There are plenty of options available while buying 140 degree thermostats in the market right now, and if you're confused regarding which one to go for, Your search ends here.

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Our Top Picks:

Best Overall: Buy: Quicksilver 140 Degree Thermostat READ REVIEW

Best Runner Up: Buy: Unknown 140 Degree Thermostat READ REVIEW

Best Original Equipment Design: Buy: Quicksilver New Thermostat READ REVIEW

Best For Good Quality: Buy: Glm 140 Degree Thermostat READ REVIEW

Best Value For Money: Buy: Sierra 140 Degree Thermostat READ REVIEW

Best Overall: Quicksilver 140 Degree Thermostat

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The best part: quicksilver 's 140 degree thermostat is reasonable and it is available to ship in 24 hours. The Quicksilver 140 Degree Thermostat is the premier supplier of mercury marine original equipment replacement engine parts, oils, and accessories, but also works to serve all original equipment brands in the marine and powersports industries. Make sure this fits by entering your model number. In addition, it allows for perfect fit, it comes with complete kit and has a quality design.

Lastly, the quicksilver 140 degree thermostat has been the leader in delivering uncompromising engine oils, parts and accessories to the marine industry for over 65 years.

"You will need to also order a thermostat housing sleeve. " - says, one customer. In conclusion, for most customers, the thermostat was most suitable.

• See your owner's manual for removal of non-functioning thermostat and replacement of a new thermostat.
• This is easy to replace with common shop tools.
• This means buying performance, protection and peace of mind.

Best Runner Up: Unknown 140 Degree Thermostat

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The Unknown 140 Degree Thermostat is long-lasting, rigid and fits well with your regular use like a dream. The unknown 140 degree thermostat comes with part numbers and it fits perfectly. Make sure this fits by entering your model number. Moreover, the thermostat fits 1983 and newer gm v-6 and v-8 engines with standard cooling, requiring 140. Lastly, the unknown 140 degree thermostat includes 140degree thermostat, gaskets, and brass sleeve.

Most buyers agree that the thermostat works with 4cyl 3.0l. In short, many have used the unknown 140 degreethermostat for more than a few months without letup, and it shows no sign of giving up.

• New thermostat kit for mercruiser v6 and v8 engine.
• One of the newcomers and featured product.

Best Original Equipment Design: Quicksilver New Thermostat

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The Quicksilver New Thermostat's material feels more premium than its price would suggest. The quicksilver new thermostat is easy to replace with common shop tools. See your owner's manual or service manual for specific applications and installation instructions. In addition, it buys performance, protection and peace of mind.

The thermostat has earned a loyal following by providing the highest quality products that are tested through some of the most rigorous environments and testing procedures. Finally, the quicksilver new thermostat is for various mercruiser stern drive applications with standard cooling systems.

"Fit thermostat housing shown in the picture. " - says, one customer. Overall, at the price, they believe that they got a steal of a deal with it.

• See your owner's manual for removal of non-functioning thermostat and replacement of a new thermostat.
• Good investment for the long term.

Best For Good Quality: Glm 140 Degree Thermostat

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The Glm 140 Degree Thermostat should be able to handle its purpose and duties with ease. And, this works with part number and it can be trusted for good quality. Make sure this fits by entering your model number. Above all, the glm 140degree thermostat is a perfect fit and it works great.

In conclusion, many customers have used the glm 140 degree thermostat for more than a few months without letup, and it shows no sign of giving up.

• Replaces merc part number: 59078, 59078t3, 59078q3.
• Kit includes: 140° degreethermostat and gasket.
• New and hot releases.

Best Value For Money: Sierra 140 Degree Thermostat

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The Sierra 140 Degree Thermostat's material feels more premium than its price would suggest. Moreover, this is made with the right parts and it can be of good quality. Make sure this fits by entering your model number. Most importantly, the sierra 140 degree thermostat is right, is great for high quality and it has temperature rating.

One customer says - "It's a thermostat and opens and closes when it should. ". Almost all buyers found that the thermostat came with a new gasket.

• About Sierra Sierra is dedicated to protecting you and your investment.
• Fits : mercruiser 140-3.0l (s/n 0l340999 & below) and 165.
• Fits : mercruiser 120/2.5l (s/n 2324347 & up) w/cast iron exhaust manifolds.