130-2343CN Aftermarket Onan MDKD 8kW Heat Exchanger 12 x 2 in | Sawley's Select Marine Parts

🔧 Product Description

Aftermarket replacement Generator Heat Exchanger - Replaces Part Number: 130-2343CN

New copper-nickel replacement heat exchanger for Onan MDKC, MDKD and MDKDJ marine generator sets. It replaces Onan 130-2343 and the related Sendure assemblies while retaining the compact 2-inch × 12-inch configuration.

⚙️ Key Features

• Replaces Onan 130-2343

• Approximately 2-inch diameter × 12-inch bundle

• Approximately 13-inch overall length

• Approximately 1-inch seawater hose connections

• Copper-nickel core with replaceable zinc protection

🧰 Kit / Assembly Contents

• 1 × Complete heat exchanger - P/N 130-2343CN

• 1 × Sacrificial zinc - replacement family Z9-147

• End-cap seals and mounting hardware are renewed separately unless included

🔄 Supersession & Cross Reference

OEM Supersession Chain:

• 130-2343CN → Replaces Onan 130-2343

• Sendure 4366-3-7 → Related replacement for 4366-1-7

• 12189-1-7 (related Sendure configuration)

OEM / Related Numbers:

• 130-2343

• 4366-3-7

• 4366-1-7

• 12189-1-7

• Z9-147

Aftermarket / Verified Equivalents:

• Mr Cool: MRC130-2343CN

• Seakamp: 130-2343CN

• Sendure: 4366-3-7

🚤 Compatibility

Commonly used on:

• Onan closed-cooled marine diesel generator sets

Typically suits:

• Engine / Equipment models:

• MDKC

• MDKD 8kW

• MDKDJ

• Output / Engine Rating: Approximately 8kW generator output on the principal MDKD application

• Engine / System Type: Closed-cooled marine diesel generator engine

• Year Range: Model/specification-dependent Onan production

• Serial / Model Identification: Confirm generator model, specification letter, exchanger diameter and hose orientation.

🔌 Function

The heat exchanger transfers engine or generator coolant heat into the raw-water circuit while keeping the two fluids separated. This maintains the correct closed-circuit operating temperature and protects the engine from direct seawater circulation.

Common signs of failure:

• Engine or generator overheating under sustained load

• Coolant loss without an obvious external hose leak

• Saltwater and coolant cross-contamination

• Restricted raw-water discharge or uneven end-cap temperature

• Corrosion, green staining, cracked solder joints or pressure-test failure

📦 Condition

• New aftermarket replacement part

• Brand new

• Supplied in original or equivalent packaging