Answering the common question, these outboard gas line connectors are designed to join portable fuel tanks to Yamaha, Mercury, and other popular outboard engines. This guide highlights five solid choices for different boaters—from weekend anglers to small-craft owners—so you can select the right connector for your engine and fuel hose size. The products below cover 1/4″ to 3/8″ hose IDs, brass and acetal materials, and quick-connect designs. A concise buying table is provided to compare compatibility, material, and connection type at a glance.
Quick buying table
| Product | Material | Best For | Notes |
|---|---|---|---|
| Attwood 8889LP6 | Acetal | Oupboard engines using 3/8″ hose | Barb fittings, easy install |
| Vkinman Quick Connect (2 pcs) | Brass & Aluminum | Yamaha outboards and portable tanks | Quick, universal compatibility |
| Attwood Brass Quick-Connect 8883-6 | Brass | Johnson/Evinrude/OMC engines | NPT 1/4″ male thread |
| X AUTOHAUX 3pcs | Brass/Aluminum | Yamaha 6mm hoses | Multiple part numbers for fit |
| Quicksilver 13563Q3 | Brass fittings | Mercury/Mariner/Force tanks | 5/16″ ID hose compatibility |
Attwood 8889LP6 Acetal 3/8-Inch Barb Fuel Hose Fitting
This 3/8-inch barb fuel hose female tank fitting is designed for Attwood systems and is compatible with Johnson/Evinrude/OMC engines. It uses acetal material for durability and corrosion resistance in marine environments. Best for boaters with Attwood tanks and 3/8″ hoses who need a simple, reliable connection. A potential limitation is the requirement to purchase hose clamps separately to secure the hose.
Vkinman 2 Pcs 1/4 Inches 6mm Barb Quick Connect
These 1/4-inch (6 mm) barbed female and male fittings are suitable for Yamaha outboards and many portable tanks. Brass and aluminum construction helps resist marine weathering while maintaining a secure seal. Best for quick, tool-free connections and straightforward hose management. They are a versatile option for several small-craft setups, but verify hose ID compatibility before purchase.
Attwood Brass Quick-Connect Tank Fitting 1/4 Inch (8883-6)
This solid machined brass quick-connect features a 1/4-inch NPT male thread for fast, secure installation with compatible tanks. It’s designed for Johnson, Evinrude, and OMC engines, delivering reliable performance in salt and freshwater. Choose this if you need robust brass construction and a straightforward threaded connection. A limitation is the fixed thread size, which must match your tank port.
X AUTOHAUX 3pcs 6mm Fuel Line Connectors
These fittings cover Yamaha outboard engines with 6 mm fuel line requirements. The set includes male and female connectors across multiple part numbers, making it practical for repairing or expanding fuel line networks. Best for Yamaha-specific applications and for boaters who want a multi-pack for future maintenance. A caveat is to confirm the exact part numbers and sizes before purchasing to avoid mismatches.
Quicksilver 13563Q3 Quick Disconnect Fitting
This quick disconnect fitting is designed to connect portable tanks to Mercury, Mariner, and Force outboards using a 5/16″ (8 mm) I.D. fuel line. It includes a double-seal connector and a hose clamp for a secure fit. Best for Mercury-driven systems requiring a robust, ready-to-use disconnect. Avoid this if your hose is not 5/16″ I.D. or if your engine requires a non-standard connection size.
Attwood 88FHE516-6 Johnson/Evinrude/OMC Fuel Hose Fitting
Specifically a 3/8-inch hose female fit, molded in acetal, and designed to mate with Attwood tank fittings like model 8883-6. Best for Attwood systems that use a 3/8″ hose. A limitation is being compatible primarily with Attwood tanks and fittings, which may restrict universal use in non-Attwood setups.
Buying Guide
What hose size do you need?
Common hose IDs are 1/4″ (6 mm) and 3/8″. Match the connector to your hose size to ensure a proper seal and reliable fuel transfer. When in doubt, measure the inner diameter of your hose and verify the barb size on the connector.
Metal vs. plastic materials
Brass fittings offer high durability and corrosion resistance for saltwater use. Acetal or plastic connectors are lightweight and often cost-effective but may wear faster under heavy use. Consider your water type (salt vs. freshwater) and maintenance habits when choosing material.
Compatibility with engines and tanks
Some connectors are designed for specific brands (Johnson/Evinrude/OMC, Yamaha, Mercury). Always verify engine and tank compatibility before purchasing. If your system combines different brands, seek universal or multi-brand fittings.
Installation and maintenance considerations
Assess whether clamps are included or need to be purchased separately. Quick-connects are advantageous for frequent disconnections, while threaded fittings require matching port sizes. Regularly inspect seals and replace worn gaskets to prevent leaks.
Safety and regulatory notes
Always ensure the fuel system is depressurized before disconnecting lines. Use appropriate hoses rated for fuel and store connectors away from heat sources. Follow local regulations for marine fuel line components and ensure proper disposal of old parts.
Summary of buying considerations
- Size: confirm 1/4″ vs 3/8″ hose ID and barb size
- Material: brass for durability; acetal for lighter weight
- Brand compatibility: match to engine/tank model when possible
- Connection type: quick-connect vs threaded
- Included hardware: clamps and seals availability
Frequently Asked Questions
- What size hose do most outboard connectors use? Answer: Common sizes are 1/4″ (6 mm) and 3/8″ (9 mm) ID hoses; verify your hose ID and barb size.
- Are brass connectors better than plastic? Answer: Brass offers greater durability and corrosion resistance; plastic/acetal is lighter and often lower cost.
- Do I need hose clamps with quick-connect fittings? Answer: Many designs require separate clamps; check your product’s included components.
- Can these connectors be used with multiple brands? Answer: Some are universal, while others are brand-specific; verify compatibility with your engine and tank.
- Is a quick-disconnect safer for frequent maintenance? Answer: Yes, quick-disconnects simplify disconnections but ensure a secure seal to avoid leaks.