JPR-YM06LY3 Aftermarket Yanmar 6LY3-ETP/STP/UTPP Seawater Pump 119578-42501 | Sawley's Select Marine Parts

🔧 Product Description

Aftermarket JMP Yanmar 6LY3 seawater pump - Replacement Part Number: JPR-YM06LY3

A heavy-duty bronze seawater pump for Yanmar 6LY3 electronic marine diesel engines. It replaces Yanmar 119578-42501 and cross-references to Johnson 10-13286-01.

⚙️ 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:

• Yanmar 119578-42501 (OEM pump reference)

• Johnson 10-13286-01 (original pump cross-reference)

OEM / Related Numbers:

• JPR-YM06LY3

• Yanmar 119578-42501

• Johnson 10-13286-01

• Impeller: JMP 7376-01K

• Major service kit: JMP JSK0127

• Minor service kit: JMP JSM0127

Aftermarket / Verified Equivalents:

• JMP Marine: JPR-YM06LY3

🚤 Compatibility

Commonly used on:

• Flexible-impeller raw-water cooling systems

Typically suits:

• Engine models:

• Yanmar 6LY3-ETP, 6LY3-STP and 6LY3-UTP

• Yanmar 6LY3-STC and 6LY3-UTC

• Yanmar 6LY3-ETP 24V, 6LY3-STP 24V and 6LY3-UTP 24V

• Yanmar 6LY3-STC 24V

• HP Range: Engine-rating specific; commonly approximately 380HP-480HP

• Engine Type: Yanmar 6LY3 electronic inline-six marine diesel

• Year Range: Model-specific; confirm OEM pump 119578-42501

• Impeller Reference: JMP 7376-01K

• Service Kits: JMP JSK0127 / JSM0127

🔌 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