Technical Specifications Engine type: Two-stroke air-cooled single-cylinder engine Displacement: 58CC Total Mass: Without bar and chain 5.4kgs Power Output to ISO 7293: 2.5KW Idle Speed: 3000RPM Maximum Power Speed:11,500RPM Cylinder Bore:45.2MM Cylinder Stoke34MM Oil Tank Capacity: 0.26L Fuel Tank Volume:0.55L Cutting Attachments Guide bar size: 18" Chain Pitch: .325 Chain Gauge:058