5/16" Fuel Line Assembly – Fits Yamaha Outboard Motors 4-350 HP (Replaces 6Y1-24306-55)
5/16" Fuel Line Assembly – Fits Yamaha Outboard Motors 4-350 HP (Replaces 6Y1-24306-55) is backordered and will ship as soon as it is back in stock.
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5/16" Fuel Line Assembly – Fits Yamaha Outboard Motors 4-350 H...
5/16" Fuel Line Assembly – Fits Yamaha Outboard Motors 4-350 HP (Replaces 6Y1-24306-55) is backordered and will ship as soon as it is back in stock.
Product Details
This aftermarket 5/16" Fuel Line Assembly – Fits Yamaha Outboard Motors 4-350 HP (Replaces 6Y1-24306-55) is designed for a wide range of Yamaha outboard motors from 4 to 350 HP. The 6.5-foot, 5/16" (8mm) inner diameter hose includes a primer bulb and standard connectors for linking portable fuel tanks to the engine.
This assembly serves as an interchange for Yamaha part numbers 6Y1-24306-55, 61J-24306-04-00, 6Y2-24306-56, 6YK-24306-64, 6YL-24306-68, and 6Y2-24306-A2.
- Easy external installation connects a portable fuel tank to the engine.
- Compatible with modern ethanol-blended fuels (E10).
- Built with a UV and ozone-resistant rubber housing for durability in marine environments.
Part Number Matrix
Use this matrix to confirm equivalent references across OEM and aftermarket.
| Brand | Part Number |
|---|---|
| Yamaha | 6Y1-24306-55 |
| Yamaha | 61J-24306-04-00 |
| Yamaha | 6Y2-24306-56 |
| Yamaha | 6YK-24306-64 |
| Yamaha | 6YL-24306-68 |
| Yamaha | 6Y2-24306-A2 |
Engine & Model Compatibility
Confirm your engine model/year in the table below.
This 5/16" (8mm) fuel line assembly is engineered to fit a majority of Yamaha outboard motors, covering models from 4 HP up to 350 HP. While fitment is broad, always verify your specific model requirements.
| Brand | Model | Rated HP | Stroke | OEM Part No. | Notes |
|---|---|---|---|---|---|
| Yamaha | Various Outboard Models | 4 | 2-Stroke & 4-Stroke | 6Y1-24306-55 | |
| Yamaha | Various Outboard Models | 5 | 2-Stroke & 4-Stroke | 6Y1-24306-55 | |
| Yamaha | Various Outboard Models | 6 | 4-Stroke | 6Y1-24306-55 | |
| Yamaha | Various Outboard Models | 8 | 2-Stroke & 4-Stroke | 6Y1-24306-55 | |
| Yamaha | Various Outboard Models | 9.9 | 2-Stroke & 4-Stroke | 6Y1-24306-55 | |
| Yamaha | Various Outboard Models | 15 | 2-Stroke & 4-Stroke | 6Y1-24306-55 | |
| Yamaha | Various Outboard Models | 20-30 | 2-Stroke & 4-Stroke | 6Y1-24306-55 | |
| Yamaha | Various Outboard Models | 40-60 | 2-Stroke & 4-Stroke | 6Y1-24306-55 | |
| Yamaha | Various Outboard Models | 70-90 | 2-Stroke & 4-Stroke | 6Y1-24306-55 | |
| Yamaha | Various Outboard Models | 100-150 | 2-Stroke & 4-Stroke | 6Y1-24306-55 | |
| Yamaha | Various Outboard Models | 175-200 | 2-Stroke & 4-Stroke | 6Y1-24306-55 | |
| Yamaha | Various Outboard Models | 225-250 | 2-Stroke & 4-Stroke | 6Y1-24306-55 | |
| Yamaha | Various Outboard Models | 275-350 | 4-Stroke | 6Y1-24306-55 |
Technical Specs
- Product Type
- Outboard Fuel Line Assembly with Primer Bulb
- Installation
- External, tank-to-engine connection
- Fuel Compatibility
- Compatible with ethanol-blended fuels
- Connection
- Portable tank to outboard engine
- Housing Material
- Flexible rubber with UV/ozone resistance
- Housing Color
- Black
- Dimensions
- 6.5 ft (1.98 m) length, 5/16" (8mm) inner diameter
- Weight
- 0.49 kg (1.08 lbs)
- Fitting Type
- Marine outboard standard connectors
- Technical Attributes
- Alcohol-enhanced fuel resistant, UV/ozone resistant
What’s in the Box
- 1x Fuel Line Assembly with Primer Bulb
- 2x End Fuel Connector Fittings
Installation Notes
- Ensure the engine is completely off and has cooled down. Work in a well-ventilated area away from sparks or open flames.
- Disconnect the old fuel line from both the fuel tank and the outboard engine by releasing the connectors.
- Attach the new fuel line assembly, ensuring the arrow on the primer bulb points in the direction of fuel flow (from the tank to the engine).
- Securely click the connectors onto the fuel tank and engine fittings. Give a gentle tug to confirm they are locked in place.
- Squeeze the primer bulb repeatedly until it becomes firm. This indicates the fuel line is filled.
- Visually inspect the entire line and all connection points for any signs of fuel leakage before attempting to start the engine.
Troubleshooting & FAQ
How do I know if this 5/16" fuel line is correct for my Yamaha?
This 5/16" (8mm) line is standard on a vast range of Yamaha outboards (4-350 HP). However, some models may use a different size (e.g., 3/8"). Always check your existing line's diameter or your service manual to confirm compatibility. When in doubt, consult a marine mechanic.
What are the common signs that a fuel line needs to be replaced?
Look for cracks, brittleness, or visible perishing on the rubber hose. Other signs include a primer bulb that won't stay firm, leaks at the connectors, or fuel starvation issues with your engine.
Is this assembly resistant to modern ethanol fuels?
Yes, this fuel line is manufactured with materials compatible with modern ethanol-blended gasoline (up to E10), preventing premature degradation.
How often should I replace my outboard fuel line?
As a general maintenance item, it's good practice to inspect your fuel line annually and replace it every 3-5 years, or immediately if you notice any signs of wear, damage, or leaking.
Is this an OEM Yamaha part?
This listing is an aftermarket replacement (not OEM). Built to OEM-level specifications with comparable materials. Manufactured in an ISO 9002 facility, batch-inspected for consistency.
What are the shipping speed and cost?
We ship worldwide quickly—typical transit 5–15 days. Standard shipping is free; expedited options appear at checkout where available.
What is the warranty and return policy?
Covered by a 1-year warranty against manufacturing defects under normal use. If issues arise, contact support with your order details. Returns are accepted within our standard window (unused & in original condition). See our policy page or reach out for instructions.
Safety & Important Info
- Verify images/specifications vs your original part. If anything differs—even if your model appears compatible—do not purchase.
- This is an aftermarket replacement, not an OEM component.
- Professional installation is recommended for safety and performance.
About Sea Sierra
- Pro-Grade Standards — We supply marine parts engineered to OEM-level tolerances and tested for real-world conditions.
- Fast Global Fulfillment — Free standard delivery to most regions in 5–15 days.
- Manufacturer-Direct Value — Fair pricing without compromising on materials or QC.
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