ECHO PB-770H 234 MPH 756 CFM 63.3 cc Gas 2-Stroke X Series Backpack Leaf Blower with Hip ThrottlePower and convenience are key features of the X Series ECHO PB-770H gas leaf blower. This yard blower features a ventilated back pad that circulates air around the users back for comfortable operation, especially in hot weather. The 63.3 cc professional-grade engine delivers 756 CFM and 234 MPH at the pipe delivering a balanced combination of both air speed and air volume.Use a 50:1 ratio of fuel to oil mix for 2-stroke cycle engines, recommend using only fresh gas with a minimum octane rating of 89 or higher (mid-grade to premium) at all times50:1 ratio equal 1 US Gal. 89 octane plus 2.6 fl. oz. ECHO PowerBlend gold oil or ECHO red armor oilGas leaf blower features a 63.3 cc professional-grade 2-stroke engineLawn blower comes with a 5-year consumer/2-year commercial warrantyUnique vented back pad for hot weather and padded backrest/shoulder padsPosi-loc pipes provide secure connectionHip mounted throttle with cruise controlPowerful combination of air speed and air volumeAssembled dimension: 60 in. W x 23 in. D x 19 in. HSide-mounted dual-stage air filter is heavy-duty to help protect the engine from harmful debris and dustIncludes a leaf guard to help shield the blower from debrisClearing power rating 32 is best for clearing large debris, wet or dry leaves and grass clippings, recommended for commercial or large residential propertiesIncludes interchangeable nozzle connections for added versatilityAir speed of up to 234 MPH helps provide powerful bursts of airVariable-speed air control allows you to adjust the power settings according to your cleaning needsTranslucent fuel tank allows you to easily monitor the fuel levelAnti-vibration design helps reduce noise levels for quieter useMaximum air volume of up to 756 CFM helps make quick work of yard debrisDimensionsProduct Depth (in.)23 inProduct Height (in.)19 inProduct Width (in.)60 in