Sierra Marine Water Pump Kit | 18-3217
Free returns on all eligible orders
You have 30 days to request a return. All sale items are final sale.
Marine Water Pump Kit — Multi-Brand Replacement
This marine water pump kit is a direct replacement for a wide range of inboard and sterndrive engine cooling systems, including Mercruiser, Volvo, Indmar, Pleasurecraft, and Johnson Pump applications. It restores proper raw-water or coolant circulation to keep your engine running at safe operating temperatures.
Engineered to OEM fit and function, this kit includes the components needed for a complete pump service — making it a reliable choice for scheduled maintenance or emergency replacement on the water.
Key Specifications
- Part Number: 18-3217
- Application: Inboard and sterndrive marine engines
- Kit Type: Water pump service kit
Cross-Reference — Replaces OEM Part Numbers
- Mercruiser: 884727
- Mercury: 46-879194401 (V6 MCM, SN 1A063240 / 2007–Current)
- Volvo: 841640-6
- Indmar: 685001, 685011
- Pleasurecraft: RA057004, RA057019
- Johnson Pump: 10-24228-1
Related Sierra Parts
- Crankshaft-mounted pump kit: 18-3587-1 (with impeller kit 18-3089)
- Crankshaft-mounted pump kit: 18-3586-1 (with impeller kit 18-3081)
- Hose fitting pump (late model 4-cyl GM): 18-3593
- V6 MCM pump: 18-3506-1
Parts Desk Insights
Best Use Case: This kit is the go-to choice for a full water pump service on Mercruiser, Volvo, Indmar, or Pleasurecraft inboard and sterndrive engines — particularly during spring commissioning or after an overheating event. If you’re unsure whether you need the full pump kit or just an impeller, check whether your pump housing and wear plate show scoring or corrosion; if so, the full kit is the better value. Cross-reference your engine’s OEM part number above before ordering to confirm fitment.
Companion Parts: If your engine uses a crankshaft-mounted pump, pair with Sierra 18-3587-1 or 18-3586-1 depending on your application. Contact the Parts Desk if you need help identifying the correct configuration for your engine year and model.
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.