This manual covers the Stihl HS81 and HS86 series, robust hedge trimmers engineered for demanding landscaping tasks. These tools are designed with powerful 2-stroke gasoline engines, featuring displacements of 37.7 cm³ for the HS81 and 40.2 cm³ for the HS86, delivering approximately 1.7 kW and 1.9 kW respectively. Their construction emphasizes reliability and performance, with features like a swiveling rear handle for enhanced maneuverability and available blade lengths of 24 and 30 inches to suit various cutting needs. The approximate weight, without fuel, is 5.4 kg for the HS81 and 5.6 kg for the HS86, making them manageable for extended use.

The purpose of this service manual is to provide comprehensive guidance for the maintenance, repair, and operation of the Stihl HS81 and HS86 hedge trimmers. It details essential procedures, including fuel mixture requirements, spark plug specifications, air filter maintenance, and blade sharpening. Technical specifications such as engine idle speed and blade stroke rate are included to aid in proper adjustment and troubleshooting. This manual serves as an indispensable resource for owners, technicians, and mechanics to ensure the longevity, optimal performance, and safe operation of these professional-grade tools.

This manual covers the Stihl HS81 and HS86 series, robust hedge trimmers engineered for demanding landscaping tasks. These tools are designed with powerful 2-stroke gasoline engines, featuring displacements of 37.7 cm³ for the HS81 and 40.2 cm³ for the HS86, delivering approximately 1.7 kW and 1.9 kW respectively. Their construction emphasizes reliability and performance, with features like a swiveling rear handle for enhanced maneuverability and available blade lengths of 24 and 30 inches to suit various cutting needs. The approximate weight, without fuel, is 5.4 kg for the HS81 and 5.6 kg for the HS86, making them manageable for extended use.

The purpose of this service manual is to provide comprehensive guidance for the maintenance, repair, and operation of the Stihl HS81 and HS86 hedge trimmers. It details essential procedures, including fuel mixture requirements, spark plug specifications, air filter maintenance, and blade sharpening. Technical specifications such as engine idle speed and blade stroke rate are included to aid in proper adjustment and troubleshooting. This manual serves as an indispensable resource for owners, technicians, and mechanics to ensure the longevity, optimal performance, and safe operation of these professional-grade tools.