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Welcome Offer : Use Code WELCOME5 for 5% OFF!
Free Shipping on Most USA Orders
Welcome Offer : Use Code WELCOME5 for 5% OFF!
Free Shipping on Most USA Orders
Welcome Offer : Use Code WELCOME5 for 5% OFF!
Free Shipping on Most USA Orders
Welcome Offer : Use Code WELCOME5 for 5% OFF!
Free Shipping on Most USA Orders
Welcome Offer : Use Code WELCOME5 for 5% OFF!
Free Shipping on Most USA Orders
Welcome Offer : Use Code WELCOME5 for 5% OFF!
Free Shipping on Most USA Orders
Welcome Offer : Use Code WELCOME5 for 5% OFF!
Free Shipping on Most USA Orders
Welcome Offer : Use Code WELCOME5 for 5% OFF!
Free Shipping on Most USA Orders
Welcome Offer : Use Code WELCOME5 for 5% OFF!
Free Shipping on Most USA Orders
⚠️ California Proposition 65 Warning : Some products sold on this website may expose you to chemicals known to the State of California to cause cancer, birth defects, or other reproductive harm.
For more information, visit www.P65Warnings.ca.gov.
Sierra'S 18-3642 Thermostat Kit Is Designed For Use With Mercury/Mariner 40 Hp (3 Cylinder) (S/N 1C049739 & Up) Outboard Engines. Includes (1) Thermostat And (1) Gasket Per Package. It Is Interchangeable With Mercury Marine 855676A1. Each Sierra Product Meets Or Exceeds The Original Equipment Part It Replaces. Fit Specific, Check Part Numbers To Ensure Proper Fit.
Yes, we offer free standard shipping on all orders within the United States.
When will I receive my item?
Domestic orders typically arrive within 3-5 business days. Delivery times are estimated and may vary depending on your location, weather conditions, or other unforeseen factors.
Can I change or return my item?
We hope you love your purchase, but if you need to make a change or return your item, we’ve got you covered! You can initiate a return or exchange within 30 days of receiving your order. Please ensure the product is in its original condition and packaging. For more information on our return policy, please visit our Returns & Exchanges page.
Frequently Asked Questions
Q: What is the part number for this thermostat kit?A: The part number is eighteen three six four two. This model is essential for the specified outboard engines.
Q: What engines is this thermostat kit compatible with?A: This kit is designed for Mercury and Mariner forty horsepower three cylinder outboard engines. Specifically, it fits serial numbers one C zero four nine seven three nine and up.
Q: What does this thermostat kit include?A: The kit includes one thermostat and one gasket per package. These components are crucial for proper engine temperature regulation.
Q: How big is the thermostat and gasket in this kit?A: Each item in the kit has dimensions of zero point three nine inches in length, width, and height. This compact size ensures easy installation.
Q: Is this thermostat interchangeable with other parts?A: Yes, it is interchangeable with Mercury Marine eight five five six seven six A one. This feature enhances its usability for various engine repairs.
Q: How do I install this thermostat kit?A: To install, first ensure the engine is cool and disconnect the battery. Then, remove the old thermostat and gasket, clean the surface, and install the new parts according to your engine's manual.
Q: Can this kit be used for engines not listed?A: No, it is specifically designed for certain Mercury and Mariner engines. Always check the part numbers for compatibility before purchase.
Q: Is this thermostat suitable for marine environments?A: Yes, it is designed for marine use and meets or exceeds the quality of the original equipment. This ensures reliability in harsh conditions.
Q: What are the recommended care instructions for this thermostat?A: Keep the thermostat and gasket protected from extreme temperatures and moisture. Regularly check for wear and replace as necessary to maintain engine performance.
Q: How long will this thermostat last?A: The lifespan varies based on usage and maintenance, but typically this thermostat will last several seasons if properly cared for. Regular checks can help ensure longevity.
Q: What do I do if the thermostat arrives damaged?A: If the thermostat arrives damaged, contact the seller immediately for a return or exchange. Most sellers offer a warranty or satisfaction guarantee.
Q: Is there a warranty for this thermostat kit?A: Yes, Sierra products usually come with a warranty. Check the packaging or the manufacturer’s website for specific warranty details.
Q: Can I install this thermostat myself?A: Yes, if you have basic mechanical skills and tools, you can install this thermostat yourself. Follow the installation instructions carefully.
Q: What happens if I use this thermostat in the wrong engine?A: Using the wrong thermostat can lead to overheating or inadequate cooling. Always verify compatibility to avoid damage to your engine.
Q: Does this thermostat kit include installation instructions?A: No, installation instructions are not included. It is advisable to consult your engine's service manual for guidance on installation.
Q: Where is this thermostat kit manufactured?A: This thermostat kit is manufactured by Sierra, a company known for producing high-quality marine parts. Their products meet strict quality standards.