Mercury MerCruiser Quicksilver Alpha One Gen II Lower Gear-Housing Seal Kit 816575A3
In stock items ship same or next day.
Free returns on all eligible orders
You have 30 days to request a return. All sale items are final sale.
Product Description
Mercury MerCruiser Quicksilver 26-816575A3 is the lower gear-housing seal kit for specified MerCruiser Alpha One Gen II sterndrives. It groups the sealing components used when resealing the gearcase during repair or overhaul.
Key Features
- OEM lower gear-housing seal kit, 26-816575A3.
- Includes gear-housing oil seals and O-rings for the specified bushing, carrier and coupling locations.
- Supersedes 26-816575A1.
- GTIN: 745061318892.
Product Compatibility
Verified diagram applications include Alpha One Gen II 1996–1997, serials 0F680000–0K999999, and 1998-and-up, serials 0L100040 and above. The kit also appears in applicable counter-rotation gear-housing diagrams. Match the drive serial number and lower-unit configuration.
Replacement and Installation
Use the appropriate gearcase pressure/vacuum test to locate leaks before disassembly. Inspect seal-running surfaces and housings during the repair, install each seal in the specified orientation and depth, and use the required service tools. Verify sealing before refilling the gearcase with the specified lubricant.
Parts Desk Insight
This kit is for the lower gear housing. Upper-drive seals and a water-pump rebuild kit have separate part references.
Manufacturer Parts Lookup
Use Mercury’s official parts finder to check the part against your engine or drive serial number.
Shipping information
In-stock and OEM parts: ship same or next business day.
Locally warehoused items: ship within 1-3 business days.
Special-order items: timeline confirmed after order.
Returns & warranty
Returns & Satisfaction Guarantee
We stand firmly behind the quality of every product we sell. Your confidence matters to us — and we back it with a straightforward 30-Day Satisfaction Guarantee.
If you are not fully satisfied, you may request a return within 30 days of delivery. All returns must receive pre-approval prior to being sent back. Unauthorized returns will not be accepted.
To qualify for a return:
Item must be in new, unused condition
Product must be in its original packaging
All parts, components, hardware, manuals, and accessories must be included
Packaging must be undamaged and suitable for resale
Important:
Electronics are strictly inspected. No returns on open-box electronics. Exceptions may apply only with prior written approval. Any electronic unit that has been installed, powered, activated, or altered may not be eligible for return.
We are serious about product integrity — and equally serious about taking care of our customers. If there is ever a product issue, contact us immediately so we can make it right.
For return authorization, please contact our support team before shipping anything back.