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If your Mercury or Mariner outboard (40 to 60 HP, 3-cylinder models) is running cool or overheating, the thermostat might be stuck.

This kit from Full Spectrum Parts has what you need.

It includes the correct 110°F thermostat and replaces a bunch of OEM numbers: 850055A2, 850055A1, 59078A2, and 13141.

It's brand new in the package.

Just a heads-up, there's a Prop 65 warning for California, but that's pretty standard.

A simple fix to get your engine running at the right temp and keep it happy on the water.




4.5 out of 5