Description

The Sherwood 18000K Impeller Kit with Gasket is a complete raw water pump service kit designed to restore proper cooling system performance in marine engines equipped with Sherwood 18000 series pump assemblies. This kit includes a precision-molded neoprene impeller along with the required gasket and sealing components for a complete pump service.

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 and gasket together ensures proper sealing and consistent cooling performance, helping protect your engine from costly damage.

This kit is widely used across Sherwood pump-equipped marine engines, making it an essential maintenance item.

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Key Features

• Complete Sherwood impeller service kit with gasket
• Marine-grade neoprene rubber construction
• Flexible multi-blade impeller design
• Precision-molded for OEM fit and performance
• Includes pump cover gasket and sealing components
• Ensures proper sealing and cooling system efficiency

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Engine Compatibility

Sherwood Pump Compatibility (Primary Fitment)

Fits Sherwood 18000 series raw water pumps, including:

• G1801
• G1804
• G1805
• G1806
• G18061-01
• G1807
• G18071-01
• G1808
• G18081-01
• G1810 / G1810-01
• G1811-01
• G1814-01 / G1814X
• G1815-01
• G1816-01

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Engine Compatibility

Caterpillar Marine Engines

Commonly used on:

• CAT 3176
• CAT 3196
• CAT 3406
• CAT 3406C
• CAT 3406E
• CAT C12
• CAT C15
• CAT C18

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Cummins Marine Engines

• Cummins QSM11

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OEM Pump / Engine Cross-Reference Numbers

Caterpillar Part Numbers

• 030-1160
• 100-6441
• 1095324
• 1095327
• 112-6177
• 123-0471
• 123-0500
• 123-0492
• 1239785
• 131-8272
• 196-8895
• 197-1328
• 201-0956
• 2820683

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Cummins Cross Reference

• 3349392

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Pump Shaft / Fitment Specs (Important for Matching)

• Shaft Diameter: 15/16″ (23.8 mm)
• Hub Type: 14-tooth spline
• Blade Count: 12 blades
• Diameter: 3-3/4″ (95 mm)
• Width: 4″ (102 mm)

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Important Fitment Notes

• Fits only Sherwood 18000-series pumps
• Not interchangeable with:
  • 17000 series
  • 08000 / 10077 series
• Must match:
  • Spline count (14-tooth)
  • Shaft size (15/16″)

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Parts Desk Insight

The 18000K is a heavy-duty impeller used on large displacement diesel engines (CAT & Cummins)—if you’re working on a 3176/3406/QSM11 platform, this is one of the most common service kits you’ll see. The biggest mistake is confusing it with 17000K—they look similar but are completely different sizes

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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

If you’re replacing a Sherwood impeller, always replace the gasket at the same time. Reusing an old gasket is one of the most common causes of pump leaks after service