Experiencing engine hesitation or reduced power? This authentic Mercury Marine SEAL Component of Engine Overhaul Gasket Set [27-807756A01] solves the problem with factory precision – no guessing, no compromises.

Engineered to Mercury’s rigorous OEM standards, this gasket ensures reliable operation across all engine RPM ranges. Part number 42077 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 42077 delivers consistent performance because it’s built right — the same way Mercury does it at the factory.

Compatible Mercury Marine Engines

FITS: 10HP MARINER, MERCURY (MAGNUM, MARATHON, SEA PRO)

• Fits MARINER, MERCURY 10HP engines
• Compatible HP: 10HP
• Model types: MAGNUM, MARATHON, SEA PRO
• Covers 24 serial number ranges
• Configurations: Outboard
• OEM genuine Mercury Marine part

COMPLETE SERIAL NUMBER COMPATIBILITY:

10HP Models

• 10HP MAGNUM (Mariner): 0D038000-0D279999, 0D281000-0G760299, 0G760300-0T979999, 0P017000-0P325499, 9596000-9792199, 9792200-0P016999
• 10HP MARATHON (Mariner): 0D038000-0D279999, 0D281000-0G760299, 0G760300-0T979999, 0P017000-0P325499, 0T980000-0T999999, 9596000-9792199, 9792200-0P016999
• 10HP SEA PRO (Mercury): 0D038000-0D279999, 0D281000-0G760299, 0G760300-0T979999, 0P017000-0P325499, 0T980000-0T999999, 9596000-9792199, 9792200-0P016999

Need help finding your serial number? Check our serial number location guide for step-by-step instructions on locating it on your Mercury engine.

Verification & Support

Questions about part 42077? Use our parts finder tool to verify fitment yourself. Prefer to talk to an expert? Use the contact buttons at the bottom of this page to reach our team by text, call, or email

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