Parameter: Model: HL-YJ38 Max cutting diameter: 355/405/455mm(14?/16?/18?) Engine:1 Cylinder,2 Stroke,air-cooling Displacement:37.2cc Rated output power/Relevant speed:1200W/7000rpm Idle speed:2600rpm Oil/Fuel mixture ratio:1:25 Fuel tank capacity:310ml Oil tank capacity:210ml Chain pitch:3/8 inch Gauge:0.05?