Description

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.

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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

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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.

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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.

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Impeller Specifications

• Flexible multi-blade impeller
• Marine-grade neoprene construction
• Designed to Sherwood OEM specifications

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What’s Included in the Kit

• Impeller
• Pump cover gasket
• O-ring

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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

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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

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Alternate / Superseded Part Numbers

OEM Cross References

• Sherwood: 18000K

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Aftermarket Cross References

• JMP: 7700-01K (verify fitment)
• Sierra: 18-3088 (verify application)

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Shipping

Shipping: Ships same or next day for fast Canada wide shipping.

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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