Sherwood Impeller Kit 18000K – Raw Water Pump Service Kit
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The Sherwood 18000K Impeller Kit is a complete raw water pump service kit designed to restore proper cooling system performance in marine engines equipped with Sherwood 18000 series pumps. This kit includes a precision-molded neoprene impeller along with sealing components to ensure reliable water flow and long service life.
The impeller is responsible for circulating seawater through the engine cooling system. Over time, the flexible vanes can wear, harden, or crack, reducing efficiency and increasing the risk of overheating. Replacing the impeller at recommended intervals ensures consistent cooling performance and helps protect your engine from damage.
This kit is widely used across Sherwood pump-equipped marine engines, making it a key maintenance item for dependable operation.
Key Features
- Complete Sherwood impeller service kit
- Marine-grade neoprene rubber construction
- Flexible multi-blade impeller design
- Precision-molded for OEM fit and performance
- Includes gasket and O-ring for full reseal
- Maintains proper raw water flow and cooling performance
Engine Compatibility
Sherwood Pump Applications
Fits Sherwood 18000 series pumps, including:
- P1801
- P1802
- P1803
- P1804
- P1805
➡️ Commonly used on a variety of marine engines equipped with Sherwood raw water pumps.
Serial Number Fitment Notice
Fitment depends on:
- Pump model (18000 series required)
- Shaft size and hub configuration
- Engine application
⚠️ Always confirm compatibility using your pump model or engine serial number before ordering.
Impeller Specifications
- Flexible multi-blade impeller
- Marine-grade neoprene construction
- Designed to Sherwood OEM specifications
What’s Included in the Kit
- Impeller
- Pump cover gasket
- O-ring
When This Part Needs Replacement
Replace the impeller if you notice:
- Reduced or no cooling water flow
- Engine overheating
- Cracked, missing, or stiff vanes
- Reduced performance under load
Recommended service interval: every 100 hours or annually
Installation Notes
- Lubricate impeller before installation
- Install with correct vane direction
- Replace all gaskets and O-rings
- Inspect pump housing and wear surfaces
- Check system for broken vane debris
Alternate / Superseded Part Numbers
OEM Cross References
- Sherwood: 18000K
Aftermarket Cross References
- JMP: 7700-01K (verify fitment)
- Sierra: 18-3088 (verify application)
Shipping
Shipping: Ships same or next day for fast Canada wide shipping. ⚓
💡 Parts Desk Insight
Sherwood 18000-series impellers are often confused with 17000 and 27000 series—they may look similar but are not interchangeable. Always confirm the pump model before ordering 👍
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.