Extend your Mercury engine’s life with this premium OEM **SEAL, CYLINDER**. Factory-engineered for durability in harsh marine conditions that destroy inferior parts.

Precision-engineered for Mercury outboards, this seal ensures reliable operation across all engine RPM ranges. Part number F40278 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.

Genuine Mercury Marine part F40278 isn’t just a replacement – it’s an investment in your engine’s longevity. Factory engineering ensures optimal performance while cheap alternatives lead to repeated repairs.

FITS: 100-115HP CHRYSLER

• Fits CHRYSLER 100-115HP engines
• Compatible HP: 100HP, 105HP, 115HP
• Covers 24 serial number ranges
• Configurations: Outboard
• OEM genuine Mercury Marine part

COMPLETE SERIAL NUMBER COMPATIBILITY:

100HP Models

• 100HP OUTBOARD (Chrysler)

105HP Models

• 105HP OUTBOARD (Chrysler)

115HP Models

• 115HP OUTBOARD (Chrysler)

Need help finding your serial number? Check our serial number location guide for step-by-step instructions on locating it on your engine.

Verify part F40278 works with your Mercury using our parts finder tool. Have questions? Reach out using the contact buttons at the bottom of this page – our team is here to help by text, call, or email.

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