Replacing OEM numbers: 5910 890 2307,5910-890-2307,59108902307, which is a direct replacement for the old or broken one. Compatibility: This product is suitable for most domestic 2-stroke engines, and is also Compatible with Stihl 4mm Hexagon Screws, and Compatible with various brands, such as Compatible with Sears, Compatible with Craftsman, Compatible with Poulan. Compatible with Husq-varna, Compatible with Weedeater, Compatible with Echo, Compatible with To-Ro, Compatible with Ryobi, Compatible with Homelite. Product Features: Adjusting the carburetor can increase or decrease the idle speed of the engine, so that the right amount of fuel and air are mixed in the carburetor, so a correct adjustment of the carburetor can improve the performance of the engine. Ergonomically designed handle provides comfort for work, heavy-duty adjustment head, precise and easy to adjust the carburetor., Manufacturer: The Lord of the Tools