DJ-Y18001-A Aftermarket Yanmar 6AYM Seawater Pump 748660-42014-A | Sawley's Select Marine Parts

🔧 Product Description

Aftermarket DJ Pump Yanmar 6AYM seawater pump with drive gear - Replacement Part Number: DJ-Y18001-A

A complete geared seawater pump for Yanmar 6AYM-WST, 6AYM-WET and 6AYM-WGT marine diesel engines. It replaces the 748660-42012/-42013/-42014-A family and is supplied with the drive gear. The DJ pump is designed with service parts interchangeable within the DJ replacement assembly.

⚙️ Key Features

• Bronze body with stainless-steel shaft

• 65mm / 2.5-inch seawater ports

• Drive gear included

• Major and minor service kits available

• Designed for high-output 6AYM propulsion engines

🔄 Supersession & Cross Reference

OEM Supersession Chain:

• Yanmar 748660-42014-A → Later replacement for 748660-42013 and 748660-42012

OEM / Related Numbers:

• DJ-Y18001-A

• Yanmar 748660-42014-A

• Yanmar 748660-42013

• Yanmar 748660-42012

• Major service kit: DJ Y18001-MJK

• Minor service kit: DJ Y18001-MNK

Aftermarket / Verified Equivalents:

• DJ Pump: Y18001-A

Included Components:

• Complete seawater pump - Part Number: DJ-Y18001-A

• Drive gear - supplied fitted

🚤 Compatibility

Commonly used on:

• Flexible-impeller raw-water cooling systems

Typically suits:

• Engine models:

• Yanmar 6AYM-WST

• Yanmar 6AYM-WET

• Yanmar 6AYM-WGT

• HP Range: Approximately 659HP-911HP

• Engine Type: Yanmar 6AYM inline-six heavy-duty marine diesel

• Year Range: Model-specific; confirm OEM pump 748660-42014-A

• Seawater Connections: 2.5 in / 65mm

• Pump Weight: Approximately 24kg

• Packaged Weight with Gear: Approximately 26kg

🔌 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