Mercury Seal – 6.79 Feet – 8177121

The Mercury Seal 6.79 Feet (8177121) is an OEM-quality trim seal designed to provide a watertight barrier between your engine components and external elements. Engineered for long-lasting performance, this genuine Mercury part is essential for keeping moisture, debris, and corrosion at bay in marine environments.

Key Features

Precision-Cut OEM Seal – Measures 6.79 feet for accurate fitment and easy installation

Durable Marine-Grade Material – Built to resist cracking, shrinking, and degradation from sun or salt exposure

Effective Moisture Barrier – Seals tightly to keep water and contaminants out of critical engine compartments

Genuine Mercury Part – Ensures a factory-level seal and secure replacement

Part Number: 8177121 – Ideal for matching with official Mercury diagrams and manuals

Compatibility

The Mercury Seal 6.79 Feet – 8177121 fits a range of Mercury outboards and MerCruiser sterndrives. Always verify your engine model and serial number with a Mercury parts reference guide to ensure proper fitment.

Ideal Use Cases

Replacing worn or damaged trim seals

Preventing corrosion or water intrusion in engine housings

OEM restoration and maintenance projects

Ensuring consistent performance during exposure to harsh marine conditions

Why Trim Seals Matter

The integrity of your outboard or sterndrive's sealing components is critical for preventing long-term engine damage. Using Mercury-certified parts like the Seal 6.79 Feet – 8177121 guarantees the right material, length, and performance for your boat’s specific application. Substandard seals may lead to premature wear, moisture buildup, or costly repairs.

Frequently Asked Questions

Is this seal pre-cut or can it be trimmed to fit?

It comes pre-measured at 6.79 feet for precise fitment. If needed, it can be carefully trimmed to match specific installation points.

What models is this Mercury seal compatible with?

Compatibility varies—check your engine’s parts diagram using the 8177121 part number to confirm.

Can I install this seal myself or do I need a technician?

Many DIY boat owners can install this seal with basic tools, but if you're unsure about placement or sealing technique, consult a certified marine technician.

• Supersessions
  817712003, 817712003