Yamaha - Pilot Jet #35 Carburetor Fuel Metering Component 7CU-E4142-35-A0. Overview. Pilot jets are one of those small parts that can make or break how an engine idles. When this one's off-even slightly-you'll feel it right away with rough idle or hesitation coming off throttle. I've swapped these out plenty of times when cleaning didn't fix the issue. Once it's right, the engine settles in and runs smooth where it matters most at low speed.. Key Features. • Idle Fuel Control - Regulates fuel flow at idle and low throttle for smooth engine operation.• Precision Jet Sizing - Calibrated at 35 for accurate fuel-air mixture in carbureted systems.• OEM Threaded Fit - Installs cleanly into the carburetor with proper seating and alignment.• Improves Low-Speed Response - Helps reduce stalling, hesitation, and uneven idle behavior.. Engine & Boat Compatibility. Designed for Yamaha outboard engines equipped with carbureted fuel systems that utilize a pilot jet for low-speed fuel control. Commonl