, rain, humidity, altitude, sand/dust, transportation, cold storage: -60°F, salt spray, fungus, 15° incline.
  • Protective Devices: Automatic shut down with emergency bypass for low oil pressure, coolant high-temp, no fuel, and over-voltage.
  • Fuel Consumption: 0.57 gph @ rated load.
  • Human Factors: MIL-STD-1474.
  • Noise: 70 dBA @ 7 meters (23 ft).
  • Reliability: (MTBF) 486 hr @ 80% LCL
  • Maintenance Ratio less than 0.05
• Electrical Characteristics:
  • Connection: 120/240V, 1ph, 3 wire; 120V, 1ph, 2 wire; 120/208V, 3ph, 4 wire
  • Voltage Adj Range: 228 –252 V; 114 – 126 V;  205 –220 V
  • Frequency Adj Range: ±3%
  • Electrical: Drip-proof generator enclosure, fungus & moisture treated, solid state voltage regulator, brushless rotary exciter, solderless connectors, 60Hz: Onan alternator, 4 pole; Convenience receptacle on 60Hz set.

MEP-701A:  3 (3.75) kW continuous-run diesel generator powered by a 1 cylinder air-cooled 3600 rpm Onan engine

The MEP-701A series generator is perfect for home & business owners looking for an inexpensive and reliable source of backup power.  It is extremely efficient on diesel fuel consumption.  The MEP-701A unit is essentially a MEP-016B unit with an Accoustic Suppression Kit (ASK). As a more economically priced alternative to the MEP-002A & MEP-003A series generators, these smaller units are still built for continuous operation and offer many of the features found on the larger units. They are extremely portable as well. Engineered for severe-duty use, these generators are extremely well designed, and like all military equipment, are over-built  to run 24×7 in any weather or condition. All framing, output and control box, battery trays, etc. are made of aluminum leaving very little to left to rust. This MEP-701a features an acoustic suppression kit, a single cylinder Onan diesel engine, auxiliary fuel pump, glow plugs, electric start, adjustable output voltage, output gauges and much more.

• Glow plugs
• 24V electrical system (Brand new 4HN Battery)
• User selectable power configuration (120/240/208)
• Electric Start
• Easy access oil drain valve
• All new filters (oil/fuel/air)
• Aluminum tactical skid mounted
• Center mount lift hook
• Dual fuel pumps (for external fuel source)
• High / Low oil pressure shutdown
• Acoustic Suppression Kit (ASK) for quieter operation
• Designed to withstand all weather & climates
• Two 120V convenience outlets on front panel

MEP-016D:  3 (3.75) kW continuous-run diesel generator powered by a 1 cylinder air-cooled 3600 rpm Yanmar engine

FREE MEP-016D Military Diesel Manuals can be found here

The MEP-016D series generator is perfect for home & business owners looking for an inexpensive and reliable source of backup power.  It is extremely efficient on diesel fuel consumption.  The MEP-016D unit is essentially a MEP-016A  unit (an older gas model) that has been fully upgraded to a Yanmar L70 single cylinder diesel engine.  These engines are extremely efficient and make these units one of the most efficient units on the market. As a more economically priced alternative to the MEP-002A & MEP-003A series generators, these smaller units are still built for continuous operation and offer many of the features found on the larger units. They are extremely portable as well. Engineered for severe-duty use, these generators are extremely well designed, and like all military equipment, are over-built  to run 24×7 in any weather or condition. All framing, output and control box, battery trays, etc. are made of aluminum leaving very little to left to rust. This MEP-016D features a Yanmar L70 diesel engine, auxiliary fuel pump, glow plugs, electric start, adjustable output voltage, output gauges and much more. Note:  Many MEP-016D units still retain their former MEP-016A nameplates.  Sometimes the nameplate is also scratched off, replaced with the MEP-016D model name. The former MEP-016A units are all gas units. Any unit with a much newer and more efficient Yanmar engine are MEP-016D units.

