The Yamaha EF1000A is a 120V, single-phase, brushless, AC portable generator.
The Yamaha EF1000A generator uses a single-cylinder Yamaha MZ85 gasoline engine with 84 cc; (5.13 cu.in.) of displacement. The cylinder bore and the piston stroke are 50.0 mm (1.97 in) and 43.0 mm (1.69 in), respectively. The MZ85 engine produced 2.0 PS (1.5 KW; 2.0 HP) at 3,600 rpm of maximum horsepower.
General information
| Generator Specifications | |
| Model | Yamaha EF1000A |
| Dimensions (L x W x H): | 399 x 305 x 410 mm (15.7 x 12.0 x 16.1 in) |
| Dry weight (without tines) | 23.0 kg (50.7 lbs) |
| AC Rated voltage: | 120V |
| AC Rated output: | 0.8 KVA (800 watts) 6.7A |
| AC Maximum output: | 0.8 KVA (800 watts) 6.7A |
| AC Cycles: | 60 Hz |
| DC output: | – |
| Fuel tank capacity | 3.8 L (1 US gal, 0.8 Imp. gal) |
| Engine | |
| Engine model | Yamaha MZ85 |
| Displacement | 84 cm3 (5.13 cu-in) |
| Bore x stroke | 50.0 x 43.0 mm (1.97 x 1.69 in) |
| Max. horsepower | 2.0 PS (1.5 kW, 2.0 HP) at 3600 rpm |
| Max. torque | – |
| Carburetor | Horizontal type, butterfly valve |
| Cooling system | Forced-air |
| Starting system | Recoil starter |
| Stoping system | – |
| Fuel used | Unleaded gasoline (octane number 86 or higher) |
| Oil system | |
| Lubricating system | Splash type |
| Oil type | YAMALUBE 4 or API SE |
| Recommended oil | 10W-30 |
| Oil capacity | 0.43 liters (0.45 US.qts, 0.38 Imp. qts) |
| Ignition system | |
| Ignition system | CDI |
| Spark plug | NGK BPR6HS |
| Spark plug gap | 0.6-0.7 mm (0.024-0.028 in) |
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