JPR-YM04JHA Aftermarket Yanmar 3JH3E/4JH3E/TE/DTE/4JH4-TE Seawater Pump 129670-42513 | Sawley's Select Marine Parts

🔧 Product Description

Aftermarket JMP Yanmar 3JH3/4JH3/4JH4 seawater pump - Replacement Part Number: JPR-YM04JHA

A replacement bronze seawater pump for Yanmar 3JH3, 4JH3 and early 4JH4 marine engines. It replaces the 129670-42500 through 129670-42513 pump family and cross-references to Johnson 10-13328-02/-04.

⚙️ 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 129670-42513 → Later replacement for 129670-42512, -42511, -42510, -42501 and -42500

• Johnson 10-13328-04 / 10-13328-02 are original pump cross-references

OEM / Related Numbers:

• JPR-YM04JHA

• Yanmar 129670-42513

• Yanmar 129670-42512

• Yanmar 129670-42511

• Yanmar 129670-42510

• Yanmar 129670-42501

• Yanmar 129670-42500

• Johnson 10-13328-04

• Johnson 10-13328-02

• Major service kit: JMP JSK0130

• Minor service kit: JMP JSM0130

Aftermarket / Verified Equivalents:

• JMP Marine: JPR-YM04JHA

🚤 Compatibility

Commonly used on:

• Flexible-impeller raw-water cooling systems

Typically suits:

• Engine models:

• Yanmar 3JH3E and 3JH3E EPA

• Yanmar 3JH3CE and 3JH3CE1

• Yanmar 3JH3E-YEU-E

• Yanmar 4JH3E, 4JH3CE and 4JH3CE1

• Yanmar 4JH3-TE, 4JH3-TCE, 4JH3-THE and 4JH3-DTE

• Yanmar 4JH3-TE-YEU and 4JH3-DTE-YEU

• Yanmar 4JH4-TE, 4JH4-THE and 4JH4-HTE1

• HP Range: Engine-rating specific

• Engine Type: Yanmar JH-series three- or four-cylinder marine diesel

• Year Range: Model-specific; confirm OEM pump 129670-42513 family

• Service Kits: JMP JSK0130 major / JSM0130 minor

🔌 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