The Boating Essentials Gen III Universal Fuel Primer Bulb ensures efficient fuel priming for your outboard motor, supporting quick starts and steady performance during long days on the water. Compatible with 3/8' or 5/16' fuel hoses, it works with a range of outboard engines including Mercury, Yamaha, and Evinrude. The integrated double check valve and Speed Prime technology deliver fast, reliable fuel flow without backflow issues. Built for marine conditions, it includes stainless steel clamps for secure installation and holds EPA approval for environmental compliance. Fits 3/8' or 5/16' fuel hoses for broad engine use Double check valve prevents fuel backflow to maintain efficient flow Compatible with a wide range of outboard engines EPA approved for environmentally responsible performance Includes durable stainless steel clamps Quantity per pack: 1