The Mercury Jet -.058 (1395-7831) is a precision-engineered carburetor jet designed to regulate fuel flow, ensuring proper combustion and performance. Whether you're fine-tuning your engine for optimal efficiency or replacing a worn-out jet, this OEM Mercury part provides a reliable fit and function.. Key Features & Benefits:. ✔ Optimized for Mercury Outboards - Designed to meet factory specifications for a perfect fit.✔ Durable Brass Construction - Corrosion-resistant material withstands fuel exposure and harsh marine conditions.✔ Enhances Fuel Efficiency - Maintain the correct air-fuel ratio for better throttle response and reduced fuel waste.. Keep your Mercury outboard running at peak efficiency-replace worn jets with a genuine Mercury Jet -.058 today.