Mercury MerCruiser Quicksilver 3-Inch Heat-Exchanger End-Cap Gasket 75450
In stock items ship same or next day.
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You have 30 days to request a return. All sale items are final sale.
Product Description
Mercury MerCruiser Quicksilver 27-75450 is the end-cap gasket for the 3-inch heat exchanger used on specified MerCruiser 3.7L / 224 cu. in. engines. It seals between the heat-exchanger body and removable end cap.
Key Features
- OEM heat-exchanger end-cap gasket.
- Full catalog reference: 27-75450; bare part number: 75450.
- Application: specified MerCruiser 3.7L engines with the 3-inch heat exchanger.
- The applicable heat-exchanger diagram shows an end-cap gasket at each end.
Product Compatibility
Match the installed heat exchanger, especially on engines that have been upgraded or repowered. The 3-inch exchanger uses this gasket; the 4-inch exchanger is cataloged with a different end-cap gasket.
Replacement and Installation
Replace a damaged or leaking gasket when servicing the heat-exchanger end cap. Inspect the end plate, retaining washer and screw, and clean the gasket seating surfaces without damaging them. Work only on a cool, depressurized cooling system and follow the engine service instructions.
Parts Desk Insight
Heat-exchanger diameter matters more than the 3.7L engine badge alone. Confirm the exchanger and end-cap arrangement 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.