Getting the right fuel-to-air ratio is key to smooth, efficient engine performance, and the Yamaha Main Jet #108 (65W-14943-79-00) is built to deliver precise fuel metering. Designed to regulate fuel flow within the carburetor, this genuine Yamaha jet ensures optimal combustion, crisp throttle response, and consistent power output in a range of marine conditions. Whether you're idling through no-wake zones or pushing full throttle, the right jet keeps your outboard running clean and strong.. Built for Performance & Reliability. Precise Fuel Regulation - Maintains the correct mixture to enhance power delivery, reduce fuel waste, and improve overall efficiency.. Durable Marine-Grade Construction - Crafted to withstand heat, corrosion, and constant fuel exposure, ensuring long-term reliability.. OEM Fit & Function - Designed to Yamaha's exact specifications for a seamless fit and hassle-free installation.. Keep Your Engine Dialed In. Compatible with Yamaha F25 and T25 outboards, this main