Marine thermostats

As the leading aftermarket parts supplier, Marine Parts China provides a comprehensive range of inboard/outboard thermostats compatible with major marine engine brands including Yamaha, Honda, Suzuki, Mercury Mercruiser, OMC, Volvo Penta and Yanmar. Our goal is to deliver exceptional quality products and attentive service to both our distributors and their valued customers.

Quality Assurance

  • Extensively tested for durability and reliability, meeting strict OEM specifications for a precise fit and OE-quality function
  • Withstands 500 hours of salt spray testing and over 20,000 cycles of opening and closing.
  • 1 Year Limited Warranty on Manufacturer’s Defect in Material or Workmanship

Contact us now, to experience boat parts procurement services directly from the factory.

inboard/outboard thermostat

Thermostats for Mercury Yamaha Volvo Penta Yanmar OMC/Johnson/Evinrude Suzuki motors


Marine engine thermostats are a crucial component in a boat’s engine system, designed to regulate engine temperature with precision.

Utilizing a sensitive bimetallic coil and a precisely calibrated valve, the thermostats respond to rising coolant temperatures by expanding the coil to open the valve, allowing coolant flow. This mechanism ensures precise control to maintain the optimum operating temperature.

Marine Parts China’s thermostats are tested to meet OEM standards for optimal fit and function, ensuring reliable service life with a manufacturer warranty.

  • Extensive testing to meet strict OEM specifications for durability, reliability and precise fit, delivering OE-quality function.
  • 500 hours of salt spray testing and over 20,000 open-close cycles.
  • 1 Year Limited Warranty on Manufacturer’s Defect in Material or Workmanship
8M0139434 Thermostat with gasket for Mercury Mercruiser
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Marine thermostat Factory

Welcome to our world-class marine thermostat manufacturing facility. We specialize in the design and production of high-quality thermostats for both Japanese and American outboard engines, as well as inboard engines. Our comprehensive product range includes thermostats for YAMAHA, Suzuki, Honda, and TOHATSU engines from Japan, as well as Mercury and OMC/Johnson/Evinrude OMC engines from the United States. Additionally, our inboard engine thermostats cater to Yanmar and Volvo engines, further demonstrating our diverse capabilities.

Manufacturing Process

MPC’s modern production facility employs 50 dedicated workers, all skilled in their craft and committed to producing the best quality products. Our team’s expertise and dedication to precision have solidified our reputation in the industry.

What truly sets us apart is our commitment to quality. We have been audited by TUV Rheinland, a prestigious international certification body, and have been awarded the ISO9001:2008 and ISO/TS16949:2009 quality management system certificates. These certifications are testament to our adherence to the highest international standards of quality, underscoring our dedication to excellence.

Inside Our Thermostat Manufacturing Facility

We invite you to experience the difference our devotion to excellence makes, and discover why MPC is the proven choice for yourself.



Service & Support

From our skilled and dedicated production team to our responsive customer service, we strive to provide the highest level of service and support to our valued customers worldwide.

Sufficient Inventory

Accurate inventory management enables 7-10 days fast lead.


Support of private labeling and specialized packaging


Fast response for OEM & ODM, great partnerships with brand owners, distributors and manufacturers.

Quality Assurance

100% inspection throughout production and pre-shipment.

Get a Quick Quote

Let us know the product you like, your requirements, or anything we can help with. You will receive our response with a price quote and lead time estimate by the next business day.

Our Advantages

What makes us Us ?

As a leading aftermarket marine parts supplier, we differentiate ourselves by our dedication to service, quality, and value. Our experienced team strives to provide exceptional support and the highest-quality thermostats designed specifically for optimal performance and durability in marine engines. With extensive testing, customized options, and competitive pricing, we aim to exceed expectations.

Industry Experience
10+ years
warranty claim rate
Less than 1%
on-time delivery rate
Model Coverage
How do you ensure consistent quality?

We ensure consistent quality through extensive durability testing and precision manufacturing using high-grade materials. All our thermostats must satisfy OEM specifications.

What sets your thermostats apart from other brands?

Our thermostats undergo rigorous saltwater exposure testing and high cycle endurance testing beyond industry standards.

Can you provide customized packaging and labeling?

 Yes, we offer custom packaging and labeling to meet our customers’ branding needs.

How quickly can you fulfill orders?

We can fulfill standard orders within 7-10 business days. Rush orders can ship within 3-5 days.

What is your warranty policy?

We provide a 1-year limited warranty on defects in materials and workmanship.

How long have you been serving the marine industry?

We have been serving marine industry customers for over 10 years.

How can I contact your customer service team?

You can contact our customer service team by email at

Contact Us Today,
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