JPR-CT1800R Aftermarket Caterpillar C18 Seawater Pump Sherwood G2902X | Sawley's Select Marine Parts

🔧 Product Description

Aftermarket replacement C18 Seawater Pump - Part Number: JPR-CT1800R

New aftermarket engine-cooling seawater pump for Caterpillar C18 marine engines using the Sherwood G2902X pump, C18 arrangements using Caterpillar 3754703. It replaces the listed OEM pump family and is supplied as a complete assembled pump. Sherwood G2906X uses a 36-tooth gear; reuse the original G2906X gear if adapting this pump.

⚙️ Key Features

• Direct aftermarket replacement for JPR-CT1800R

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

• 40-tooth gear supplied for the G2902X application

• Port configuration: Large 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-CT1800R

• 1 × Installed impeller - JMP 8359-01K / Caterpillar 2968388 / Sherwood 29000K family

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

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

• Mounting / installation: Mounting seal supplied with specified packages

🔄 Supersession & Cross Reference

OEM Supersession Chain:

• JPR-CT1800R → Replaces / cross-references 3754703

• JPR-CT1800R → Replaces / cross-references 375-4703

• JPR-CT1800R → Replaces / cross-references 1318272

• JPR-CT1800R → Replaces / cross-references 1968895

OEM / Related Numbers:

• 3754703

• 375-4703

• 1318272

• 1968895

Aftermarket / Verified Equivalents:

• Sherwood: G2902X

• JMP Marine: JPR-CT1800R

Service Parts / Kits:

• Major service kit: JMP JSK0139

🚤 Compatibility

Commonly used on:

• JMP Marine / Caterpillar marine engine-cooling systems

Typically suits:

• Engine models:

• Caterpillar C18 marine engines using the Sherwood G2902X pump

• C18 arrangements using Caterpillar 3754703

• 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 flange-port pump; 40-tooth gear supplied for the G2902X application. 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