JPR-NL10IP Aftermarket Northern Lights M753/M773/M843/M844 Seawater Pump 25-12057 | Sawley's Select Marine Parts

🔧 Product Description

Aftermarket JMP Northern Lights M753/M773/M843/M844 seawater pump - Replacement Part Number: JPR-NL10IP

A gear-driven bronze seawater pump for Northern Lights generator engines using OEM pump 25-12057 or Jabsco 30410-9001. It covers the M753, M773, M843 and M844 families plus the listed compact M16/M20 generator sets.

⚙️ 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 25-12057 (current OEM reference)

• Jabsco 30410-9001 (original pump cross-reference)

OEM / Related Numbers:

• JPR-NL10IP

• Northern Lights 25-12057

• Jabsco 30410-9001

• Impeller: JMP 7100-01K

• Major service kit: JMP JSK0073

Aftermarket / Verified Equivalents:

• JMP Marine: JPR-NL10IP

🚤 Compatibility

Commonly used on:

• Flexible-impeller raw-water cooling systems

Typically suits:

• Engine models:

• Northern Lights M16C, M20CL, M20CR, M20CR2 and M20CRW2

• Northern Lights M753K, M753W and M753W2

• Northern Lights NL753K, NL753W and NL753W2

• Northern Lights M773LW2 and M773LW3; NL773LW3

• Northern Lights M843JK, M843NK, M843NW2 and M843NW3

• Northern Lights NL843JK, NL843NK, NL843NW2 and NL843NW3

• Northern Lights M844K, M844LK, M844K2, M844LK2, M844LW2 and M844W2

• Northern Lights NL844K, NL844LK, NL844K2, NL844LK2, NL844LW2 and NL844W2

• Northern Lights M854-20N

• HP Range: Generator-engine rating specific

• Engine Type: Northern Lights marine diesel generator engine

• Year Range: Model-specific; confirm OEM pump 25-12057

• Original Pump Cross-Reference: Jabsco 30410-9001

• Impeller Reference: JMP 7100-01K

• Service Kit Reference: JMP JSK0073

🔌 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