Description

Mercury 88397 is a genuine OEM seal commonly identified as a water tube seal for selected Mercury and MerCruiser applications. This listing is for a pack of 2, which matches how this part is often sold for applicable service work.

Key Features

• Genuine Mercury Marine / Quicksilver OEM part
• Part number 88397
• Common Mercury shorthand: 26-88397
• Commonly sold as 2 seals per service quantity / pack of 2
• Commonly described as a water tube seal

Engine Compatibility
This seal is associated with a broad range of selected Mercury and MerCruiser applications, including Alpha One Gen II sterndrive assemblies and certain 2.5L EFI / EFI Offshore, XR2 Magnum, S2000, SST 120, Vazer, and some 3.4L / 250–300 HP performance outboard applications, depending on model and serial range. Fitment should always be confirmed by exact model and serial number before ordering.

Serial Number Fitment Notice
Please confirm compatibility in the Mercury Parts Catalog using your exact engine or drive serial number before purchase. Mercury’s catalog is organized by model and serial number for accurate parts lookup.

When This Part Needs Replacement
Replace this seal when the original is worn, hardened, leaking, damaged during service, or being renewed during water tube, cooling-system, or related gearcase / sterndrive service. A worn water tube seal can contribute to cooling-water leakage and reduced sealing integrity in the water delivery path.

Installation Notes
Install only the exact seal specified for the application being serviced. Because this part is used in multiple Mercury and MerCruiser assemblies, serial-number-based confirmation is the safest way to ensure correct fit. For this listing, 2 seals are included.

Alternate / Superseded Part Numbers

• 26-88397
• Sierra cross-reference: 18-2095
• GLM cross-reference: 12831
• Mallory cross-reference: 9-74302

Parts Desk Insight
Water tube seals are small parts, but they matter anytime cooling water has to move cleanly between connected components. Replacing them during service is a smart way to help maintain proper sealing and avoid repeat teardown work.

Shipping: Ships same or next day for fast Canada wide shipping.