SIERRA 18-7057 NEELE AND SEAT

SIERRA 18-7057 NEEDLE AND SEAT The Sierra needle and seat assembly (18-7057) is a precision carburetor component engineered to regulate fuel flow with exacting accuracy in marine engines. This matched pair controls fuel delivery to maintain proper air-fuel ratios essential for reliable starting and smooth operation across throttle ranges. Constructed from durable materials resistant to fuel degradation and sediment accumulation, this assembly withstands the demands of saltwater and freshwater environments. An essential wear item during carburetor service or rebuild, this genuine Sierra component restores fuel metering precision and engine performance. Replace as part of routine maintenance to ensure consistent combustion and fuel efficiency.