Gear Housing Seal Kit – Fits Yamaha F40-F50 4-Stroke Outboards (Replaces 62Y-W0001-22-00)
Gear Housing Seal Kit – Fits Yamaha F40-F50 4-Stroke Outboards (Replaces 62Y-W0001-22-00) is backordered and will ship as soon as it is back in stock.
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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.).
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Delivery and Shipping
Delivery and Shipping
Free standard shipping on all orders under 1 KG
Product Details
This complete Gear Housing Seal Kit – Fits Yamaha F40-F50 4-Stroke Outboards (Replaces 62Y-W0001-22-00) contains the necessary gaskets, seals, and O-rings to service the lower unit on Yamaha 4-stroke models F40A, F40B, F45AE, F50A, and T50TLR from approximately 2001–2008.
It serves as a direct aftermarket replacement for Yamaha OEM part numbers 62Y-W0001-22-00, 62Y-W0001-21-00, and 62Y-W0001-20-00, as well as several other interchange references.
- Engineered for a direct fit on specified Yamaha outboard models.
- Installation is recommended as part of routine lower unit maintenance or repair.
- Kit includes all parts required for a standard lower unit seal replacement.
Part Number Matrix
Use this matrix to confirm equivalent references across OEM and aftermarket.
| Brand | Part Number |
|---|---|
| Yamaha | 62Y-W0001-22-00 |
| Yamaha | 62Y-W0001-21-00 |
| Yamaha | 62Y-W0001-20-00 |
| Aftermarket | AM62Y-W0001-22 |
| Aftermarket | MAL9-74532 |
| Aftermarket | MAL9-74533 |
| Aftermarket | MAL9-74540 |
Engine & Model Compatibility
Confirm your engine model/year in the table below.
This kit is designed for a range of Yamaha 40–50 HP 4-stroke outboards.
| Brand | Model | Rated HP | Stroke | Years | OEM Part No. | Notes |
|---|---|---|---|---|---|---|
| Yamaha | F40A | 40 | 4-Stroke | 2001–2007 | 62Y-W0001-22-00 | |
| Yamaha | F45AE, AET | 45 | 4-Stroke | 2001–2007 | 62Y-W0001-22-00 | |
| Yamaha | F50A, AET, AED, AEDH, AEHT | 50 | 4-Stroke | 2001–2007 | 62Y-W0001-22-00 | |
| Yamaha | TJR, TJRB | 50 | 4-Stroke | 2001–2007 | 62Y-W0001-22-00 | |
| Yamaha | TLR, TLRA, TLRC, TLRZ, TLHC | 50 | 4-Stroke | 2001–2007 | 62Y-W0001-22-00 | |
| Yamaha | FT50B | 50 | 4-Stroke | 2001–2007 | 62Y-W0001-22-00 | |
| Yamaha | T50TLR | 50 | 4-Stroke | 2001–2007 | 62Y-W0001-22-00 |
Technical Specs
- Product Type
- Lower Unit Gasket Kit / Gear Housing Seal Kit
- Installation
- Replace during lower unit service
- Dimensions
- 6.0" L x 7.0" W x 0.5" H
- Other Technical Attributes
- OEM replacement parts
What’s in the Box
- Complete set of gaskets, seals, and O-rings for one lower unit/gear housing assembly.
Installation Notes
- Drain the gearcase oil completely into a suitable container.
- Remove the propeller assembly.
- Unbolt and carefully detach the lower unit from the outboard's upper casing.
- Systematically disassemble the gear housing, noting the location and orientation of each seal, O-ring, and gasket.
- Thoroughly clean all mating surfaces to remove old sealant, corrosion, or gasket residue.
- Install the new seals and gaskets from the kit, applying marine-grade grease to seal lips and O-rings.
- Reassemble the gear housing, ensuring all components are correctly seated and aligned.
- Reattach the lower unit to the upper casing, torquing bolts to the manufacturer's specification.
- Refill the gearcase with the correct type and amount of new gear lube through the lower drain/fill screw until it emerges from the upper vent screw.
- Reinstall drain and vent screws with new gaskets, and then reinstall the propeller.
Troubleshooting & FAQ
How do I confirm this kit fits my Yamaha engine?
Check your engine's model number and year against the compatibility table provided. For example, this kit fits models like F50A, T50TLR, and F40B within the 2001–2007 year range. If your model is listed, the kit is a confirmed fit. Always verify your OEM part number if possible.
What are the signs of a failing lower unit seal?
The most common sign is "milky" or creamy-looking gear lube, which indicates water intrusion. You may also notice gear oil leaking from the propeller shaft area or around the lower unit case seams. A metallic sheen in the oil can also indicate internal wear caused by water contamination.
How often should I replace my lower unit seals?
There is no fixed replacement interval. It is best practice to replace the seals whenever the lower unit is removed for other service (e.g., water pump impeller replacement). You should also replace them immediately if you detect any signs of leakage or water intrusion.
What makes the part numbers 62Y-W0001-22-00, -21-00, and -20-00 different?
These numbers represent a supersession chain from Yamaha. The -20-00 was the original part number, which was later updated to -21-00, and finally to the current -22-00. They are all functionally identical and interchangeable. This kit replaces all three versions.
Is any special sealant required for installation?
While the gaskets and seals are designed to create a tight seal, some mechanics apply a thin layer of a non-hardening sealant like Yamabond 4, Permatex Aviation Form-A-Gasket, or Loctite 518 to the surfaces of the metal gaskets as an extra precaution against leaks. This is not always required but is considered good practice.
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.
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