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Sherwood Marine Engine Cooling Pump GC1
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Sherwood GC1 Flange Mounted Engine Cooling Pump (1-1/2" Ports)

Part No. SWGC1

£1,026.68 You pay £1,026.68 Incl VAT You pay £855.57 Excl VAT

RRP £1,140.76 £950.63

Save £114.08 (10.0%) Save £95.06 (10.0%)


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Brand Sherwood
Model GC1
Inlet / Outlet To suit 38mm (1-1/2") hose
Drive Type Gear Driven
Replacement Impeller SW15000K
Repair Kit SW23981 Major Kit, SW23980 Minor Kit
Replaces Sherwood Pump Model GC1-01, Cummins Pump 3912962
Applications Cummins B series and Cummins 6B engines up to 250HP
Mounting Flange Mount

The raw water engine cooling pump is the heart of the marine engine, supplying a continuous flow of raw water to maintain temperatures consistent with the demanding engine performance. Over the years, Sherwood raw water pumps have developed a reputation of excellence in quality; and today are chosen for their performance and dependability by the most prestigious marine engine manufacturers.

Sherwood pumps are one of the largest suppliers of flexible rubber impeller cooling pumps for marine engines in the USA. Sherwood pumps can be found fitted on some of the most well known engine brands in both pleasure and commercial boats.

This is a genuine Sherwood GC1 flange mounted boat engine cooling pump, using raw water intake (river water or sea water) to cool the engine. The Sherwood GC1 is supplied complete with a 12 vane through key drive flexible neoprene impeller.

To ensure that your boat engine cooling pump performs as required, regular preventative maintenance and inspection should be carried out. The Sherwood engine cooling pump impeller should be replaced every 3 - 12 months depending on application.

The number one reason for premature engine wear is overheating. To maintain engine performance, insist upon genuine Sherwood impeller pumps, impellers and service kits.

The Sherwood GC1 flexible impeller engine cooling pump replaces the Sherwood pump models GC1-01.

Typical applications for the Sherwood GC1 pump include: Cummins B series and Cummins 6B engines up to 250HP. Replaces Cummins pump 3912962.

GC1 Spare Parts:

Key Spare Parts Part Number Quantity
1 Screw 12857 3
2 Lock Washer 12710 3
3 Body 14160 1
4 Housing 17684 1
5 Impeller 15000 1
6 O-Ring 12231 1
7 End Plate 12856 1
8 Gasket 12855 1
9 Key 4432 1
10 Shaft 21069 1
11 Retaining Ring 4258 2/3
12 Washer 4264 1
13 / 14 Mechanical Seal 12859 1
15 Retaining Ring 14161 1
16 Retaining Ring 4259 2
19 Ball Bearing 23448 2
20 Spacer 5133 1
21 Cam Plate 18398 1
22 Cam Screw 10515 1
23 Drive Pulley 14184 1

SWGC1 Diagram

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