Mercury Thermostat - 8M0174561

Mercury Thermostat - 8M0174561

140 degrees Fahrenheit (60 degrees Celsius) thermostat sold individually. Thermostats regulate the engine temperature, preventing overheating by ensuring proper flow, which can lead to significant damage if the thermostat fails to open or remains stuck closed. 

• Housing incorporates a 90 degree bend on the outflow side and internal stainless steel thermostat
• Housing and thermostat only. The additional seals, gaskets, clamps and attaching hardware sold separately

Fits: 

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  • 1 Required
• 200-300HP 2.6L L6 Verado 4-stroke (G1-G4) (SN 2B144122 & Below)
  • 1 Required
• 200-300HP 2.6L L6 Verado 4-stroke (G5) (SN 2B144123 & Above)
  • 1 Required
• 350-400HP 2.6L L6 Verado 4-Stroke (SN 2B141617 &  Above)
  • 1 Required
• 350HP SCI 2.6L L6 4-Stroke (SN 1B716557 – 2B43542)
  • 1 Required
• 400R 2.6L L6 4-Stroke (SN 2B141124 & 3B342962)
  • 1 Required