This manual covers Briggs & Stratton OHV Single Cylinder Air-Cooled engines, specifically the horizontal shaft series 110000, 120000, 150000, 200000, 210000 and vertical shaft series 97700, 99700, 110000, 120000, 210000, 280000, 310000, 330000. These engines are known for their robust engineering and reliability, making them suitable for a wide range of applications. This document provides comprehensive information to ensure optimal performance and longevity of your engine. This electronic workshop manual is presented in English and is designed for both professional mechanics and non-experienced users. It offers very detailed instructions, high-definition diagrams, and is well-structured with bookmarks for easy navigation. The manual covers essential service and repair procedures for various engine systems, including ignition, air cleaner, carburetion, governor controls, starters, lubrication, and more. It also includes troubleshooting guides, maintenance schedules, and torque specifications, empowering users to effectively maintain and repair their engines.