Stop fighting with your Mercury engine. This factory-spec THERMOSTAT, 60 Degrees COMPONENT OF POWERHEAD/PARTIAL ENGINE[895274A06] eliminates common issues and delivers the smooth operation you expect from genuine OEM components.

Manufactured to strict Mercury Marine quality standards, this thermostat ensures reliable operation across all engine RPM ranges. Part number 855676002 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 855676002 undergoes rigorous Mercury Marine quality testing that aftermarket manufacturers skip. The result? Reliable performance season after season.

Compatible Mercury Marine Engines

FITS: 8-30HP MARINER, MERCURY (EFI)

• Fits MARINER, MERCURY 8-30HP engines
• Compatible with 7 different HP configurations
• Model types: EFI
• Covers 22 serial number ranges
• Configurations: Jet Drive, Outboard
• OEM genuine Mercury Marine part

COMPLETE SERIAL NUMBER COMPATIBILITY:

8HP Models

• 8HP OUTBOARD (Mariner)
• 8HP OUTBOARD (Mercury)

9HP Models

• 9HP OUTBOARD (Mariner)
• 9HP OUTBOARD (Mercury)

10HP Models

• 10HP OUTBOARD (Mercury)

15HP Models

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

20HP Models

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

25HP Models

• 25HP EFI (Mariner)
• 25HP EFI (Mercury)
• 25HP JET (Mercury)
• 25HP SEAPRO (Mercury)

30HP Models

• 30HP EFI (Mariner)
• 30HP EFI (Mercury)

Don’t know where your serial number is? Our quick reference guide shows exactly where to find it on Mercury Marine engines.

Verification & Support

Verify part 855676002 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

Serving boaters for over 40 years. Low prices, fast shipping – most orders placed by 1pm ship today.