This manual covers the Briggs & Stratton 273521, an engine featuring a Three Cylinder OHV configuration. Engineered for reliability, this engine is designed for demanding applications where consistent performance is crucial. Its inline three-cylinder layout and air-cooled system contribute to its robust design. While specific production years are not detailed, the focus on its core mechanical components highlights its intended purpose as a dependable power source. The scope of this Workshop Service Repair Manual is comprehensive, providing essential information for the maintenance and repair of the Briggs & Stratton 273521 engine. It details complete service and repair procedures, covering all aspects necessary for proper upkeep. This manual is an indispensable resource for owners, mechanics, and technicians, offering the technical specifications and guidance required to ensure the engine operates at peak performance and longevity.