JPR-NL20IP Aftermarket Northern Lights M944 Seawater Pump 25-11202 | Sawley's Select Marine Parts

🔧 Product Description

Aftermarket JMP Northern Lights M944 seawater pump - Replacement Part Number: JPR-NL20IP

A bronze gear-driven seawater pump for Northern Lights M30, M38 and M944 generator engines. It replaces Northern Lights 25-11202 and uses the JMP 7400-01K flexible impeller.

⚙️ Key Features

• Heavy-duty marine bronze pump body

• Flexible-impeller positive-displacement design

• Marine-grade non-magnetic stainless-steel shaft

• Replaceable mechanical seal, bearings, cam and wear components

• Designed to match the listed OEM mounting, rotation and connection layout

🔄 Supersession & Cross Reference

OEM Supersession Chain:

• Northern Lights 25-11202 (OEM pump reference)

OEM / Related Numbers:

• JPR-NL20IP

• Northern Lights 25-11202

• Impeller: JMP 7400-01K

• Major service kit: JMP JSK0097

• Minor service kit: JMP JSM0078

Aftermarket / Verified Equivalents:

• JMP Marine: JPR-NL20IP

🚤 Compatibility

Commonly used on:

• Flexible-impeller raw-water cooling systems

Typically suits:

• Engine models:

• Northern Lights M30CW

• Northern Lights M38CR2

• Northern Lights M944T and M944W

• Northern Lights NL944D2 and NL944T

• HP Range: Generator-engine rating specific

• Engine Type: Northern Lights four-cylinder marine diesel generator engine

• Year Range: Model-specific; confirm OEM pump 25-11202

• Seawater Connections: 3/4 in pipe

• Dimensions: Approximately 170 × 120 × 97mm

• Weight: Approximately 2.5kg

• Impeller Reference: JMP 7400-01K

🔌 Function

The seawater pump draws raw water through the intake and circulates it through the engine, heat exchanger, oil cooler, aftercooler and wet-exhaust circuit as applicable. Its flexible impeller must maintain adequate flow from idle through full load while the shaft, bearings and mechanical seal keep the drive and water sections correctly supported and separated.

Common signs of failure:

• Engine temperature rises under load or at higher RPM

• Reduced or intermittent water discharge from the exhaust

• Missing, cracked, swollen or permanently set impeller vanes

• Seawater leakage or salt tracks from the shaft seal or weep area

• Bearing noise, pulley or gear wobble, or excessive shaft movement

• Scored cover plate, worn cam or damaged pump housing reduces suction

• Internal corrosion, air leakage or blocked inlet passages cause loss of prime

📦 Condition

• Brand new aftermarket replacement part

• New and unused

• Supplied in manufacturer or equivalent protective packaging