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FLASHSALE26

18-2628 Seal Kit for Mercury Mariner Force 3.9-9.8 HP | SeaSierra

Sale price $42.97 Regular price $60.00

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

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.

If you have any questions, feel free to email us at info@sierramarines.com, and we’ll get back to you within 20–36 hours.

Product Details

  • SKU: 182628
  • Brand & Manufacturer: SeaSierra
  • Category: Gearcase Seal Kit
  • Part Type: Seal Kit for Outboard Lower Units

Compatibility

This gearcase seal kit is compatible with the following Mercury, Mariner, and Force outboard lower units:

  • 3.9-9.8 HP: 1975-1986

Part Numbers and Replacements

  • Replaces OEM Part Numbers: 26-77066A1
  • Interchangeable with:
    • GLM 87574
    • Mallory 9-74212
    • Mercury Marine 26-77066A1

Kit Components

The package includes the following items:

  1. Sierra 18-0584 Oil Seal
  2. Sierra 18-2010 Oil Seal
  3. Sierra 18-2945 Drain Screw Gasket
  4. Sierra 18-4261 Washer
  5. Sierra 18-7116 O-Ring
  6. Sierra 18-7120 O-Ring
  7. Sierra 18-7156 O-Ring
  8. Sierra 18-7168 O-Ring
  9. Sierra 18-7171 O-Ring
  10. Sierra 18-7180 O-Ring
  11. Sierra 18-8308 Shift Shaft Oil Seal
  12. Sierra 18-8310 Water Pump Base Seal
  13. Sierra 18-0516 Oil Seal
  14. Three additional Seals
  15. One Bushing

Additional Information

  • The product is designed specifically for Mercury engines.
  • Each Sea Sierra product meets or exceeds the original equipment part it replaces.
  • Ensure to check part numbers for proper fit.

Payment & Security

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