Sierra 118-36850 Needle & Seat Assembly for MerCruiser Carburetors

The Sierra 118-36850 Needle & Seat Assembly is a high-quality carburetor replacement component designed for MerCruiser 2.5L and 3.0L marine engines. This essential fuel system part controls fuel flow into the carburetor's fuel bowl, regulating the precise fuel level needed for optimal engine performance.

Key Features:

• Engineered to meet or exceed OEM specifications for reliable performance
• Controls fuel flow and regulates fuel bowl level for proper carburetor function
• Direct replacement for MerCruiser applications
• Precision-manufactured components ensure proper sealing and fuel delivery
• Essential component for carburetor rebuilds and repairs

The needle and seat work together as a fuel metering system, with the seat acting as a precision valve that the needle closes against to stop fuel flow when the bowl reaches the proper level. When this component wears or fails, it can cause flooding, rough idle, or poor fuel economy. Sierra has been manufacturing marine engine parts for over 50 years, earning the trust of engine manufacturers and boaters worldwide with parts engineered for durability in the harsh marine environment.