Mercury MerCruiser Quicksilver 3.7L Thermostat Housing Gasket 896561
In stock items ship same or next day.
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Product Description
Mercury Quicksilver 27-896561 is the thermostat-housing-to-exhaust-manifold gasket used in specified MerCruiser 3.7L four-cylinder cooling systems. It seals the thermostat housing at its manifold connection.
Key Features
- OEM number: 27-896561, also formatted 27-89656 1.
- Thermostat-housing gasket for MCM 3.7L applications.
- Replaces earlier gasket 27-89656.
Compatibility and Fitment
The 170 two-barrel Mercury 224 I/L4 cast-iron exhaust-manifold diagram identifies this gasket at position 13. Confirm the actual thermostat housing and cooling-system arrangement by engine serial number.
Replacement and Installation
Renew the gasket when removing the thermostat housing. Inspect the housing and manifold faces for corrosion and damage, and follow the correct tightening procedure.
Alternate / Superseded Part Numbers
27-896561 replaces 27-89656.
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Parts Desk Insight
This gasket seals the housing to the exhaust manifold. Do not confuse it with the exhaust-elbow gasket or thermostat seal elsewhere in the cooling assembly.
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.