Mercury – Inlet Needle Valve | Carburetor Fuel Control | Precision Marine Alloy | 879194011

Overview

If you’ve spent enough time around small and mid-horsepower outboards, you already know how much of a difference a well-behaved carburetor can make. A clean, steady idle… a smooth rise onto plane… crisp throttle response when you need to dodge a crab pot at the last second. It all comes down to tiny parts doing their jobs without hesitation. The Mercury Marine 879194011 Inlet Needle Valve is one of those parts—small, easy to overlook, but essential to keeping your 2-stroke running clean, predictable, and ready for the next stretch of open water. When this valve is right, everything feels easier and more confident.

Key Features

• Controls fuel flow into the carburetor float bowl for consistent delivery
• Precision-made inlet needle valve engineered for Mercury and Mariner outboards
• Marine-grade alloy designed for durability and fuel-system stability
• Set to original Mercury specifications for proper float height and operation
• Ideal replacement during carburetor rebuilds or seasonal maintenance
• Designed to handle the vibration and fuel demands of 2-stroke engines
• Manufactured to Mercury Marine’s original equipment standards

Engine & Boat Compatibility

• Fits select 30–150 horsepower Mercury and Mariner 2-stroke outboards
• Works with single-, twin-, and triple-carburetor configurations depending on model
• Found on skiffs, pontoon boats, bay boats, aluminum fishing boats, and older performance hulls
• Suitable for recreational, commercial, and light-duty work applications

Performance & Practical Benefits

When an inlet needle valve starts sticking, leaking, or wearing down, you feel it everywhere—hard starting, fuel seepage, bogging, and that uneven idle that never quite seems to settle. With this OEM valve installed and adjusted to spec, fuel enters the bowl smoothly and shuts off cleanly. You’ll notice steadier throttle transitions and fewer surprises when shifting from idle to acceleration.

The fit is tight and secure, with just the right sensitivity to keep the float level stable even when your boat’s bouncing through chop. That dependable seal helps prevent flooding, keeps plugs cleaner, and maintains the crisp responsiveness that makes 2-stroke engines feel so lively. And because it’s built specifically for Mercury’s carburetor systems, installation is straightforward—no fiddling with mismatched angles or questionable aftermarket tolerances.

This is one of those simple, satisfying fixes that instantly improves how your engine behaves on the water.

Why Buy OEM

Choosing OEM for fuel-system components isn’t about brand loyalty—it’s about trust.

• Mercury Marine parts match the original design exactly
• Reliable float operation means fewer breakdowns and smoother running
• Longer-lasting materials reduce the need for frequent carburetor repairs
• Helps preserve fuel efficiency and throttle response
• Protects your engine from flooding, lean conditions, or wash-down damage

When it comes to precise metering parts, OEM simply performs better and lasts longer.

FAQ

Q1: Which engines does the 879194011 Inlet Needle Valve fit?

It fits select Mercury and Mariner 2-stroke outboards from 30 to 150 horsepower.

Q2: How is this part different from aftermarket valves?

OEM valves are built to Mercury’s exact float-level and seating tolerances, ensuring proper fuel control without guesswork.

Q3: How can I confirm it’s the right valve for my carburetor?

Match your engine’s serial number and confirm the carburetor model in your service manual.

Q4: Can this valve be used in both saltwater and freshwater engines?

Yes. Its materials and design are suitable for both environments when properly maintained.

Q5: Is installation simple for most boat owners?

If you’re comfortable opening a carburetor, the replacement is straightforward. Just reinstall and set to factory specifications.