This workshop service repair manual covers the Briggs & Stratton 273521. This engine features a Twin Cylinder OHV configuration, known for its robust engineering and reliability. While specific production years are not detailed, this manual is designed to assist with all models and engine variants. The Twin Cylinder OHV design is a testament to efficient power delivery and durability, making it suitable for a wide range of applications. The purpose of this English-language manual is to provide comprehensive repair and service information for the Briggs & Stratton 273521. It includes all repair procedures from A-Z, covering maintenance, tune-up procedures such as spark plug, carburetor, and valve adjustments, and detailed troubleshooting guides. Information on oil specifications, filter types, and service intervals is also provided. This manual is an essential resource for owners, mechanics, and technicians to ensure optimal performance and longevity of the engine.