Mercury MerCruiser Quicksilver Thermostat-Housing Gasket 8146801
In stock items ship same or next day.
Free returns on all eligible orders
You have 30 days to request a return. All sale items are final sale.
Product Description
Mercury MerCruiser Quicksilver 27-8146801 is the thermostat-housing gasket used on specified GM inline-four MerCruiser cooling systems. It seals the housing joint identified in the standard or closed-cooling diagram.
Key Features
- OEM thermostat-housing gasket, part 27-8146801.
- Supersedes 27-814680 and earlier 27-33680 in applicable diagrams.
- GTIN: 745061555105.
Engine Compatibility
Verified diagram applications include MerCruiser 3.0L GM 181 cu. in. inline-four standard and closed-cooling systems, 3.0LX exhaust-manifold / water-system arrangements and 3.0L MPI EC closed-cooling thermostat housings. Match the engine serial number and housing design.
Replacement and Installation
Replace a torn, compressed or leaking housing gasket. Allow the cooling system to cool and depressurize before service, then clean and inspect the mating surfaces. Follow the engine manual for gasket placement, sealant instructions and tightening.
Parts Desk Insight
The thermostat-housing gasket and upper thermostat-cover gasket can have different numbers in the same system. Confirm the exact joint before ordering.
Manufacturer Parts Lookup
Use Mercury’s official parts finder to check the part against your engine or drive serial number.
Shipping information
In-stock and OEM parts: ship same or next business day.
Locally warehoused items: ship within 1-3 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.