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Sierra 18-2629 Lower Unit Seal Kit for Mercury/Mariner Outboards Gaskets & Seals - 18-25HP

Part of: Sierra Lower Unit Seal Kit for Johnson/Evinrude Outboards Gaskets & Seals

Other options in this family: Sierra 18-2656 Sierra 18-2655 Sierra 118-2655 Sierra 18-2660 Sierra 118-2682

Manufacturer

Picture for manufacturer Sierra

Part Number

18-2629
11 reviews
Sale Price

$82.69

In Stock (7)

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Usually delivered within 2 days

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Product Details

The Sierra 18-2629 Lower Unit Seal Kit is a comprehensive gearcase seal kit engineered to meet or exceed OEM specifications for Mercury and Mariner 18–25HP two-stroke outboard motors. Designed as a direct replacement for Mercury OEM part number 26-85090A1, this kit provides everything needed to reseal the lower unit gearcase and restore proper function during routine maintenance or gear oil leak repair.

Key Features:

  • Meets or exceeds OEM specifications for fit, form, and function
  • Replaces Mercury/Mariner OEM part number 26-85090A1
  • Cross-references: GLM 87575
  • Engineered for Chrysler, Force, Mercury, and Mariner outboard applications
  • Includes all necessary seals, o-rings, gaskets, washers, and hardware for a complete lower unit reseal

Kit Contents Include:

  • Seal 26-33467 (Qty 2) — Sierra 18-2006
  • Washer 12-86645 (Qty 2) — Sierra 18-2560
  • Gear Housing to Face Plate Gasket 27-99326-1 (Qty 1) — Sierra 18-2562
  • Boot 85552 (Qty 1) — Sierra 18-2742
  • Washer 12-20260 (Qty 2) — Sierra 18-2945
  • O-Ring 25-35276 (Qty 1) — Sierra 18-7135
  • O-Ring 25-69202 (Qty 1) — Sierra 18-7419
  • Additional seals per kit configuration — Sierra 18-7956

OEM & Cross-Reference Part Numbers:

  • Mercury/Mariner OEM: 26-85090A1
  • Sierra: 18-2629
  • GLM: 87575

Sierra International is a trusted supplier of aftermarket marine engine parts, providing quality components to OEM engine manufacturers and boat builders. The Sierra 18-2629 kit is an economical, reliable alternative to the factory seal kit for Mercury and Mariner lower unit gearcase maintenance.

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Quick and easy. Great Prices.

Bought an adjustable proportioning valve. Autoplicity was the cheepest source by several dollars. Haven't got it yet, but I did get an e-mail with-in 24 hours that stated that it had been shipped. As long as I get what I've ordered I would say that they are worth giving a shot.

Not receive my order yet because I just made my order but so far the website is very professional love it and have amazing price

So far so good

Great experience! !!!

good, but would like something that tells you whats the cut off time for over night shipping

Great and Easy to Use Website

Great pricing, fast ship A+++

Found the best price on my High Rock 4x4 Overhead Rack. They even discounted the shipping for me. Quick to ship and provide tracking info. Very happy with the way this company operates.

Very fast shipping! I got an email saying it was shipping 2 days after I placed my order, when I checked the tracking it was already delivered to my house! Will shop again.

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