Yamaha - Fuel Feed Plug Assembly Fuel System Component YF1-38113-30-80. Overview. Fuel systems on Yamahas don't leave much room for leaks or weak points, especially around fittings and plugs. I've seen engines run poorly or even refuse to start just because a small plug wasn't sealing right. The Yamaha Fuel Feed Plug Assembly YF1-38113-30-80 helps close off and secure part of the fuel system so pressure stays consistent. It's a simple piece, but it plays a big role in keeping fuel delivery clean and reliable.. Key Features. • Secure Fuel System Seal - Helps maintain proper pressure by sealing fuel passage points.. • Yamaha Engineered Fit - Designed to match factory threading and sealing surfaces.. • Fuel-Resistant Construction - Built to withstand fuel exposure and engine heat.. • Supports Reliable Fuel Delivery - Helps prevent leaks and maintain steady engine performance.. • Direct Replacement Assembly - Installs easily during fuel system service or repair.. Engine & Boat Compatibilit