The Vintage Briggs & Stratton 2 and 1/2 HP Vertical Shaft Mower Engine is a gas-powered engine designed for lawn mowers. Made of durable steel material, this engine features a single cylinder and air cooling system. With a horsepower of 2.5, this engine is compatible with various lawn mower models and is a reliable choice for outdoor power needs. Being a unit sold individually, this engine is a great option for those looking to repair or replace their current mower engine.