Jabsco 9970-200 Engine Cooling Pump for Perkins 4-107
The Jabsco 9970-200 is a flange-mounted, flexible impeller raw water pump built to keep diesel engines running at a safe operating temperature. Machined from solid bronze and paired with a stainless steel shaft, it draws in raw water and circulates it through the engine's cooling system, protecting internal components from heat damage during everyday running and heavy-duty use alike. Its 3/4 inch BSP threaded ports make plumbing straightforward, while the self-priming flexible impeller design means it starts moving water immediately without the need for manual priming.
This pump was originally engineered as factory equipment for the Perkins 4.107M and 4.108M engine range, and it remains a direct, drop-in replacement for owners maintaining these classic marine diesels today. Beyond Perkins applications, the same housing and mounting pattern were also used across a wider family of engines, including Hamworthy, Hawker Siddeley Marine, Lehman Power, and Valmet units, which is why this pump shows up so often in restoration and repower projects. Its bronze construction resists corrosion from saltwater and brackish environments, giving it a long service life when maintained properly.
Because the impeller is the wear component in any flexible impeller pump, owners typically keep a spare on hand and replace it as part of routine engine servicing rather than waiting for a failure at sea. Genuine Jabsco impellers and seals are recommended to preserve the pump's rated flow and pressure performance, and routine inspection of the wearplate, cam, and seals helps prevent premature impeller wear.
Key Features
- Self-priming flexible impeller design for immediate raw water flow
- Solid bronze pump body for corrosion resistance in marine environments
- Stainless steel drive shaft for durability under continuous use
- Flange-mounted configuration for direct engine installation
- Neoprene impeller construction suited to raw water cooling
- Mechanical shaft seal to reduce leakage and maintain pressure
Applications
- Perkins 4.107M and 4.108M marine diesel engines
- Hamworthy 2SF3, 3-4, and 3-6 engines
- Hawker Siddeley Marine FR1, FR2, FR3, FR4, FR6, HA, HW, HR, HRW2, and HRW4 engines
- Lehman Power Mercraft 150 Turbo engines
- Valmet Oy 310 DM and 411 DM engines
- Engine cooling, washdown, and general raw water circulation
Specifications
- Port size: 3/4 inch BSP threaded ports
- Pump body material: Bronze
- Shaft material: Stainless steel
- Impeller material: Neoprene
- Seal type: Mechanical shaft seal
- Mounting style: Flange mounted
- Pump size: 40 (size 040)
- Recommended spare impeller part number: 1210-0001-P
Frequently Asked Questions
Q: Can the Jabsco 9970-200 be rebuilt instead of replaced?
Yes, the pump is fully serviceable. Bearings, seals, the wearplate, gasket, and cam can all be replaced individually, which makes a full rebuild a practical option for keeping an existing pump in service.
Q: How often should the impeller be changed?
Most owners replace the impeller on an annual basis or after roughly 200 to 300 hours of running time, whichever comes first, since neoprene impellers lose flexibility over time and can fail without warning.
Q: Does this pump require priming before startup?
No, the flexible impeller design is self-priming, so it begins moving water as soon as the engine is running, provided the intake line is properly sealed and free of air leaks.
Q: Is this pump suitable for saltwater use?
Yes, the bronze body and stainless steel shaft are designed to withstand saltwater and brackish water environments, which is why this pump is a common choice for coastal and offshore vessels.
Q: What causes reduced water flow from this pump?
Reduced flow is most often caused by a worn or torn impeller, a clogged intake strainer, or a failing seal, so checking these components first is recommended before assuming a full pump replacement is needed.
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