18-2644 Seal Kit for MerCruiser Stern Drive Alpha I Gen II 1998 & UP Sierra | SeaSierra
18-2644 Seal Kit for MerCruiser Stern Drive Alpha I Gen II 1998 & UP Sierra | SeaSierra is backordered and will ship as soon as it is back in stock.
Couldn't load pickup availability
Worry-free returns
Worry-free returns
Shop with confidence. If you’re not completely satisfied, eligible items may be returned within the return window, provided they are unused and in original packaging.
If the return is due to our error or a defective item, we’ll make it right.
Please contact us before returning any item.
Delivery and Shipping
Delivery and Shipping
Orders are typically processed within 1–2 business days.
U.S. orders usually arrive within 6–15 days, depending on stock location and destination.
International delivery times may vary due to customs processing.
Tracking information will be provided once your order ships.
Product Details
- SKU: 182644
- Brand & Manufacturer: SeaSierra
- Category: Drive Parts / Seal Kits, Oil Seals
- Part Type: Upper Unit Seal Kit
- Item Weight: 0.175
-
Package Dimensions:
- Height: 1.2
- Depth: 5.85
- Width: 6.95
Compatibility
This kit is compatible with the following MerCruiser models:
- Alpha I Gen II: 1991-1995 (0D469859 - 0F679999)
- Alpha I Gen II: 1996-1997 (0F680000 - 0K999999)
- Alpha I Gen II: 1998 & Up
Part Numbers and Replacements
- Replaces OEM Part Numbers: Mercury 26-88397A1
- Replaces Sierra Part Number: 18-2644
- GLM Part Number: 87501
- Equivalent Kit: Not specified
- Other Replaced Part Numbers: Mallory 9-74302
Kit Components
The package includes the following items:
- Grommet (26-88397)
- Gasket (12-19183)
- O-Ring (325-32546)
- O-Ring (25-35027)
- O-Ring (25-70937)
- O-Ring (25-25439) - 2 pieces
- Oil Seal (26-66302) - 2 pieces
- Oil Seal (26-823894)
- Seal (26-45577-1)
Additional Information
- Description: It can repair the oil leak that empties the oil monitor on the alpha 1 leg.
- Interchangeable with: Mercury 26-88397A1, GLM 87501, Mallory 9-74302, Sierra 18-2644
- Guaranteed: Timeliness, Safe and Convenient
- Unit of Measure: EA
- Item Status: A
- Case Packaging: 1
- Standard Packaging: 1
- HSC: 401693
- ECCN: 4016.93.1020
-
Additional Part Numbers:
- Drain Screw Gasket (18-2430-9, 18-2945-9) - Priced Per Pkg of 5
- Seal Ring (18-2944-9) - Priced Per Pkg of 2
- O-Ring (18-7169-9, 18-7161-9, 18-7153-9, 18-7420-9, 18-7117) - Priced Per Pkg of 5
- Check Valve Kit (18-2715)
- Oil Seal (18-2003, 18-2056)
- Double Lip Seal (18-3289)
Payment & Security
Payment methods
Your payment information is processed securely. We do not store credit card details nor have access to your credit card information.






