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. Commonly used across a range of Yamaha outboards where stable idle and smooth throttle transition are essential.

FAQ

Q: What are signs this pilot jet is clogged?
A: Rough idle, stalling, or hesitation when you first apply throttle are common signs.

Q: Can I clean the jet instead of replacing it?
A: You can try, but if performance doesn’t improve, replacement is usually the better fix.

Q: Does jet size really matter?
A: Yes, even small differences affect the fuel mixture and how the engine runs at low speed.

Q: How does fuel quality impact this part?
A: Dirty or old fuel can clog the jet quickly, especially without proper filtration.

Q: Any installation tips?
A: Install it carefully, make sure it’s seated properly, and avoid over-tightening.