JPR-G6400 Aftermarket Detroit Diesel Series 149 Seawater Pump | Sawley's Select Marine Parts

🔧 Product Description

Aftermarket replacement Series 149 Seawater Pump - Part Number: JPR-G6400

New aftermarket engine-cooling seawater pump for Detroit Diesel 8V149, 12V149 and 16V149 marine engines where the listed pump is specified. It replaces the listed OEM pump family and is supplied as a complete assembled pump. Dedicated Series 149 pump; Series 60 uses JPR-G6500.

⚙️ Key Features

• Direct aftermarket replacement for JPR-G6400

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

• Heavy-duty gear-driven pump

• Port configuration: Large Series 149 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-G6400

• 1 × Installed impeller - Large JMP flexible impeller for the 18780-series pump

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

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

• Mounting / installation: Confirm engine rotation and drive gear

🔄 Supersession & Cross Reference

OEM Supersession Chain:

• JPR-G6400 → Replaces / cross-references 23525078

• JPR-G6400 → Replaces / cross-references 8927296

OEM / Related Numbers:

• 23525078

• 8927296

Aftermarket / Verified Equivalents:

• Jabsco: 18780-0001

• JMP Marine: JPR-G6400

Service Parts / Kits:

• Major service kit: JMP JSK0027

• Minor service kit: JMP JSM0004

🚤 Compatibility

Commonly used on:

• JMP Marine / Detroit Diesel / Jabsco marine engine-cooling systems

Typically suits:

• Engine models:

• Detroit Diesel 8V149, 12V149 and 16V149 marine engines where the listed pump is specified

• 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 Series 149 flange ports; Heavy-duty gear-driven 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