Why pay dealer markup? Get genuine Mercury Marine quality at discount pricing. This SEAL 2,5COMPONENT OF ENGINE/POWERHEAD GASKET SET [27-832934A00] :COMPONENT OF POWERHEAD/PARTIAL ENGINE [854198A03] OR [877869A03] 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 818574 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 818574 delivers consistent performance because it’s built right — the same way Mercury does it at the factory.

Compatible Mercury Marine Engines

FITS: 200HP MARINER, MERCURY

• Fits MARINER, MERCURY 200HP engines
• Compatible HP: 200HP
• Covers 24 serial number ranges
• Configurations: Outboard
• OEM genuine Mercury Marine part

COMPLETE SERIAL NUMBER COMPATIBILITY:

200HP Models

• 200HP OUTBOARD (Mariner): 0T750164-0T800999, 0T801000-1B417701, 0G386496-0G589999, 0G590000-0G760299, 0G760300-0G960499, 0G960500-0T178499, 0T178500-0T598999, 0T599000-0T800999, 0T801000-1B417701, 1B417702-1B504988
• 200HP OUTBOARD (Mercury): 0T980000-1B417701, 1B417702-1B504988, 0T750164-0T800999, 0T801000-1B417701, 1B417702-1B504988, 0G386496-0G589999, 0G590000-0G760299, 0G760300-0G960499, 0G960500-0T178499, 0T178500-0T598999, 0T599000-0T800999, 0T801000-1B417701

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

Questions about part 818574? 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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