JPR-C1100 Aftermarket Cummins QSM11 Seawater Pump Sherwood G2903X | Sawley's Select Marine Parts

🔧 Product Description

Aftermarket replacement QSM11 Seawater Pump - Part Number: JPR-C1100

New aftermarket engine-cooling seawater pump for Cummins QSM11 marine engines. It replaces the listed OEM pump family and is supplied as a complete assembled pump. This is the larger QSM11 pump; confirm against smaller Sherwood-pattern alternatives.

⚙️ Key Features

• Direct aftermarket replacement for JPR-C1100

• Heavy-duty marine-grade bronze or corrosion-resistant pump construction

• Engine-driven large-volume pump

• Port configuration: 2-inch flange ports

• Serviceable flexible-impeller design with replaceable cover, cam, seal, shaft and bearings

🧰 Kit / Assembly Contents

• 1 × Complete seawater pump assembly - Part Number: JPR-C1100

• 1 × Installed impeller - JMP 8359-01K / Cummins 4933742 / Sherwood 29000K

• 1 × Installed shaft, bearing, cam and mechanical-seal assembly

• 1 × Installed end cover with gasket or O-ring sealing system

• Mounting / installation: Complete pump is internally compatible with the genuine 29000-series family

🔄 Supersession & Cross Reference

OEM Supersession Chain:

• JPR-C1100 → Replaces / cross-references 3349392

• JPR-C1100 → Replaces / cross-references 4929178

• JPR-C1100 → Replaces / cross-references 5260393

OEM / Related Numbers:

• 3349392

• 4929178

• 5260393

Aftermarket / Verified Equivalents:

• Sherwood: G2903X

• Sherwood: G2903-01

• Sherwood: G2903-02

• JMP Marine: JPR-C1100

Service Parts / Kits:

• Major service kit: JMP JSK0080

🚤 Compatibility

Commonly used on:

• JMP Marine / Cummins marine engine-cooling systems

Typically suits:

• Engine models:

• Cummins QSM11 marine engines

• HP / Output Range: Engine- or generator-rating dependent

• Engine Type: Marine diesel, petrol or generator engine as listed above

• Year Range: Engine-model, arrangement and serial-number dependent

• Port / Drive Identification: 2-inch flange ports; Engine-driven large-volume pump. Confirm rotation, shaft/gear style, flange, port direction and mounting seal before ordering.

🔌 Function

The engine-driven flexible-impeller seawater pump draws raw water through the vessel's intake and strainer, then circulates it through the heat exchanger, charge-air cooler, exhaust mixer and other seawater-cooled components. Adequate flow is essential for controlling engine and exhaust temperatures.

Common signs of failure:

• Engine or exhaust temperature rises above normal

• Weak or absent seawater discharge at the exhaust outlet

• Impeller blades are cracked, missing, swollen or permanently set

• Water leaks from the pump cover, shaft seal, drain hole or mounting flange

• Bearing noise, shaft play or a seized pump drive

📦 Condition

• New aftermarket replacement seawater pump

• Brand new

• Supplied in original or equivalent packaging