
The Honda EM3800SX generator uses a single-cylinder Honda GX240 gasoline engine 242 cc (14.8 cu.in.). The engine has an overhead valve (OHV) design. The GX240 uses a horizontal carburetor with a butterfly valve and transistorized magneto ignition. The cylinder bore and the piston stroke are 73.0 mm (2.9 in) and 58.0 mm (2.3 in), respectively. The compression ratio rating is 8.2:1.
The GX240 produced 8.2 PS (6.0 KW; 8.0 HP) at 3,600 rpm of maximum horsepower and torque was 17.0 Nm (1.7 kg·m, 12 ft·lb) at 2,500 rpm.
General information
| Generator Specifications | ||
| Model | Honda EM3800SX | |
| Dimensions (L x W x H): | 1,040 x 691 x 721 mm (40.9 x 27.2 x 28.4 in) | |
| Dry weight | AC type (California type): 87.6 kg (193.1 lbs) AN type (Non-California type): 87.1 kg (192.0 lbs) | |
| AC Rated voltage: | 120/240V | |
| AC Rated output: | 3.3 KVA | |
| AC Maximum output: | 3.8 KVA | |
| AC Rated ampere: | 27.5/13.8A | |
| Rated frequency: | 60 Hz | |
| DC output: | Only for charging automotive battery of 12V up to 8.3A | |
| Fuel tank capacity | 25.0 liters (6.6 US gal, 5.5 Imp. gal) | |
| Engine | ||
| Engine model | Honda GX240 | |
| Displacement | 242 cm3 (14.8 cu-in) | |
| Bore x stroke | 73.0 x 58.0 mm (2.9 x 2.3 in) | |
| Max. horsepower | 8.0 HP (6.0 kW) at 3,600 rpm | |
| Max. torque | 17.0 Nm (1.7 kg·m, 12 ft·lb) at 2,500 rpm | |
| 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
| Engine | |
| Cylinder compression | 6.0-8.5 kg/cm2 (85-151 psi) at 600 rpm |
| Valve clearance | |
| Intake valve | 0.15 ± 0.02 (0.006 ± 0.001) |
| Exhaust valve | 0.20 ± 0.02 (0.008 ± 0.001) |
| Carburetor | |
| Float height | 13.2 mm (0.52 in) |
| Pilot screw opening | 2 |
| Oil system | |
| Oil type | Honda 4-stroke or an equivalent (SE or SF) |
| Recommended oil | SAE 10W-40, 10W-30 |
| Oil capacity | 1.1 L (1.16 US gal, 0.97 lmp qt) |
| Ignition system | |
| Ignition timing | 20 ° B.T.D.C (Fixed) |
| Spark plug | NGK: BPR5ES NIPPONDENSO: W16EPR-U |
| Spark plug gap | 0.7-0.8 mm (0.028-0.031 in) |
| Spark plug cap | 7.5-12.5 kΩ |
| Primary ignition coil resistance | 0.8-1.0 kΩ |
| Secondary ignition coil resistance | 5.9-7.1 kΩ |
| Ignition coil air gap | 0.4 ± 0.2 (0.016 ± 0.008) |
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