Honda E400

Honda E400 generatorThe Honda E400 is AC/DC portable generator with 400 VA of maximum power, 300W of rated power and 60Hz of rated frequency. The E400 generator is available with AC 120V and DC 12V rated voltage. The direct current terminals can be used for charging 12-volt automotive type batteries only.

The Honda E400 generator uses a single-cylinder gasoline engine (55.4 cc; 3.38 The engine has a side-valve (L-head) design flywheel magneto ignition system. The cylinder bore and the piston stroke are 42.0 mm (1.65 in) and 40.0 mm (1.57 in), respectively. The compression ratio rating is 5.5:1.

The engine produced 1.1 HP at 3,600 rpm of maximum horsepower and 0.8 HP at 3,600 rpm of rated power.

General information

Generator Specifications
Model Honda E400
Dimensions (L x W x H): 358 x 263 x 307 mm (14.1 x 10.4 x 12.1 in)
Dry weight 18.2 kg (40.1 lbs)
AC Rated voltage: 120V
AC Rated output: 300W
AC Maximum output: 300W
Rated frequency: 60 Hz
DC output: 100W
Fuel tank capacity 2.0 L (0.53 US gal, 0.43 Imp gal)
Displacement 55.4 cm3 (3.38 cu-in)
Bore x stroke 42.0 x 40.0 mm (1.65 x 1.57 in)
Max. horsepower
Max. torque
Carburetor Horizontal type, butterfly valve
Cooling system Forced-air
Ignition system Transistorized magneto ignition
Lubricating system Splash
Starting system Recoil starter
Stoping system Ignition primary circuit ground
Fuel used Unleaded gasoline (octane number 86 or higher)

Maintenance data

Oil system
Oil type Honda 4-stroke “SE”
Recommended oil 10W-30
Oil capacity 0.3 L (0.32 US pt., 0.26 Imp.qt.)
Ignition system
Spark plug NGK: CM-6
Spark plug gap 0.4 mm (0.016 in)
Author: Sergei Wers
About: Co-founder and CEO of a multi-brand auto repair shop (engine repair, chassis repair, body repair and painting) for over 15 years. I have been developing internet sites with technical specifications for more than seven years.

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We try to use official documentation and verify the published data, but errors may occur. In addition, specifications of machinery and equipment may vary depending on markets and modifications. We do not recommend the use of this data for spare parts or repairs. Use official service manuals or parts catalogs for your product.

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