• Free shipping

  • Free help & advice

  • Hassle-free returns

  • Factory direct prices

Flash Sale now on!

FLASHSALE23

18-2789 Lower Unit Seal Kit Compatible with Yamaha 25 Hp 1997-02 | Sea Sierra

Sale price $39.90 Regular price $48.00
Shipping calculated at checkout.

Worry-free returns

You may return most new, unopened items within 30 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: 182789
  • Brand & Manufacturer: Sea Sierra
  • Category: Drive Parts / Seal Kits, Oil Seals
  • Part Type: Lower Unit Seal Kit
  • Packaging Dimensions
    • Weight: 0.225 lbs
    • Height: 0.45 inches
    • Depth: 9.9 inches
    • Width: 12.95 inches

Compatibility

This Lower Unit Seal Kit is compatible with Yamaha 25 Hp engines produced in the years 1997-2002 (WSM 18-2789).

Kit Components

The package includes the following components suitable for Yamaha 25 Hp engines:

  • Gasket, Upper Casing (6J8-W0001-20-00)
  • Gasket, Upper Casing (6J8-W0001-21-00)
  • Gasket, Upper Casing (6J8-W0001-22-00)
  • Gasket, Upper Casing (6J8-W0001-C2-00)
  • O-Ring
  • O-Ring
  • Drain Fill Washer (18-4698)
  • Drain Fill Washer
  • Gasket, Water Pump (18-0292)
  • Gasket, Water Pump
  • Gasket, Water Pump (18-0294)
  • Gasket, Water Pump
  • O-Ring (18-0298)
  • O-Ring
  • Oil Seal (18-0297)
  • Oil Seal
  • Oil Seal (18-0554)
  • Oil Seal
  • Gasket, Water Pump (18-99149)
  • Gasket, Water Pump

Part Numbers and Replacements

  • Replaces OEM Part Numbers:
    • 6J8-W0001-21-00
    • 6jW0001-C2-00

Additional Information

  • High Performace Quality OEM Style Gaskets.
  • Gaskets and seals meet OEM standards or higher.
  • Please be advised that Mercury/Mariner motors DO NOT go by the year they were produced. So please check all information available such as the following to identify your engine to the correct part.
  • If you are looking for performance parts, we offer the best distinguished brands and handpick the parts that we know work and use daily.

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.