This high - performance chain saw, boasting a 7.8HP power output and a 19800R/MIN rotational speed, offers outstanding cutting efficiency for heavy - duty tasks. Its 550ML fuel tank and 260ML oil tank allow for extended use, with a 25:1 mixed fuel ratio ensuring optimal engine performance. The guide bar, crafted from high - quality steel and available in multiple sizes, provides durability and adaptability. A 51*40CM bore stroke contributes to stable, powerful operation, enhancing its reliability in tough work settings.