Sherwood or Cummins Engine Cooling Pump JPR-C0830 — Direct-Fit Raw Water Pump
The Sherwood & Cummins Engine Cooling Pump JPR-C0830 is a complete, ready-to-bolt-on cooling pump built for Cummins 8.3-liter and 9.0-liter engine platforms, including the QSC8.3 and QSL9.0. It arrives assembled and ready to mount, so there is no rebuilding, no transferring of old hardware, and no guesswork about whether the drive engages correctly. The splined drive shaft and flanged port arrangement match the original Sherwood layout, which means the pump drops into the same footprint the factory unit occupied and connects to the existing hose runs without adapters or modified brackets.
Inside, the pump uses a heavy-duty cast bronze body paired with a flexible neoprene impeller and a non-magnetic 3X-series marine-grade shaft. That combination is what allows the pump to self-prime, pull water from a lift of roughly fifteen feet once primed, and move high volume at both idle and cruise speed without cavitating. The O-ring end cover seals cleanly and comes apart with hand tools, so an impeller inspection is a fifteen-minute job rather than an afternoon. When service time does come around, the JSM0137 minor kit and JSK0137 major kit cover the wear parts, and the impeller is available on its own as 8159-01.
While these engines are widely known in boats, the same 8.3 and 9.0 blocks show up in generator sets, pump packages, mobile and stationary industrial equipment, and other cooled installations that draw from an external water supply. The JPR-C0830 serves all of them equally well. It cross-references directly to Cummins 3967246, 4937162, 4937275, and 5445566, and to Sherwood G2610, G2610X, G2603, G2603X, G2601, G2601X, and G2601-02, making it a straightforward substitution whether the machine sits in a hull, a skid, or an equipment room.
Key Features
- 100% plug-and-play replacement — no modification, adapters, or re-bracketing required
- Heavy-duty cast bronze pump body for corrosion resistance in raw and sea water service
- Flexible neoprene impeller delivers high-volume flow at both low and high engine speeds
- 3X-series non-magnetic marine-grade stainless shaft
- Splined drive shaft matching the original Cummins/Sherwood drive engagement
- O-ring end cover packing for a clean, reusable seal and fast impeller access
- Self-priming with up to approximately 15 ft suction lift once primed
- Runs with equal efficiency in either rotation direction
- Can be mounted at any angle to suit the installation
- Serviceable with readily available minor and major rebuild kits
Applications
- Cummins QSC8.3 engines
- Cummins QSL9.0 engines
- Cummins 8.3L and 9.0L industrial and off-highway power units
- Generator set cooling systems using Cummins 8.3L / 9.0L blocks
- Stationary and skid-mounted equipment packages requiring raw water engine cooling
- Marine propulsion and auxiliary engine cooling circuits
- Replacement service for Sherwood G2610X, G2603X, and G2601X installations
Specifications
- Part Number: JPR-C0830
- Pump Type: Flexible impeller, self-priming engine cooling / raw water pump
- Port Size: 2 in. flanged inlet and 2 in. flanged discharge
- Drive Type: Spline drive
- Pump Body Material: Bronze
- Impeller Material: Neoprene
- Impeller Part Number: 8159-01 (kit: 8159-01K)
- Shaft: 3X-series non-magnetic marine-grade
- End Cover Seal: O-ring packing
- Rotation: Bi-directional
- Mounting: Flange mount, any angle
- Maximum Suction Lift: Approx. 15 ft when primed
- Pump Weight: 25.0 lbs (11.40 kg)
- Minor Service Kit: JSM0137
- Major Service Kit: JSK0137
- Replaces Cummins: 3967246, 4937162, 4937275, 5445566
- Replaces Sherwood: G2610, G2610X, G2603, G2603X, G2601, G2601X, G2601-02
Frequently Asked Questions
Q: Do I need to prime the pump before the first start after installation?
A: A dry impeller will usually pick up prime on its own once the seacock or supply valve is open and the engine turns over, but coating the impeller with a light film of glycerin or dish soap before assembly protects it during those first few dry revolutions and helps it grab water faster.
Q: Will this pump work if my engine turns the opposite direction from a standard installation?
A: Yes. The flexible impeller design moves water with equal efficiency in either rotation, so the same pump serves both standard and reverse-rotation engines without any internal changes.
Q: How often should the impeller be inspected?
A: Most operators pull the end cover once per season or every 500 operating hours, whichever comes first. Look for flattened vanes, cracks at the vane roots, or missing tips — a missing tip means fragments are downstream and should be recovered before restarting.
Q: Can I reuse my existing end cover gasket when I service it?
A: The pump uses an O-ring rather than a paper gasket, and while an O-ring in good condition can often be reused once, replacing it is inexpensive and eliminates the most common source of post-service weeping.
Q: What causes a new pump to run hot or lose flow shortly after installation?
A: Nearly always a restriction upstream rather than the pump itself — a partially closed valve, a collapsed suction hose, a fouled strainer, or debris in the intake. Verify a clear, unrestricted supply path before suspecting the pump.
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