The best outboard motor gas tank fitting depends on your engine brand, connector style, thread size, and fuel-hose diameter. The Attwood 8889LP6 is best for Johnson/Evinrude/OMC hose connections, while its 8883-6 fitting is a tank-side option for those systems. Other picks cover Tohatsu/Nissan, Mercury/Mariner, and Yamaha applications. Match the part number and measurements to your existing hardware before buying; fittings that look similar may not connect securely.
| Fitting | Best For | Key Detail |
|---|---|---|
| Attwood 8889LP6 | Johnson/Evinrude/OMC hose ends | 3/8-inch hose barb |
| Attwood 8883-6 | Johnson/Evinrude/OMC tank connections | 1/4-inch NPT male thread |
| CULMKARI 5/16-inch connector | Tohatsu/Nissan outboards | Listed for selected 5–90 HP engines |
| Attwood Mercury/Mariner kit | Mercury/Mariner portable fuel systems | Chrome-plated brass construction |
| X AUTOHAUX connector set | Yamaha fuel-line connections | Includes 6 mm male and female connectors |
Attwood 8889LP6 Hose Fitting
This Attwood fitting is best for a Johnson, Evinrude, or OMC fuel-line connection that uses a 3/8-inch inside-diameter hose. Its acetal body has a barbed hose connection, and the product is designed to mate with Attwood part 8883-6. That pairing makes it a useful choice when replacing the hose-side component in a compatible setup.
Choose this fitting if you need the specified hose barb and engine-family match. Limitation: hose clamps are not included, so they must be obtained separately. Confirm that the existing tank fitting and hose dimensions match before ordering.
Attwood 8883-6 Tank Fitting
The Attwood 8883-6 is best for compatible Johnson, Evinrude, and OMC fuel tanks that require a 1/4-inch NPT male-thread tank fitting. It is made from solid machined brass and uses a quick-connect design. The product is also identified as the matching tank-side fitting for Attwood 8889LP6.
Choose this part when your tank outlet and hose connector are specified for this fitting family. Its brass construction is intended for marine use, but the product description does not make it a universal connector. Check the thread type and engine or tank application before replacing an existing fitting.
CULMKARI Tohatsu/Nissan Connector
This 5/16-inch fuel connector is best for owners of listed Tohatsu or Nissan 2- or 4-stroke outboards. The product description names selected engine sizes from 5 to 90 HP and gives replacement part numbers 3B2-70260-1 and 3B2-70250-1. Those identifiers offer a practical way to compare it with the part being replaced.
Choose it if the engine brand, connector dimensions, and replacement number match your application. Limitation: the wide range of listed horsepower sizes does not establish fitment for every engine in that range. Verify the model and part number rather than relying on horsepower alone.
Attwood Mercury/Mariner Fitting Kit
This Attwood kit is best for portable fuel systems identified for Mercury or Mariner engines and tanks. Its chrome-plated brass construction is described as corrosion resistant. The listed fuel types include leaded, unleaded, ethanol-blended, and alcohol-blended fuels, making fuel-type support a useful comparison point for buyers.
Choose this kit when your existing setup calls for a Mercury/Mariner fitting and the kit’s connection style matches. Limitation: the supplied details do not specify thread size or individual kit components. Check those details against your current fitting before purchase.
X AUTOHAUX Yamaha Connector Set
This three-piece set is best for Yamaha outboard owners who need the listed 6 mm fuel-line connectors. Its details identify tank-side female and engine-side male connector part numbers, with applications described for Yamaha 2- and 4-stroke outboards. The listing also describes an integrated seal and materials intended to resist weather and sunlight.
Choose this set if the part numbers, connector appearance, and 6 mm size match your existing components. Limitation: the application list is broad and says to confirm the part number, appearance, and size before buying. Do not use the horsepower list alone to determine fit.
Buying Guide: How To Choose An Outboard Fuel Fitting
Which engine brand and part number do you need?
Start with the engine and tank manufacturer, then compare the fitting’s part number with the number on your old component or equipment documentation. A connector intended for Johnson/Evinrude/OMC may not fit Yamaha, Mercury/Mariner, or Tohatsu/Nissan systems. Brand and part-number checks are more reliable than appearance alone.
Is the fitting for the tank or the fuel hose?
Identify which side needs replacement. A tank fitting attaches at the fuel tank, while a hose fitting connects to the fuel line. Some listings identify a matching pair, such as the Attwood 8883-6 tank fitting and 8889LP6 hose fitting. Replacing only one side works only when it matches the other connector.
What measurements should you check?
Compare thread type and size, hose inside diameter, and connector diameter. For example, a 1/4-inch NPT male thread is not the same specification as a 3/8-inch hose barb or a 6 mm connector. Do not assume that measurements in different parts of the listing describe interchangeable dimensions.
Does construction or fuel type matter?
Review the material and stated fuel compatibility. The listed products include acetal and brass options, and the Mercury/Mariner kit specifically describes support for several fuel types. Use only a fitting whose stated application matches your fuel system. Follow the product instructions and inspect connections for secure installation.
Frequently Asked Questions
Are outboard motor gas tank fittings universal?
No. Fittings can differ by engine brand, connector design, thread, hose size, and tank application. Confirm the exact part number and dimensions.
How do I know whether I need a tank or hose fitting?
Check where the damaged or missing part sits. Tank fittings attach to the fuel tank; hose fittings connect to the fuel line.
What does a 3/8-inch hose barb specify?
It identifies the hose inside diameter the barb is designed to accept. Check the hose measurement and fitting requirements before installation.
Can I choose a fitting by horsepower?
Horsepower can help narrow choices, but it does not confirm fit. Match the engine model, part number, connector appearance, and measurements.
Are hose clamps included with the Attwood 8889LP6?
No. Its listing says to purchase hose clamps separately.