Yamaha - Carburetor Joint 2 Intake Connection Component 7CT-E3596-00-00. Overview. Carb joints are one of those parts you don't think about until there's an air leak or the engine won't idle right. I've seen motors run rough or surge just from a worn or cracked joint. It's a small piece, but it plays a big role in keeping the fuel-air mix stable. When it's sealed up properly, the engine runs smoother and more consistent.. Key Features. • Secure Carburetor Connection - Provides a tight seal between the carburetor and intake system.• Air Leak Prevention - Helps maintain proper vacuum for stable engine performance.• OEM Fit and Alignment - Designed to match factory mounting points for proper installation.• Durable Material Construction - Built to handle heat, vibration, and marine conditions.. Engine & Boat Compatibility. Designed for Yamaha outboard engines equipped with carbureted fuel systems that use a joint between the carburetor and intake manifold. Commonly used across a range of Y