5/16" Outboard Fuel Line Assembly – Fits Yamaha 4-350 HP (Replaces 6Y1-24306-55)
5/16" Outboard Fuel Line Assembly – Fits Yamaha 4-350 HP (Replaces 6Y1-24306-55) is backordered and will ship as soon as it is back in stock.
Worry-free returns
Worry-free returns
Shop with confidence. If you’re not completely satisfied, eligible items may be returned within the return window, provided they are unused and in original packaging.
If the return is due to our error or a defective item, we’ll make it right.
Please contact us before returning any item.
Delivery and Shipping
Delivery and Shipping
Orders are typically processed within 1–2 business days.
U.S. orders usually arrive within 6–15 days, depending on stock location and destination.
International delivery times may vary due to customs processing.
Tracking information will be provided once your order ships.
5/16" Outboard Fuel Line Assembly – Fits Yamaha 4-350 HP (Repl...
5/16" Outboard Fuel Line Assembly – Fits Yamaha 4-350 HP (Replaces 6Y1-24306-55) is backordered and will ship as soon as it is back in stock.
Product Details
This 5/16" Outboard Fuel Line Assembly is designed for a wide range of Yamaha outboard motors from 4 HP to 350 HP, covering both 2-stroke and 4-stroke engines. The 6.5-foot line features a premium primer bulb and connects portable fuel tanks to outboard engines.
It serves as a direct 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.
- Installation: External, tank-to-engine connection
- Fuel Compatibility: Formulated for modern ethanol-blended fuels
- Ready to Install: Includes two stainless steel hose clamps for a secure fit
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 assembly is compatible with a broad range of Yamaha outboard models from 4 HP to 350 HP. Verify your engine's required fuel line diameter before ordering.
| Brand | Model | Rated HP | Stroke | OEM Part No. |
|---|---|---|---|---|
| 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 Type
- 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" (8 mm) inner diameter
- Weight
- 0.44 kg (0.97 lbs)
- Fitting Type
- Marine outboard standard connectors
- Other Technical Attributes
- Alcohol-enhanced fuel resistant, UV/ozone resistant
What’s in the Box
- 1 x Fuel Line Assembly with Primer Bulb (Replaces 6Y1-24306-55)
- 2 x Stainless Steel Hose Clamps
Installation Notes
- Ensure the engine is off and cool before starting work. Disconnect the kill switch for safety.
- Carefully disconnect the old fuel line from both the portable fuel tank and the outboard engine connectors.
- Attach the new fuel line assembly. Ensure the arrow on the primer bulb points in the direction of fuel flow (from the tank towards the engine).
- Securely fasten the connectors at both ends. Use the provided stainless steel hose clamps for a tight, leak-free seal.
- Squeeze the primer bulb repeatedly until it feels firm, which indicates the fuel line is full.
- Visually inspect the entire line and all connection points for any signs of fuel leaks before attempting to start the engine.
Troubleshooting & FAQ
How do I confirm this fuel line fits my specific Yamaha model and year?
This assembly is designed for a broad range of Yamaha engines from 4 HP to 350 HP requiring a 5/16" fuel line. While it replaces OEM part 6Y1-24306-55, always compare the connectors and line diameter to your existing part to ensure a perfect match, as specific configurations can vary.
What are signs that my current fuel line needs replacement?
Common signs of a failing fuel line assembly include visible cracks, stiffness, or brittleness in the rubber hose; fuel leaks at the connectors or bulb; and a primer bulb that will not become firm or collapses and fails to re-inflate.
Is this fuel line an original Yamaha part?
No, this is a high-quality aftermarket part designed to meet or exceed OEM specifications. It offers comparable performance and material quality at a better value.
How often should outboard fuel lines be replaced?
As a general maintenance practice, it is recommended to inspect your fuel line at the beginning of each season and replace it every 2-3 years, or immediately if you notice any signs of wear, damage, or fuel leaks.
The arrow on the primer bulb points which way?
The arrow must always point in the direction of fuel flow, which is from the fuel tank to the engine. Installing it backward will prevent fuel from reaching the motor.
Is this compatible with ethanol-blended fuels (like E10)?
Yes, this fuel line is constructed from alcohol-resistant materials specifically designed to withstand the corrosive effects of ethanol-blended gasoline.
OEM vs. Aftermarket?
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.
Shipping speed & cost?
We ship worldwide quickly—typical transit 5–15 days. Standard shipping is free; expedited options appear at checkout where available.
Warranty & returns?
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.
Payment & Security
Payment methods
Your payment information is processed securely. We do not store credit card details nor have access to your credit card information.
