Seal Kit, Gear Housing – Fits Yamaha F45/F50/FT50/T50 Outboard (Replaces 64J-W0001-20-00)
Seal Kit, Gear Housing – Fits Yamaha F45/F50/FT50/T50 Outboard (Replaces 64J-W0001-20-00) 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 Seal Kit, Gear Housing provides all necessary components to service the lower unit gearcase on compatible Yamaha outboards. It is designed for a precise fit on Yamaha F45, F50, T50, and FT50 four-stroke models manufactured from 2001 to the present.
This kit serves as a direct replacement for Yamaha OEM part numbers 64J-W0001-20-00 and 69J-W0001-20-00.
- Installation Location: Lower Unit / Gearcase
- Environment: Designed for both saltwater and freshwater marine use
Part Number Matrix
Use this matrix to confirm equivalent references across OEM and aftermarket.
| Brand | Part Number |
|---|---|
| Yamaha | 64J-W0001-20-00 |
| Yamaha | 69J-W0001-20-00 |
Engine & Model Compatibility
Confirm your engine model/year in the table below.
This seal kit is designed for the following Yamaha outboard models:
| Brand | Model | Rated HP | Stroke | Years | OEM Part No. | Notes |
|---|---|---|---|---|---|---|
| Yamaha | F45 | 45 | 4-Stroke | 2001–Current | 64J-W0001-20-00 | Also fits 69J-W0001-20-00 |
| Yamaha | F50 | 50 | 4-Stroke | 2001–Current | 64J-W0001-20-00 | Also fits 69J-W0001-20-00 |
| Yamaha | T50 | 50 | 4-Stroke | 2001–Current | 64J-W0001-20-00 | Also fits 69J-W0001-20-00 |
| Yamaha | FT50 | 50 | 4-Stroke | 2001–Current | 64J-W0001-20-00 | Also fits 69J-W0001-20-00 |
Technical Specs
- Product Type
- Gear Housing Seal Kit
- Installation
- Lower Unit / Gearcase
- Dimensions
- 14.0 x 22.0 x 3.0 (cm)
- Weight
- 0.07 kg (0.15 lb)
- Other Technical Attributes
- Designed for marine saltwater and freshwater environments
- Warranty
- Standard manufacturer warranty
What’s in the Box
- 1 x Complete Seal Kit for Yamaha Gear Housing (Replaces 64J-W0001-20-00)
Installation Notes
- Always disconnect the battery and drain the gearcase oil before beginning work.
- Remove the lower unit assembly from the outboard engine.
- Carefully disassemble the gearcase to access the propeller shaft and driveshaft areas.
- Remove all old seals, o-rings, and gaskets. Thoroughly clean all mating surfaces, removing any old sealant or corrosion.
- Lightly lubricate the new seals with marine-grade grease before installation.
- Use appropriate seal driver tools to press the new seals into place evenly and without damage.
- Reassemble all components, torquing fasteners to the manufacturer’s specifications.
- Reinstall the lower unit, refill with new gear oil to the correct level, and inspect for leaks before operating.
Troubleshooting & FAQ
How do I know if this kit fits my Yamaha outboard?
Check your engine model and year against the compatibility table. This kit is a confirmed fit for Yamaha F45, F50, T50, and FT50 four-stroke models from 2001–Current. It directly replaces OEM part numbers 64J-W0001-20-00 and 69J-W0001-20-00.
What are the signs of a failing gear housing seal?
Common signs include milky or water-contaminated gear oil (often visible on the dipstick or during a drain), visible oil leaks around the propeller shaft or lower unit casing, or a distinct burning smell from the gearcase due to lubrication failure.
How often should gearcase seals be replaced?
There is no fixed replacement interval. Seals should be inspected for leaks during every lower unit service or oil change. It is recommended to replace them as preventative maintenance every few years (especially in saltwater), or immediately if any signs of failure appear.
Does this kit include all the necessary seals for the job?
Yes, this is a comprehensive gear housing seal kit that includes all the primary seals and gaskets required to service the lower unit on the specified engine models.
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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