Restore factory performance to your Mercury engine with this OEM **THERMOSTAT COVER | USE WITH 90 DEGREE ELBOW COMPONENT OF POWERHEAD [823291A94] OR [809794A97] OR [809793A97]**. Engineered to exact specifications for reliable operation in fresh and saltwater conditions.

Engineered specifically for Mercury Marine engines, this component ensures reliable operation across all engine RPM ranges. Part number 19801A1 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 19801A1 undergoes rigorous Mercury Marine quality testing that aftermarket manufacturers skip. The result? Reliable performance season after season.

FITS: 225-300HP MARINER, MERCURY, RACE OUTBOARD (MARATHON)

• Fits MARINER, MERCURY, RACE OUTBOARD 225-300HP engines
• Compatible HP: 225HP, 250HP, 300HP
• Model types: MARATHON
• Covers 19 serial number ranges
• Configurations: Outboard
• OEM genuine Mercury Marine part

COMPLETE SERIAL NUMBER COMPATIBILITY:

225HP Models

• 225HP MARATHON (Mariner): 0G245605-0G760299, 0G760300-0T408999
• 225HP OUTBOARD (Mariner): 0D280813-0G760299, 0G760300-0T408999, 0G129222-0G760299, 0G760300-0T408999
• 225HP OUTBOARD (Mercury): 0D280813-0G760299, 0G760300-0T408999, 0G129222-0G760299, 0G760300-0T408999
• 225HP SEAPRO (Mercury): 0G245605-0G760299, 0G760300-0T408999

250HP Models

• 250HP OUTBOARD (Mariner): 0G129222-0G760299, 0G760300-0T408999
• 250HP OUTBOARD (Mercury): 0G129222-0G760299, 0G760300-0T408999, 0G980600-0T800999

300HP Models

• 300HP OUTBOARD (Race Outboard): 0G610221-0T105297, 0G610221-0T105297

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

Questions about part 19801A1? 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.

Trusted Mercury Marine parts specialist since 1985. Fast shipping on discount-priced genuine Mercury parts – most orders ship same day.