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

Engineered specifically for Mercury Marine engines, this component ensures reliable operation across all engine RPM ranges. Part number 99080M 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 99080M undergoes rigorous Mercury Marine quality testing that aftermarket manufacturers skip. The result? Reliable performance season after season.

FITS: 30HP MARINER

• Fits MARINER 30HP engines
• Compatible HP: 30HP
• Covers 4 serial number ranges
• Configurations: Outboard
• OEM genuine Mercury Marine part

COMPLETE SERIAL NUMBER COMPATIBILITY:

30HP Models

• 30HP OUTBOARD (Mariner)

Not sure where to find your engine’s serial number? View our serial number location guide to quickly locate it on your Mercury engine.

Double-check compatibility for part 99080M using our parts finder tool. Still need assistance? No worries – contact us via the buttons at the bottom of this page (text, call, or email).

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