Rated output power (kW): 5.0 Max output power (kW):5.5 Rated rotation speed (rpm): 3000 DC output: 12V8A Power factor cos: 1.0 Phase number: single Noise level dB (A)/4m (zero load-full load):  70-74 Fule tank[L]:23 Engine model:WG390 Engine type: 4-stroke air cooled.OHV Displacement [cc]: 389 Compression ratio: 8.5:1 Rated power [(HP/rpm]: 13/3600 Rated rotation speed (rpm): 3600 T.C.I:with Spark plug:F6RTC  Starting system:RECOIL or electric Rotation direction (view from flywheel): clockwise Fuel type: Automotive Unleaded Gasoline Lube oil brand: SAE10W30 (above CC grade) Low oil alarm system :with. Overall dimensions [mm] ( L x W x H ): 645x540x640 N.W/G.W[Kg]: 88/89.