GHmarine 18-3647 Thermostat Repair Kit for Mercruiser Sterndrive 4.3L-8.2L
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Description
xRestore reliable cooling with GHmarine 18-3647 Thermostat Repair Kit
When a Mercruiser stern drive temperature shows fluctuations or begins to overheat, the GHmarine 18-3647 Thermostat Repair Service Kit offers a practical, ready to install solution. Designed for Mercruiser Sterndrive engines, this kit brings together essential components in one package, making it easier to refresh the heart of the cooling system without hunting for parts separately. The result is a maintenance option that can help you keep the engine running smoothly on the water.
What’s included
- 1x thermostat with a 160°F rating
- 1x o-ring for a secure, leak-free seal
- 1x housing sleeve for a stable mounting base
- 4x thermostat gaskets for dependable heat exchange
Compatibility and replacements
- Fits Mercruiser 4.3L through 8.2L Sterndrive models
- Replaces multiple part numbers including 807252Q5, 807252T8, 8M0091470, 8M0109441 and more
The kit is designed to cover a broad range of Mercruiser configurations, offering a unified set of parts that can simplify repairs. The included thermostat and seals are chosen to support reliable heat management, while the housing sleeve helps create a solid mounting base for the thermostat assembly. This can be especially helpful when you are working on older boats or mixed-model installations where compatibility matters.
Practical uses and benefits
- Potential for steadier temperatures during extended runs and duty cycles
- DIY-friendly assembly that can minimize downtime when performing routine maintenance
- Marine-grade components designed to stand up to saltwater and freshwater use
Note that outcomes depend on the overall condition of the cooling system and correct installation. This kit is a targeted upgrade that provides commonly needed parts; it does not guarantee specific performance. Always follow the boat manufacturer guidelines and verify the system after completing the repair.
Care and use
After installation, inspect all seals for snug fit and check for leaks after a test run. Regular inspection of the thermostat, gaskets, and o rings can help maintain reliable cooling and extend the life of the stern drive cooling system.
FAQ
Q: What is included in the GHmarine 18-3647 Thermostat Repair Kit?
A: The kit includes a thermostat, an o-ring, a housing sleeve, and four gaskets for Mercruiser stern drives.
Q: Which Mercruiser models and part numbers does it fit or replace?
A: Fits 4.3L to 8.2L sterndrive models and replaces several part numbers including 807252Q5, 807252T8, 8M0091470, and 8M0109441.
Shipping & Return
xReturns Policy
You may return most new, unopened items within 30 days of delivery for a full refund. We'll also pay the return shipping costs if the return is a result of our error (you received an incorrect or defective item, etc.).
You should expect to receive your refund within four weeks of giving your package to the return shipper, however, in many cases you will receive a refund more quickly. This time period includes the transit time for us to receive your return from the shipper (5 to 10 business days), the time it takes us to process your return once we receive it (3 to 5 business days), and the time it takes your bank to process our refund request (5 to 10 business days).
If you need to return an item, simply login to your account, view the order using the "Complete Orders" link under the My Account menu and click the Return Item(s) button. We'll notify you via e-mail of your refund once we've received and processed the returned item.
Shipping
We can ship to virtually any address in the world. Note that there are restrictions on some products, and some products cannot be shipped to international destinations.
When you place an order, we will estimate shipping and delivery dates for you based on the availability of your items and the shipping options you choose. Depending on the shipping provider you choose, shipping date estimates may appear on the shipping quotes page.
Please also note that the shipping rates for many items we sell are weight-based. The weight of any such item can be found on its detail page. To reflect the policies of the shipping companies we use, all weights will be rounded up to the next full pound.
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