For EC 300 250 EX300 2021-2023 Fuel Idle Speed Adjuster Screw For EXC XCW 300 250 2018-2023 TE 250 300i Fuel idle speed adjuster screw compatible with EC 300, EC 250, EX300 models from 2021 to 2023 and EXC, XCW 300, EXC 250 models from 2018 to 2023, as well as TE 250 and TE 300i models within the same period.This adjuster screw is designed to regulate the engine's idle speed.It serves as a replacement part for the component.Installation requires standard mechanical tools and knowledge.The screw fits into the carburetor or fuel system housing where idle adjustment is needed.It allows fine-tuning of engine performance during idle conditions.This product is not affiliated with the manufacturer.Brand mentions are used for compatibility indication.