Primer Bulb Outboard Multi-Layer, 3/8 in I.D. | 4Boats

High-performance multi-layer primer bulb engineered for faster starts, low fuel permeation and broad outboard compatibility across −8°C to 50°C (18°F–122°F).

• Unmatched performance: Delivers up to 60% more priming output than leading brands for quicker starts and fewer strokes.
• Advanced multi-layer technology: Exclusive three-layer construction for reliable pumping power and pressure control.
• Inner layer: Prevents collapse under vacuum, maximizing pumping power.
• Middle layer: Maintains functionality in extreme temperatures, hot or cold.
• Outer layer: Resists ballooning under pressure to ensure safety.
• Low-permeation design: Reduces fuel evaporation, saving fuel and minimizing environmental impact.
• Dual high-efficiency check valves: Enable priming in any position with minimal fuel restriction, protecting fuel-pump longevity.
• Compatibility & packaging: Works with most outboards 1–350 hp and ethanol blends; 3/8 in (9.5 mm) I.D.; cross refs OMC: 174511, 17644/174512; Mercury/Quicksilver: 13330A3, 93516LP7; supplied in clamshell packaging.
• Durable & certified: Exceeds OEM fuel-flow requirements, engineered hose barbs for leak-free fit, EPA & CARB certified; backed by a 2-year warranty. Attwood quality and construction deliver long service life and reliable priming.