• Glow plugs
• Pull-start (no battery needed!)
• User selectable power configuration (120/240/208)
• Easy access oil drain valve
• All new filters (oil/fuel/air)
• Aluminum tactical skid mounted
• Center mount lift hook
• Dual fuel pumps (for external fuel source)
• High / Low oil pressure shutdown
• Designed to withstand all weather & climates
• Two 120V convenience outlets on front panel

MEP-531A:  2 (2.25) kW continuous-run diesel generator powered by a 1 cylinder air-cooled 3600 rpm Yanmar engine

FREE MEP-531A Military Diesel Manuals can be found here

Since 1996 Dewey Electronics has been manufacturing and supplying the standard 2kW Military Tactical Generator to the US Department of Defense’s PM-Mobile Electric Power (PM-MEP).  This is the sipper of all sippers that we offer at GMG and only consumes .333 gallons per hour at 75% load.  This is also the most portable of all of GMG units, weighing in at 152 pounds (full of fuel).  The MEP-531A generator utilizes a current Yanmar air-cooled engine. Parts are readily available.  These units are excellent for extreme portability and fuel conservation.  They are desirable for truck-mounted systems, very remote off-grid living, or home-standby if space is a major concern. These compact, portable, highly reliable, lightweight units are available with either 120V AC or 28V DC output and have established themselves as the mainstay of portable power for military applications worldwide. Their open frame configuration allows them to be easily lifted, stacked, or transported by any military vehicle. This open configuration contributes to the ease of maintenance for which these units are noted. Equipped with a manual recoil starter and the ability to be electrically started from their NATO Slave Connector, these units are used throughout the military where pure military power is a requirement or when portability is a necessity.

• Generator Set:
  • Manufacturer: Dewey
  • Model: MEP-531A
  • NSN: 6115-01-435-1565
  • Dewey Part Number: 95-531
  • Output Voltage: 120V AC
  • Output Power: 2.0 kW @ 4000 ft/ 95°F
  • Frequency (Hz): 60
  • Speed (RPM): 3600 to 3750
  • Phase: 1
• Fuel:
  • Fuel Capacity (Gal): 1.6
  • Fuel Consumption (GPH): 0.333 gal/hr @ 75% full load
  • Fuel Requirement: Diesel-1, Diesel-2, or JP-8
• Dimensions:
  • Length (in): 29.5
  • Width (in): 16
  • Height (in): 21.7
  • Volume (ft3): 5.9
  • Weight (lb): Dry: 123.5
  • Weight (lb): Wet (with 4 hrs fuel): 152
• Engine:
  • Manufacturer: Yanmar
  • Model: L48AE-DEG
  • Type: 4 Cycle
  • Cylinders: 1 vertical
  • Cooling: Air
  • Displacement: 12.88 cubic inches (0.21L)
  • Horsepower: 4.2 @ 3600 RPM
  • Compression: 19.9:1
  • Starting System: Manual recoil pull starter/ 24 V DC electrical via NATO Slave Receptacle
  • Decompression System: Manual type with auto-return lever
• Alternator:
  • Manufacturer: Baldor
  • Type: Brush
• Electrical Characteristics:
  • Voltage Connections: 120V AC, Single Phase, 2 Wire
  • Voltage Adjustment: 114 -126V AC
  • Terminals: Split Lug Load Terminals (L/N)
  • Receptacle: GFCI Duplex 15 Amp
• Protective Devices:
  • Circuit Breaker: Overload/short circuit trip/engine shutdown (120V @ 20 Amps)
  • Low Oil Pressure Switch: Less than 15 psi/engine shutdown
• Instrumentation:
  • Voltmeter: 100-130 V AC, +/- 3%
  • Ammeter: 0-125 % of rated load, +/- 5% rated load
  • Frequency: 55-65 Hz +/- 1% rated frequency
  • Hour Meter: Electro-mechanical
• Performance Characteristics (Per Mil-Std-633):
  • Noise: 79 dBA @ 7 meters (23 ft)
  • Humidity: 0 -100%
  • Fungus: Drip proof electronics enclosure
  • Salt Spray: 5% Salt Solution
  • Sand/Dust: 1.4 g/m3 32.2km/h (20 mph)
  • Solar Radiation: 355 BTUs/ft2 per hour
  • Storage Temperatures: -65°F to 160°F
  • Rain: 100 mm (3.9 in)/ hr (3 hours exposure last hour operational per Mil-Std-705, ™ 608.1)
  • EMIC: Mil-Std-461C
• Operating Environment:
  • Temperature Range Nominal: -25°F to 120°F (-32°C to 49°C)
  • Temperature Range Extreme Cold: -46°F (starting -40°F)
  • Temperature Power Derating: 3%/18°F above 95°F
  • Altitude: Sea level to 8000 ft
  • Altitude Power Derating: 3.5%/1000ft above 4000 ft
  • Inclination: 15° Max.

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