Sierra 3160-1 Mercruiser Sea Water Pump - Brass
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You have 30 days to request a return. All sale items are final sale.
The Sierra 3160-1 Mercruiser Sea Water Pump in brass is a sea-water (raw-water) pump replacement designed for MerCruiser applications. It replaces MerCruiser 46-862914A13 and is built to use impeller 18-3016-1.
Key Features
- Brass sea water pump for MerCruiser cooling water flow
- Replaces: 46-862914A13
- Designed to use impeller: 18-3016-1
Product Compatibility
- MerCruiser sterndrive / inboard cooling systems that use a brass sea water (raw water) pump assembly and the referenced replacement number
- Boats requiring routine maintenance of the raw-water / sea-water pump and impeller in the engine cooling system
Product Details
- Replaces: 46-862914A13
- Sierra Sea Water Pump (Brass)
- Sierra impeller that this pump uses: 18-3016-1
- SKU: 47-31601
- Weight (variant): 2195 GRAMS
Parts Desk Insights
Best Use Case: Best for restoring proper raw-water/sea-water circulation when service inspection indicates the pump assembly or impeller needs replacement (commonly due to wear or reduced flow).
Common Issues: If flow is weak after service, re-check that the correct impeller (18-3016-1) is installed, confirm the mating surfaces are clean, and follow the cooling-water pump service procedure from the engine/leg service manual to avoid improper seating or cavitation.
Related Products & Accessories
- Impeller Service Kits - Browse the impeller service kit and related pump maintenance parts for your application.
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.