This manual covers the Briggs & Stratton 126cc 1 Cylinder OHV Engine, specifically models 085400 and 086400, for production years 2008 through 2016. Designed for reliable performance and efficient operation, these engines are built with quality engineering to meet the demands of various applications. Their overhead valve (OHV) design contributes to improved fuel efficiency and power output, making them a dependable choice for users requiring consistent and robust engine performance. This comprehensive workshop service repair manual provides detailed instructions and technical information essential for the maintenance, repair, and servicing of your Briggs & Stratton engine. It includes procedures for routine maintenance, troubleshooting common issues, and in-depth repair guidance. By following the information presented, owners and technicians can ensure their engine remains in optimal working condition, extending its lifespan and maximizing its operational efficiency.