Why pay dealer markup? Get genuine Mercury Marine quality at discount pricing. This GASKET COMPONENT OF POWERHEAD GASKET SET [27-96658] [MANUAL] ; [27-811996M] [ELECTRIC] delivers OEM reliability with savings up to 20% below retail.

Designed and manufactured to Mercury Marine OEM standards, this gasket ensures reliable operation across all engine RPM ranges. Part number 80590M 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.

Aftermarket parts might save a few dollars upfront, but genuine Mercury Marine part 80590M saves you money long-term by lasting years instead of months. Factory precision means perfect fit — no modifications, no surprises.

Compatible Mercury Marine Engines

FITS: 20-28HP MARINER

• Fits MARINER 20-28HP engines
• Compatible HP: 20HP, 25HP, 28HP
• Covers 24 serial number ranges
• Configurations: Outboard
• OEM genuine Mercury Marine part

COMPLETE SERIAL NUMBER COMPATIBILITY:

20HP Models

• 20HP OUTBOARD (Mariner)

25HP Models

• 25HP OUTBOARD (Mariner)

28HP Models

• 28HP OUTBOARD (Mariner)

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

Want to verify compatibility for part 80590M? 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

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