Yamaha Connector (Ball Joint) – Fits Yamaha Outboards (Replaces 663-85518-00)
Yamaha Connector (Ball Joint) – Fits Yamaha Outboards (Replaces 663-85518-00) is backordered and will ship as soon as it is back in stock.
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Worry-free returns
Worry-free returns
You may return most new, unopened items within 7 days of delivery for a full refund. We'll also pay the return shipping costs if the return is a result of our error (you received an incorrect or defective item, etc.).
You should expect to receive your refund within four weeks of giving your package to the return shipper, however, in many cases you will receive a refund more quickly. This time period includes the transit time for us to receive your return from the shipper (5 to 10 business days), the time it takes us to process your return once we receive it (3 to 5 business days), and the time it takes your bank to process our refund request (5 to 10 business days).
If you need to return an item, simply login to your account, view the order using the "Complete Orders" link under the My Account menu and click the Return Item(s) button. We'll notify you via e-mail of your refund once we've received and processed the returned item.
Delivery and Shipping
Delivery and Shipping
Free standard shipping on all orders under 1 KG
Product Details
This Yamaha Connector (Ball Joint) is a fuel connector assembly used in various Yamaha outboard models, including many F-series 4-stroke engines and certain 2-stroke models. It is designed to secure fuel lines, providing a reliable, leak-free connection.
This part is a direct replacement for Yamaha OEM part number 663-85518-00 and serves as an interchange for Parsun F4-05000200.
- Installs as a direct replacement for the original part.
- Features a UV-resistant plastic housing with a durable aluminum clip.
- Engineered to ensure a tight seal for a leak-free fuel connection.
Part Number Matrix
Use this matrix to confirm equivalent references across OEM and aftermarket.
| Brand | Part Number |
|---|---|
| Yamaha | 663-85518-00 |
| Parsun | F4-05000200 |
Engine & Model Compatibility
Confirm your engine model/year in the table below.
This connector is widely used on various Yamaha F-series 4-stroke engines.
Compatible with a broad range of Parsun 4-stroke outboard models as listed below.
| Brand | Model | Rated HP | Stroke | OEM Part No. | Notes |
|---|---|---|---|---|---|
| Yamaha | Various F-series | Various | 4-Stroke | 663-85518-00 | Ball Joint |
| Parsun | F4/F5 | 4/5 | 4-Stroke | F4-05000200 | Fuel connector assembly |
| Parsun | F5A/F6A | 5/6 | 4-Stroke | F4-05000200 | Fuel connector assembly |
| Parsun | F8/F9.8 | 8/9.8 | 4-Stroke | F4-05000200 | Fuel connector assembly |
| Parsun | F9.9/F15 | 9.9/15 | 4-Stroke | F4-05000200 | Fuel connector assembly |
| Parsun | F15A/F20A | 15/20 | 4-Stroke | F4-05000200 | Fuel connector assembly |
| Parsun | F15A/F20A EFI | 15/20 | 4-Stroke | F4-05000200 | Fuel connector assembly |
| Parsun | F20/F25 | 20/25 | 4-Stroke | F4-05000200 | Fuel connector assembly |
| Parsun | F30/F40 | 30/40 | 4-Stroke | F4-05000200 | Fuel connector assembly |
| Parsun | F50/F60 | 50/60 | 4-Stroke | F4-05000200 | Fuel connector assembly |
Technical Specs
- Product Type
- Fuel Connector (Ball Joint)
- Installation
- Direct replacement
- Dimensions
- 1.0" L x 1.1" W x 1.7" H
- Fuel Type
- Gasoline
- Connection
- Fuel line coupling
- Housing Material
- UV-resistant plastic with aluminum clip
- Fitting Type
- Spring-loaded aluminum clip secures female connector to male fitting
- Sealing Feature
- Ensures tight seal for leak-free fuel connection
What’s in the Box
- 1 x Ball Joint (Replaces OEM 663-85518-00)
Installation Notes
- Shut off the fuel supply and relieve any pressure in the fuel line.
- Place a rag under the connection point to catch any residual fuel.
- Disconnect the old fuel connector by depressing the release mechanism and pulling it off the male fitting.
- Inspect the male fitting on the engine for any damage or debris; clean if necessary.
- Firmly push the new connector onto the fitting until it clicks and locks into place.
- Reconnect the fuel supply, prime the system, and check for leaks before starting the engine.
Troubleshooting & FAQ
How do I know if this connector fits my engine?
This part fits various Yamaha and Parsun outboards. To confirm, check the "Engine & Model Compatibility" table and compare the OEM part number 663-85518-00 with the recommendations in your engine's service manual.
What are the signs of a failing fuel connector?
Common signs include fuel leaks at the connection point, a smell of gasoline around the engine, difficulty starting, or the engine stalling due to an air leak. A loose or damaged locking clip is also an indicator.
Is this connector resistant to modern ethanol-blended fuels?
Yes, the housing materials and seals are designed to be compatible with standard marine gasoline, including common ethanol blends (E10).
How often should a fuel line connector be replaced?
There is no fixed replacement interval. You should replace it if you see any cracks, deep scratches, leaks, or if the locking mechanism feels loose or fails to engage securely. We recommend inspecting it annually.
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
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