Attwood Primer Bulb 5/16" I.D. Hose

Attwood's multi-layer primer bulbs provide the absolute best combination of performance, reliability, safety and compliance to ensure your experience on the water is easier and safer to enjoy. Their exclusive three-layer design resists collapsing and hardening and ensures high output in temperatures ranging from 18 degrees F to 122 degrees F. Includes high-effieciency check valves with Vitron O-rings for improved sealing. Assembled with the same components as Mercury and Quicksilver.

Product Features

• Exclusive three-layer construction provides the best spring-back during priming and excellent resistance to collapse during high-flow engine operation
• Premium materials give the absolute best combination of performance and reliability: 
  • No cracking/hardening over time
  • Low permeation for EPA/CARB compliance
  • Excellent priming in extreme cold and hot environments
  • Zero chance of material delamination as seen by some competitor's products
• New high-performance check valve O-rings provide 30% improved priming while keeping optimized flow during engine use (20 to 35% better than spring-loaded designs)
• EPA and CARB certified