Don’t gamble with your Mercury’s reliability. This genuine GASKET SET ensures long-term performance and protects your investment in quality marine power.

Factory-built to exact Mercury Marine specifications, this gasket ensures reliable operation across all engine RPM ranges. Part number 78028A78 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 78028A78 delivers consistent performance because it’s built right — the same way Mercury does it at the factory.

Compatible Mercury Marine Engines

FITS: 35-402HP MERCURY

• Fits MERCURY 35-402HP engines
• Compatible HP: 35HP, 402HP
• Covers 11 serial number ranges
• Configurations: Outboard
• OEM genuine Mercury Marine part

COMPLETE SERIAL NUMBER COMPATIBILITY:

35HP Models

• 35HP OUTBOARD (Mercury): 6445653-0B110788

402HP Models

• 402HP OUTBOARD (Mercury): 4860103-5556229, 7112423-7144762, 8052125-8064749, 9184451-9251455

Don’t know where your serial number is? Our quick reference guide shows exactly where to find it on Mercury Marine engines.

Verification & Support

Not sure if part 78028A78 fits your engine? Try our parts finder tool — it’s quick and easy. Need expert help? Contact us using the buttons at the bottom of this page – text, call, or email, whatever works best for you

Four decades of marine parts experience. Low prices, fast shipping – most orders placed by 1pm ship today.