Stop fighting with your Mercury engine. This factory-spec FSM SEAL KIT eliminates common issues and delivers the smooth operation you expect from genuine OEM components.

Designed and manufactured to Mercury Marine OEM standards, this seal ensures reliable operation across all engine RPM ranges. Part number 8M0057679 is manufactured to exact Mercury Marine factory specifications for precision installation and optimal performance. Constructed from premium marine-grade materials designed to withstand harsh saltwater and freshwater environments.

Cut-rate alternatives might look similar, but they’re not engineered to Mercury’s exacting standards. Part 8M0057679 delivers consistent performance because it’s built right — the same way Mercury does it at the factory.

Compatible Mercury Marine Engines

FITS: 4-150HP MARINER, MERCRUISER, MERCURY (EFI)

• Fits MARINER, MERCRUISER, MERCURY 4-150HP engines
• Compatible with 8 different HP configurations
• Model types: EFI
• Covers 16 serial number ranges
• Configurations: Jet Drive, Outboard
• OEM genuine Mercury Marine part

COMPLETE SERIAL NUMBER COMPATIBILITY:

4HP Models

• 4HP OUTBOARD (Mercruiser)

65HP Models

• 65HP JET (Mercury)

75HP Models

• 75HP EFI (Mariner)
• 75HP EFI (Mercury)

80HP Models

• 80HP EFI (Mariner)
• 80HP EFI (Mercury)
• 80HP JET (Mercury)

90HP Models

• 90HP EFI (Mariner)
• 90HP EFI (Mercury)

100HP Models

• 100HP EFI (Mariner)
• 100HP EFI (Mercury)

115HP Models

• 115HP EFI (Mariner)
• 115HP EFI (Mercury)

150HP Models

• 150HP OUTBOARD (Mariner)
• 150HP OUTBOARD (Mercury)

Not sure where to find your engine’s serial number? View our quick reference guide to locate it on your Mercury Marine engine.

Verification & Support

Verify part 8M0057679 works with your Mercury using our parts finder tool. Have questions? Reach out using the contact buttons at the bottom of this page — our team is here to help by text, call, or email

40+ years of marine expertise. Low prices, fast shipping – most orders placed by 1pm ship today.