This comprehensive service and repair manual provides detailed instructions for maintaining and repairing Stihl BG75, HS75, HS80, and HS85 outdoor power equipment models. It includes two manuals: one focusing on repairs for the listed models and another dedicated to comprehensive service, repair, troubleshooting, and tuning procedures. The manual covers the 4137 powerhead engine, a common component across these models, ensuring you have a complete resource for addressing any maintenance or repair needs.

The Stihl BG75, HS75, HS80, and HS85 are a series of powerful and versatile backpack blowers designed for demanding professional landscaping and forestry applications. These blowers are renowned for their exceptional performance, durability, and user-friendly features. The BG75, powered by a 75cc engine, is ideal for clearing debris from large areas, while the HS75, equipped with a 75cc engine, focuses on precise control and maneuverability. The HS80 and HS85 models, both featuring powerful 80cc and 85cc engines respectively, are designed to tackle the most challenging clearing tasks, including heavy brush and thick foliage. Each model within this series boasts a range of advanced features. The Stihl M-Tronic electronic engine control system ensures consistent performance and optimal fuel efficiency, while the anti-vibration system reduces user fatigue, promoting extended operation. The blowers feature a robust design with a durable housing and high-quality components, guaranteeing long-lasting performance even in harsh conditions. Additionally, the Stihl BG75, HS75, HS80, and HS85 models come equipped with convenient features like a variable speed control, a comfortable harness system, and a range of blower tube options to suit different applications. These powerful and reliable backpack blowers are designed to meet the demanding needs of professionals, providing exceptional performance and efficiency for all clearing tasks.