FOR SALE Cummins 5.9 Marine 6BTA 250 Hp Diesel Engine. Celebrated for its mechanical simplicity and robust reliability. This engine has been tested.
The Cummins 6BTA 5.9-M is a renowned 5.9-liter, inline-6 cylinder marine diesel engine rated at 250 HP at 2600 RPM. Celebrated for its mechanical simplicity and robust reliability, it is widely used in both commercial and recreational vessels.
Key Specifications
- Configuration : 4-stroke, in-line 6-cylinder diesel
- Displacement : 5.9 L (359 in³)
- Aspiration : Turbocharged and aftercooled
- Rated Power : 250 HP @ 2600 RPM
- Fuel System : Inline injection pump
- Fuel Consumption : Approximately 48.1 L (12.7 gallons) per hour at rated power
PARTS In these Cummins 6BT Engines
- REMANUFACTURED CYLINDER BLOCK
- REMANUFACTURED CYLINDER HEAD
- NEW PISTONS
- NEW PIN (PISTON)
- NEW RINGS (PISTON)
- NEW MAIN BEARINGS
- NEW ROD BEARINGS
- REBUILT CONNECTING RODS WITH NEW TOP BUSHING
- NEW OIL PUMP
- REBUILT TURBOCHARGER
- REBUILT FUEL INJECTION PUMP
- REBUILT INJECTORS WITH NEW NOZZLES
- NEW FUEL LIFT PUMP
- NEW BELT
- NEW STARTER 12V
- REBUILT ALTERNATOR 12V
Common Applications
This engine is a popular choice for sportfishing boats, trawlers, and light commercial workboats. Because the ‘A’ designation indicates an Aftercooled (or intercooled) setup, it provides denser air to the cylinders, allowing for higher power output and better fuel efficiency than naturally aspirated or simply turbocharged versions.
Operational Tips & Maintenance
- Cooling Systems: Older models may have barely adequate cooling systems if run at the highest RPMs for extended periods. Regular maintenance of the heat exchangers, raw water pumps, and aftercoolers is crucial.
- Prop Selection: These motors must be able to reach their rated RPMs plus a slight margin around 2700RPM at Wide Open Throttle (WOT) when fully loaded. Being “over-propped” (where the engine cannot reach its maximum rated RPM) can lead to early engine wear or failure.
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