• Free shipping

  • Free help & advice

  • Hassle-free returns

  • Factory direct prices

Flash Sale now on!

FLASHSALE25

18-2654 Lower Unit Seal Kit for Mercury, Mariner 35-70 Hp 1977-1989 | SeaSierra

Regular price $999.00
Shipping calculated at checkout.

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.).

You should expect to receive your refund within four weeks of giving your package to the return shipper, however, in many cases you will receive a refund more quickly. This time period includes the transit time for us to receive your return from the shipper (5 to 10 business days), the time it takes us to process your return once we receive it (3 to 5 business days), and the time it takes your bank to process our refund request (5 to 10 business days).

If you need to return an item, simply login to your account, view the order using the "Complete Orders" link under the My Account menu and click the Return Item(s) button. We'll notify you via e-mail of your refund once we've received and processed the returned item.

Delivery and Shipping

Free standard shipping on all orders under 1 KG

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: 182654
  • Brand & Manufacturer: SeaSierra
  • Category: Drive Parts / Seal Kits, Oil Seals
  • Part Type: Lower Unit Seal Kit
  • Weight: 0.14 pounds
  • Height: 1.1 inches
  • Depth: 5.9 inches
  • Width: 6.75 inches
  • UPC: 030999312655

Compatibility

This seal kit is compatible with the following Mercury and Mariner outboard models:

  • 35 hp (2 Cylinder): 6445653 & Up (1984 - 1989)
  • 40 hp (2 Cylinder): 4860103 - 6445652 (1978 - 1983)
  • 40 hp (4 Cylinder): 0C159200 & Up (1989 - Up)
  • 45 hp (4 Cylinder): 5531630 & Up (1986 - Up)
  • 50 hp (4 Cylinder): 4357640 & Up (1976 - Up)
  • 50 hp (3 Cylinder): 6428681 - 0D000749 (1984 - 1990)
  • 60 hp (3 Cylinder): 6428681 - 0D000749 (1984 - 1990)
  • 70 hp (3 Cylinder): 4571652 - 6428680 (1977 - 1983)

Kit Components

The package includes the following components, each suitable for specific engine horsepower ranges:

  1. Lower Unit Seal Kit (Sea Sierra Part #: 18-2654)
    • Replaces OEM Part#: 26-79831A1
    • Replaces Sierra Part #: 18-2654
    • Replaces GLM Part #: 87530
  2. Washer, Shift Shaft (Priced Per Pkg of 5) (Sea Sierra Part #: 18-2316-9)
  3. Drain Screw Gasket (Priced Per Pkg of 2) (Sea Sierra Part #: 18-2945-9)
  4. Gasket, Water Pump Base (Priced Per Pkg of 2) (Sea Sierra Part #: 18-2841-9)
  5. Gasket, Water Pump Base (Sea Sierra Part #: 18-2825)
  6. Gasket, Water Pump (Priced Per Pkg of 2) (Sea Sierra Part #: 18-2824-9)
  7. Lower Water Pump Gasket (Priced Per Pkg of 2) (Sea Sierra Part #: 18-2823-9)
  8. Rubber Washer (Priced Per Pkg of 5) (Sea Sierra Part #: 18-2948-9)
  9. O-Ring (Priced Per Pkg of 5) (Sea Sierra Part #: 18-7153-9)
  10. O-Ring (Priced Per Pkg of 5) (Sea Sierra Part #: 18-7160-9)
  11. O-Ring (Priced Per Pkg of 5) (Sea Sierra Part #: 18-7174-9)
  12. O-Ring (Sea Sierra Part #: 18-7115)
  13. O-Ring (Sea Sierra Part #: 18-7155)
  14. Oil Seal (Sea Sierra Part #: 18-2054)
  15. Oil Seal (Sea Sierra Part #: 18-2011)
  16. Oil Seal (Sea Sierra Part #: 18-2051)
  17. Oil Seal (Sea Sierra Part #: 18-2052)
  18. Oil Seal (Sea Sierra Part #: 18-2055)
  19. Oil Seal (Sea Sierra Part #: 18-2008)
  20. Oil Seal (Sea Sierra Part #: 18-2048)

Additional Information

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.