Your Professional Honda Outboard Thermostat Supplier
Hangzhou Starwave Technology Co., Ltd. is a professional enterprise focusing on the full-range supply of outboard motor parts. Its core competitiveness comes from our own physical factory-a precision manufacturing base with decades of experience in manufacturing core components of internal combustion engines.We are highly compatible with nearly 100 models of global mainstream outboard motor brands such as Mercury, Yamaha, Suzuki and Honda, and our services cover diverse customer groups including professional repair shops, equipment distributors and overseas traders.
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19300-ZW9-003 Thermostat for Honda Marine BF 8-225HP Outb...
Horsepower: 8-225HP
Why Choose Us
R&D Team
The R&D center of Hangzhou Starwave Technology Co., Ltd. is built around a highly skilled technical team, featuring a structure characterized by senior leadership combined with deep professional specialization, ensuring strong technical expertise, efficient innovation, and the ability to develop high-quality products that meet international market standards.
Our Service
We provide dedicated one-on-one technical support, with our professional technical team available 24/7 and a guaranteed response time of within 2 hours, ensuring efficient communication, rapid problem resolution, and reliable support throughout the entire cooperation process.
Our Certificate
As a national high-tech enterprise, we hold IATF 16949 and ISO 9001 system certifications, along with multiple patents, demonstrating our strong commitment to quality management, technological innovation, and industry-leading standards.
Production Market
Our products are exported to a wide range of international markets, including South American countries such as Brazil and Argentina, Southeast Asian countries, African nations, Europe, and the United States, reflecting our strong global reach and the trust of customers worldwide.

A Reliable and Powerful Choice
Choosing the right outboard motor for your boat is crucial. Honda outboard motors stand out with their reliability and performance. They offer top-notch performance and save on fuel, making them a top choice.
Exceptional Performance
Honda outboard motors are known for their strong power and quick response. They give boaters the confidence and control they need. With advanced technology, these motors have a lot of horsepower and torque. This means your boat can handle rough waters, tow heavy things, or go fast easily.
Fuel Efficiency
Honda outboard motors are also known for saving fuel. Their design and engineering make them very fuel-efficient. This lets you enjoy boating more without spending a lot on gas. Plus, Honda cares about the environment, so you can have fun on the water without harming nature.
Product Parameters
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OEM |
19300-ZW9-003 |
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Specification: |
60C°/140F° |
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Replaces: |
Product Type: Ignition Key Switch / Specifications: / Replaces: / Oem Interchange Part Number : |
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For Honda 19300-ZW9-003, 19300-881-741, 19300-921-003, |
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For Yamaha 66M-12411, 6G8-12411, 677-12411, 656-12411, 648-12411, 689-12411, 6F5-12411, 6H7-12411, |
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For Mallory 9-43037 |
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For Sierra 18-3628, 18-3541 |
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Applications: |
This Item Fits Various Applications By Part Number. Please Check Your Part Number To Ensure Fitment. / Make & Model(S): |
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8 HP BF8D, BFP8D, 9.9 HP BF9.9D, BFP9.9D |
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15 HP BF15D, BFP15D, 20 HP BF20D, BFP20D |
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25 HP BF25D, 30 HP BF30D |
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40 HP BF40A, BF40D, 50 HP BF50A, BF50D |
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60 HP BF60A, BFP60A, 75 HP BF75D |
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90 HP BF90D, 200 HP BF200A |
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225 HP BF225A |
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Source: |
Aftermarket |
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Original: |
Lishui, China |
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Payment term: |
TT, LC |
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Delivery date: |
Negotiable |
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Packing: |
Export standard |
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Market: |
Asia/South America/Europe |
How To Install a Honda Outboard Thermostat
Preparation: First, shut down the outboard engine and ensure it is completely cooled to avoid burns. Prepare a compatible thermostat, gasket, and tools (such as wrenches and screwdrivers), and disconnect the power supply for safety.
Removing the Old Component: Locate the thermostat (usually located in the engine coolant passage), disconnect the connecting pipes and fixing screws, and carefully remove the old thermostat. Use a container to catch any residual coolant during this process to prevent leaks.
Cleaning and Inspection: Thoroughly clean the thermostat mounting bracket and surrounding area, removing dirt and impurities, ensuring a smooth surface. Check that the new thermostat model is compatible with the outboard engine and confirm the installation orientation markings.
Installing the New Thermostat: Place the new gasket, ensuring correct orientation; place the thermostat in its mounting position, ensuring a good seal. Apply a suitable amount of sealant (avoid excessive application), then tighten the screws to the specified torque in a crisscross pattern, and reconnect the pipes.
Inspection and Testing: Add coolant to the appropriate level, start the outboard motor and run it for a period of time, observing whether the water temperature gauge is normal, and simultaneously checking for leaks around the thermostat.
After installation: It is recommended to run the outboard motor and monitor the cooling system performance to ensure the thermostat is working properly. In case of complex situations, consulting a professional maintenance technician may be the safest course of action.
Maintain Of Honda Outboard Thermostat
Regular Replacement
Replace the thermostat annually or every 100 hours, as it's an inexpensive part that prevents major engine issues.
Visual Inspection
When replacing, check the thermostat housing for marine growth, corrosion, or debris.
Functional Test (Optional)
Place the old thermostat in a pot of hot (not necessarily boiling) water; it should open smoothly as the temperature rises and close when cooled.
Cleanliness
Clean any muck or buildup where the thermostat seats before installing the new one.
Gasket Replacement
Always use a new gasket or O-ring when installing a new thermostat to ensure a proper seal.
Flush the System
After replacement, flush the cooling system to remove trapped air and confirm good coolant flow.
Transportation

We are one of the most credible honda outboard thermostat manufacturers and suppliers in China, specialized in providing high quality customized service. We warmly welcome you to wholesale honda outboard thermostat for sale here from our factory. For quotation, contact us now.
9 9hp thermostat, honda outboard thermostat, 19300-ZW9-003