EMP Water Pump Kit with Housing – Mercury/Mariner Outboard | EMP-46-03638
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You have 30 days to request a return. All sale items are final sale.
EMP Water Pump Kit with Housing – Mercury/Mariner Outboard
Keep your outboard running cool with a complete water pump rebuild. This kit includes the impeller housing along with all the components needed for a full water pump service — impeller, wear plate, and seals — so you have everything in one box and aren’t hunting down individual parts mid-job.
The raw water cooling system on an outboard is one of the highest-wear service items on the engine. A degraded impeller can’t move enough water to keep cylinder temps in check, leading to overheating damage that costs far more to fix than a routine pump replacement. Replacing the full kit on a regular service interval is the most reliable way to protect your engine investment.
Best Use Case
Best suited for scheduled water pump service on Mercury and Mariner outboard engines. Recommended at every 100 hours or annually — whichever comes first — or any time you notice reduced water flow from the tell-tale, overheating warnings, or after running in sandy or silty water that accelerates impeller wear. Also the right kit when replacing a housing that has cracked or corroded beyond reuse.
- Includes: Impeller, housing, wear plate, and seals
- Application: Mercury / Mariner outboard engines
- Part number: EMP-46-03638
- Cross-reference: Mercury 46-03638 series
- Service interval: Every 100 hours or annually
Parts Desk Insights
Always confirm fitment against your engine’s model and serial number before ordering — Mercury outboard water pump kits vary by horsepower range and model year, and using the wrong kit is the most common installation error. When installing, never run the impeller dry even briefly; lubricate with dish soap or a water-based lubricant before assembly. Inspect the driveshaft splines and housing mating surfaces for corrosion while the pump is apart — it’s the right time to catch issues that would otherwise require a second disassembly. If you’re unsure of your engine’s exact part number, bring the model and serial number to the parts desk for a fitment check.
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.