Attwood Yamaha Tank Fitting - 1/4" NPT Thread

The Attwood Yamaha Tank Fitting with 1/4" NPT thread is a precision fuel system connector engineered for marine and powersports applications where reliability under sustained fuel exposure is non-negotiable. As a mechanic, you understand that fuel fittings are the backbone of any engine's delivery system—cheap or corroded fittings lead to vapor leaks, contamination, and catastrophic engine damage. This fitting exists specifically to bridge modern fuel tanks and fuel lines on Yamaha-branded engines and select Mercury/Mariner platforms without compromise, ensuring a sealed, pressure-tight connection that survives years of thermal cycling and chemical exposure.

Constructed from solid machined brass, the Attwood tank fitting resists corrosion from lead, unleaded, and alcohol-blended fuels—a critical design feature when working with ethanol-infused pump gasoline or stored fuel that may degrade elastomer seals over time. The 1/4" NPT (national pipe thread) connection is industry standard for small-displacement outboards and fuel delivery systems, providing a tapered thread interface that creates a mechanical seal without requiring thread tape or additional sealant on most applications. Brass is non-magnetic and chemically stable against fuel components; it won't leach metals into the fuel system or corrode in the presence of water intrusion, making it the preferred choice for any permanent fuel-system installation where longevity outweighs cost.

Technicians replacing fuel pickup tubes, installing custom fuel tanks, or restoring older Yamaha outboards will find this fitting indispensable for maintaining OEM compatibility and reliability. The 1/4" NPT thread accepts standard marine fuel line barbs, hose clamps, and bulk-head fittings without adapter complexity. Installation requires no special tools beyond a wrench or socket—hand-tighten until snug, then rotate an additional quarter turn to seat the tapered thread. This fitting is best paired with quality fuel hose (SAE J30R7 or J30R9 rated for ethanol exposure) and stainless steel hose clamps to complete a robust fuel system that performs whether you're running a casual recreational engine or a commercial workboat.