Protect your Mercury investment with genuine OEM parts that last. This BEARING SET (Cone & Cup) delivers years of reliable service – not just one season like cheap alternatives.

Built with Mercury Marine’s precision engineering, this seal ensures reliable operation across all engine RPM ranges. Part number 77420A1 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.

Factory parts exist for a reason — they work. Part 77420A1 undergoes rigorous Mercury Marine quality testing that aftermarket manufacturers skip. The result? Reliable performance season after season.

Compatible Mercury Marine Engines

FITS: 30-150HP MARINER, MERCURY (EFI)

• Fits MARINER, MERCURY 30-150HP engines
• Compatible HP: 30HP, 35HP, 40HP, 100HP, 115HP, 150HP
• Model types: EFI
• Covers 24 serial number ranges
• Configurations: Jet Drive, Outboard
• OEM genuine Mercury Marine part

COMPLETE SERIAL NUMBER COMPATIBILITY:

30HP Models

• 30HP EFI (Mariner)
• 30HP EFI (Mercury)
• 30HP JET (Mariner): 0C159200-0G589999
• 30HP JET (Mercury): 0C159200-0G589999

35HP Models

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

40HP Models

• 40HP OUTBOARD (Mariner): 0P094500-0P206999, 0T178500-0T598999
• 40HP OUTBOARD (Mercury): 0P094500-0P206999

100HP Models

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

115HP Models

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

150HP Models

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

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 77420A1? 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

Trusted marine parts specialist since 1985. Competitive pricing, same-day shipping on most orders.