Lower Gear Case Seal Kit 816575A3 18-2646-1 for MerCruiser Alpha One Gen 2 Sterndrive
Lower Gear Case Seal Kit 816575A3 18-2646-1 for MerCruiser Alpha One Gen 2 Sterndrive
Product Overview
Lower gear case seal kit for MerCruiser Alpha One Gen II sterndrives, supplied as 1 x complete seal and gasket set for the lower unit. It replaces MerCruiser 26-816575A3 and 26-816575A1, Sierra 18-2646-1, GLM 87511, Mallory 9-74206, SEI 95-116-11K and OBR SK-816. The lower unit seals keep gear oil in and water out, so a failed seal shows up as milky gear oil, an oil slick under the drive, or a slow leak at the prop shaft after a season in the water.
Specifications & Attributes
| Specification | Detail |
|---|---|
| Condition | New / New with tags |
| Type | Lower Gear Case Seal Kit (with base) |
| Engine Type | MerCruiser Alpha One Gen II sterndrive |
| Contents | Complete seal and gasket set for the gear case |
| Fits Years | 1991 and up, by serial range |
| Warranty | Standard |
OEM Cross Reference
| Brand | OEM Part Numbers |
|---|---|
| MerCruiser | 26-816575A3, 26-816575A1, 816575A3, 816575A1, 76868A04 |
| Sierra | 18-2646-1 |
| SEI | 95-116-11K |
| OBR | SK-816 |
| Mallory | 9-74206 |
| GLM | 87511 |
Compatible Engines
Fits MerCruiser Alpha One Gen II sterndrives in these serial ranges:
| Drive | Years | Serial Range |
|---|---|---|
| Alpha One Gen II | 1991-1995 | 0D469859 thru 0F679999 |
| Alpha One Gen II | 1996-1997 | 0F680000 thru 0K999999 |
| Alpha One Gen II | 1998 and up | 0L100040 and up |
What's Included
| Component | Qty |
|---|---|
| Lower Gear Case Seal Kit (with base gasket) | 1 |
Condition & Warranty
| Item | Detail |
|---|---|
| Condition | New / New with tags |
| Warranty | Standard |
| Packaging | Sealed retail packaging |
Before You Buy
- Verify your drive model and serial number before ordering
- Fits Alpha One Gen II only — not Gen I or Bravo drives
- Pressure test the lower unit after fitting to confirm the seals hold
- Supplied as a seal and gasket set — bearings and gears are not included
- 30-Day Easy Returns
- Free Worldwide Shipping
- OEM Quality Without the Markup
Verfügbarkeit für Abholungen konnte nicht geladen werden
Boat Owners' Review
Before You Buy
Frequently Asked Questions
What is your refund policy?
We offer a 14-day hassle-free return on all products. Items must be unused and in original packaging. Every XRmarine part is also covered by our 1-year warranty against manufacturing defects. If something is not right, email us at info@xrmarineparts.com — replacement or full refund, your choice.
See our full Refund Policy for complete details.
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Free international shipping on every order — no minimums. We operate a global warehouse network with a main distribution centre in Asia (10-20 business days). We also hold stock in regional warehouses across the United States, Germany, the United Kingdom, Australia, and Poland (opening soon) — most orders arrive in 1-3 business days within those countries and in 2-8 business days to nearby regions. Tracking included.
See our full Shipping Policy.
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