Mercury MerCruiser Quicksilver Thermostat Gasket 62386001
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Mercury MerCruiser Quicksilver 27-62386001 is a thermostat gasket used to seal the thermostat housing area on select Mercury / Mariner outboard and jet-drive cooling-system assemblies. Current Mercury parts references show 27-62386001 superseding to 27-8M0204714, with the newer part listed as the functional replacement under the same GTIN 745061164895.
Key Features
- Genuine Mercury / Quicksilver thermostat gasket reference
- Used at the thermostat housing sealing surface
- Helps prevent cooling-water leakage around the thermostat assembly
- Original Mercury reference: 27-62386001 / 62386001
- Current replacement reference: 27-8M0204714 / 8M0204714
- UPC / GTIN reference: 745061164895
- Sold individually in common parts references
Engine Compatibility
This thermostat gasket is shown in Mercury parts references across select Mercury / Mariner outboard and jet-drive applications, including various 55, 60, 65 Jet, 75, 80 Jet, 90 DFI, 115, 115 DFI, 125, V-135, V-150, V-175, V-200, 2.5L EFI / DFI, 200 DFI Jet Drive, 200XS, Pro XS, Magnum III, XR-6, and related model families depending on serial number range.
Serial Number Fitment Notice
Thermostat gasket fitment depends on the exact engine model, thermostat housing, cooling-system layout, and serial number range. Always confirm compatibility using the Mercury or MerCruiser serial number before ordering, especially where older 27-62386001 has been replaced by 27-8M0204714.
When This Part Needs Replacement
Replace this gasket whenever the thermostat housing is removed, during thermostat service, or when there are signs of seepage, gasket compression, tearing, swelling, hardening, or cooling-water leakage around the thermostat cover.
Installation Notes
Clean both thermostat housing mating surfaces before installation and remove old gasket material carefully without scratching the housing. Inspect the thermostat, fasteners, cover, and surrounding cooling passages while the housing is apart. Install the gasket in the correct orientation and follow the Mercury service manual procedure for the specific engine.
Alternate / Superseded Part Numbers
- 27-62386001
- 62386001
- 27-62386
- 62386
- 27-62386B
- 62386B
- 27-8M0204714
- 8M0204714
- Sierra 18-0182
- GLM 30610
- Mallory 9-60002
- OMC / Johnson / Evinrude 0310058 / 310058
Parts Desk Insight
This gasket is best matched by the thermostat housing diagram and engine serial number, not by horsepower alone. The supersession to 8M0204714 is important because the replacement is the current Mercury reference and may appear under the newer number in ordering systems.
Shipping: Ships same or next day for fast Canada wide shipping. ⚓
Shipping information
In-stock and OEM parts: ship same or next business day.
Locally warehoused items: ship within 3–4 business days.
Special-order items: timeline confirmed after order.
Returns & warranty
Returns & Satisfaction Guarantee
We stand firmly behind the quality of every product we sell. Your confidence matters to us — and we back it with a straightforward 30-Day Satisfaction Guarantee.
If you are not fully satisfied, you may request a return within 30 days of delivery. All returns must receive pre-approval prior to being sent back. Unauthorized returns will not be accepted.
To qualify for a return:
Item must be in new, unused condition
Product must be in its original packaging
All parts, components, hardware, manuals, and accessories must be included
Packaging must be undamaged and suitable for resale
Important:
Electronics are strictly inspected. No returns on open-box electronics. Exceptions may apply only with prior written approval. Any electronic unit that has been installed, powered, activated, or altered may not be eligible for return.
We are serious about product integrity — and equally serious about taking care of our customers. If there is ever a product issue, contact us immediately so we can make it right.
For return authorization, please contact our support team before shipping anything back.