Description:
PP-130-6548-02 Onan Heat Exchanger Assembly
The PP-130-6548-02 Heat Exchanger Assembly is a marine grade replacement designed for Cummins Onan MDK series marine diesel generator sets, most commonly in the 17.5 kW operating range.
This unit forms the core of the generator’s closed circuit cooling system, transferring heat from the engine’s fresh water coolant loop to the raw water circuit. Engine coolant flows through the internal tube bundle while seawater circulates around the outer shell, efficiently carrying heat away before the coolant is recirculated through the generator engine.
Effective coolant temperature control is critical for stable generator operation under continuous electrical load. A correctly functioning heat exchanger helps prevent overheating, protects cylinder heads, liners, and gaskets, and supports consistent electrical output and long service life in demanding marine environments.
Manufactured to match OEM dimensions, port orientation, and mounting geometry, the 130-6548-02 is a true direct fit replacement for the original Cummins Onan component. It installs without modification to existing hoses, brackets, or pipework, making it suitable for planned maintenance, corrosion replacement, or preventative servicing.
Suits Cummins Onan:
• MDKAD
• MDKAE
• MDKBP (Spec A–C)
• MDKBR (Spec A–C)
• MDKBS
• MDKBV
• MDKBU
• MDKDR – 17.5�kW (including MDKDR 8202A)
• Cummins Onan MDK series marine diesel generator sets fitted with closed circuit (fresh water cooled) systems
Replaces / Interchangeable With:
• Cummins Onan: 130-6548-02
• Onan: 130-4433 / 130-4433-01
• Onan: 130-5006
• Onan: 130-7490-02
• Onan: 130-7986 / 130-7986-02
• Seakamp / Sen Dure CN suffix equivalents