The STIHL 070-090 series represents a line of robust and powerful two-stroke gasoline-powered tools, designed for demanding professional applications. These models, typically featuring displacements around 100-115 cc and producing approximately 6.0-7.0 horsepower, are engineered for reliability and performance in heavy-duty tasks. Key operational features include an anti-vibration system for user comfort and an inertia-activated chain brake for enhanced safety. While specific production years are not detailed, this series is recognized for its enduring quality and capability in challenging environments.

This Workshop Service Manual provides comprehensive guidance for the maintenance and repair of the STIHL 070-090 series tools. It covers essential areas such as engine specifications, including carburetor adjustments and ignition system details, as well as transmission information for the direct drive system with a centrifugal clutch. Maintenance procedures, including fuel/oil mix ratios, spark plug specifications, and air filter care, are detailed to ensure optimal performance and longevity. Technical specifications for dimensions, weight, and cutting capabilities, along with information on safety features like the chain brake, are also included to assist owners and technicians.