Yamaha Carburetor Assembly 1 7BL-E4101-00-00. Overview. The Yamaha Carburetor Assembly 1 7BL-E4101-00-00 is a premium replacement component designed to ensure optimal performance and reliability for your marine engine. Engineered to meet Yamaha's exact specifications, this carburetor assembly provides a precise fit and seamless integration with your engine system.. It effectively addresses common issues such as poor idling, fuel leaks, and reduced engine power. By delivering a balanced fuel-air