SEAL, Oil | COMPONENT OF LOWER UNIT GASKET SET [27-804908A00] or [27-803728A99] – 161622

Save hundreds in dealer fees – install this genuine Mercury Marine SEAL, Oil COMPONENT OF LOWER UNIT GASKET SET [27-804908A00] or [27-803728A99] yourself. Our parts experts provide guidance if needed, and you get OEM quality at discount pricing.

Factory-built to exact Mercury Marine specifications, this gasket ensures reliable operation across all engine RPM ranges. Part number 161622 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 161622 delivers consistent performance because it’s built right — the same way Mercury does it at the factory.

Compatible Mercury Marine Engines

FITS: 10-30HP MARINER, MERCURY (EFI)

• Fits MARINER, MERCURY 10-30HP engines
• Compatible HP: 10HP, 15HP, 18HP, 20HP, 25HP, 30HP
• Model types: EFI
• Covers 24 serial number ranges
• Configurations: Jet Drive, Outboard
• OEM genuine Mercury Marine part

COMPLETE SERIAL NUMBER COMPATIBILITY:

10HP Models

• 10HP OUTBOARD (Mercury)

15HP Models

• 15HP OUTBOARD (Mariner): 0N001590-0N055284
• 15HP OUTBOARD (Mercury): 0N001590-0N055284
• 15HP SEAPRO (Mercury): 0R051685-0R123564

18HP Models

• 18HP OUTBOARD (Mercury): 0N001590-0N055284

20HP Models

• 20HP OUTBOARD (Mariner)
• 20HP OUTBOARD (Mercury)

25HP Models

• 25HP EFI (Mariner)
• 25HP EFI (Mercury)
• 25HP JET (Mercury)
• 25HP OUTBOARD (Mariner): 0N018456-0N055504
• 25HP OUTBOARD (Mercury): 0N018456-0N055504
• 25HP SEAPRO (Mercury)

30HP Models

• 30HP OUTBOARD (Mariner): 0N001875-0N055504

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

Want to verify compatibility for part 161622? Use our parts finder tool for instant confirmation. Still have questions? No problem – use the contact buttons at the bottom of this page to reach us by text, call, or email

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