JPR-C1905 Aftermarket Cummins KTA19/QSK19 Seawater Pump 3866609 | Sawley's Select Marine Parts

🔧 Product Description

Aftermarket replacement KTA19/QSK19 Seawater Pump - Part Number: JPR-C1905

New aftermarket engine-cooling seawater pump for Cummins KTA19 marine engines using pump 3866609, Cummins QSK19 marine engines using pump 3866609. It replaces the listed OEM pump family and is supplied as a complete assembled pump. For the Gilkes-style 3049158/3074540 pump use JPR-C1900.

⚙️ Key Features

• Direct aftermarket replacement for JPR-C1905

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

• Gear-driven flexible-impeller pump

• Port configuration: Large engine flange-port pump

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

🧰 Kit / Assembly Contents

• 1 × Complete seawater pump assembly - Part Number: JPR-C1905

• 1 × Installed impeller - JMP 9001-01K

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

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

• Mounting / installation: Mounting O-ring supplied with the pump

🔄 Supersession & Cross Reference

OEM Supersession Chain:

• JPR-C1905 → Replaces / cross-references 3866609

OEM / Related Numbers:

• 3866609

Aftermarket / Verified Equivalents:

• Jabsco: 18770-0003

• JMP Marine: JPR-C1905

Service Parts / Kits:

• JMP major service kit for the JPR-C1905 family

🚤 Compatibility

Commonly used on:

• JMP Marine / Cummins marine engine-cooling systems

Typically suits:

• Engine models:

• Cummins KTA19 marine engines using pump 3866609

• Cummins QSK19 marine engines using pump 3866609

• 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: Large engine flange-port pump; Gear-driven flexible-impeller 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