Scepter Marine Fuel Tank Primer Bulb, 5/16" Hose Barbs, 10542, Boat Accessories 4.5"H x 7.13"L x 1.88"W

The Scepter 10542 marine fuel primer bulb is designed for reliable fuel priming in outboard boat engines using 5/16" fuel lines. Ideal for small boats and portable fuel systems, this primer bulb helps restore fuel flow and ensures quick, consistent engine starts. Built with a high-flow design and dual internal check valves, this fuel primer bulb delivers efficient priming while reducing fuel backflow. Its gasoline- and solvent-resistant construction maintains performance even in colder temperatures and demanding marine conditions. Compatible with ethanol-blended fuels and modern marine fuel systems, this primer bulb is built for durability and long-term reliability in outboard motor applications. Perfect for replacing worn primer bulbs, performing seasonal boat maintenance, or upgrading fuel lines on small fishing boats, dinghies, and other compact vessels.

• Marine Fuel Primer Bulb 5/16" – Designed for standard 5/16" fuel lines used in small outboard engines 
• High-Flow Fuel Priming – Dual internal check valves enable fast and efficient fuel delivery 
• EPA & CARB Compliant – Meets emissions standards for marine fuel systems 
• Ethanol & Gasoline Compatible – Durable construction handles modern blended fuels 
• Prevents Fuel Backflow – Maintains consistent fuel pressure for reliable engine starts 
• Perfect for dinghies, portable tanks, and fuel line replacement