Mercury MerCruiser Quicksilver Cooling-Water Flush Plug 803592
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 19-803592 is the legacy cooling-water flush plug used in the driveshaft housing on specified Mercury and Mariner outboards. The plug closes the flushing access identified in the housing diagram.
Key Features
- Legacy OEM flush-plug reference: 19-803592.
- Driveshaft-housing cooling-water access location.
- Superseding Mercury reference: 19-879194296.
Engine Compatibility
Verified application includes Mercury 4HP FourStroke, serial numbers 0R000001–0R067089, in the driveshaft-housing diagram. The plug is also cataloged in specified Mercury 3.5HP FourStroke housing assemblies. Confirm the exact engine serial number and plug location.
Replacement and Installation
Inspect the plug threads, head and sealing face if the flushing connection leaks or the plug is damaged. Check the separate gasket identified in the engine diagram and follow the owner’s manual for flushing and plug installation.
Parts Desk Insight
The plug and its gasket are separate diagram entries. Match both references when servicing a leaking flushing port.
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.