Cummins 6CT Engine Parts for Marine and Industrial Use

The Cummins 6CT engine is one of the most respected platforms in the diesel engine market. Designed for longevity, performance, and versatility, it powers both marine vessels and industrial equipment across the globe. Whether you're performing regular maintenance or a full engine rebuild, Diesel Pro Power offers a comprehensive selection of Cummins 6CT parts—backed by expert support and 24-hour worldwide shipping.

About the Cummins 6CT Engine

A Legacy of Strength and Versatility

The 6CT engine is part of Cummins’ C Series family, offering 8.3 liters of displacement in an inline 6-cylinder configuration. It combines robust design with high torque output and impressive fuel economy, making it ideal for applications where uptime and reliability are critical.

Engine Highlights:

• Displacement: 8.3L (506 cubic inches)

• Configuration: Inline 6-cylinder

• Power Output: Up to 430 HP depending on tuning and configuration

• Fuel System: Mechanical (early models) or electronic (later 6CTA models)

• Cooling: Seawater/freshwater cooled (marine) or radiator cooled (industrial)

• Aspiration: Turbocharged and aftercooled

The 6CT platform is known for its high torque at low RPMs, simple maintenance requirements, and long service life—all qualities that have made it a favorite in both marine propulsion and industrial operations.

Applications for the Cummins 6CT Engine

Marine Applications

The 6CT is widely used in:

• Trawlers and fishing boats

• Crew boats and pilot vessels

• Passenger ferries and tour boats

• Harbor service boats and commercial craft

• Auxiliary marine power systems

Its ability to operate efficiently under heavy load and its compatibility with marine cooling systems make it a top pick for commercial fleets and private operators.

Industrial Applications

Outside of marine use, the Cummins 6CT also powers:

• Excavators and wheel loaders

• Irrigation and industrial water pumps

• Standby and prime power generators

• Construction machinery and drilling rigs

• Off-road agricultural vehicles

The 6CT’s adaptability allows for both stationary and mobile applications, giving it an edge in sectors that demand uptime, durability, and simple serviceability.

Buy Cummins 6CT Parts Online

At Diesel Pro Power, we make it easy to buy genuine and aftermarket Cummins 6CT parts online. Our catalog is optimized for speed, accuracy, and ease of use—whether you’re an engineer, fleet manager, or boat owner.

Freshwater Pumps for Cummins 6CT

Maintain engine temperature and prevent overheating with high-performance freshwater components:

• Freshwater pump assemblies

• Thermostat kits

• Pump seals and fan belts

• Radiator cleaners and coolant additives

Our pumps are covered by warranty and built for continuous marine or industrial duty.

Cylinder Heads for Cummins 6CT

Ensure optimal compression and combustion with quality head components:

• Complete cylinder heads (with or without valves and springs)

• Valve seals, valve springs, and head bolts

• Exhaust valves and intake valves

• Head gasket sets and torque specs documentation

All heads are pressure-tested and machined to meet Cummins standards for flatness, seal quality, and valve seating.

Rebuild Kits for Cummins 6CT

Restore your engine to like-new condition with one of our comprehensive rebuild options:

• Pistons and piston ring sets

• Lower and upper gasket sets

• Connecting rod shell sets

• Crankshaft shell sets

• Thrust washers and main bearings

We also offer individual rebuild components like piston kits, head gasket kits, and seal kits for targeted repairs.

Seawater Cooling Components For Cummins 6CT

If your Cummins 6CT is in a marine vessel, you’ll need durable seawater components to keep it cool and corrosion-free:

• Raw water pump assemblies

• Thermostats and temperature sensors

• Basket strainers and zinc anodes

• Seawater hoses and clamps

These parts are marine-grade and optimized for long life in saltwater environments.

Additional Cummins 6CT Parts Available Online

We carry an extensive list of additional components to keep your Cummins 6CT engine running reliably:

Crankshafts and Rotating Assemblies For Cummins 6CT

• Crankshafts

• Main bearings and connecting rods

• Vibration dampers

• Crankshaft seals

All rotating assemblies are balanced to OEM specs and ideal for full rebuilds.

Marine Cables and Switches For Cummins 6CT

• Marine throttle and shift cables

• Toggle switches

• Start/stop switch kits

• Remote control panels

Engineered for resistance to saltwater, vibration, and continuous-duty cycles.

Oil and Fuel Filters For Cummins 6CT

• Spin-on oil filters

• Fuel/water separator filters

• Mounting bases and brackets

• Filter wrenches and accessories

High-filtration media ensures extended engine life and cleaner performance.

Sensors, Gauges, and Electronics For Cummins 6CT

• Oil pressure sensors

• Water temperature sensors

• Tachometers, voltage gauges, and hour meters

• Multi-function gauge panels

All electronics are designed for marine or rugged industrial use, fully sealed and tested for accuracy.

Gaskets, Sealants, and Paint For Cummins 6CT

• Full engine gasket kits

• RTV silicone sealants and threadlockers

• Cummins red and black engine enamel

• Degreasers, flushes, and corrosion protectants

Finish your repairs with professional-grade sealing and paint solutions.

Why Buy Cummins 6CT Parts from Diesel Pro Power?

24-Hour Worldwide Shipping

Every in-stock item is shipped within 24 hours—delivered to ports, job sites, shops, and marinas across the globe.

Expert Customer Service

Need help finding the right part? Our experienced customer service team provides:

• Compatibility checks

• Installation advice

• Custom shipping support

• Rebuild recommendations

Reach us by phone or email for expert, friendly help.

Over 40,000 Satisfied Customers

We’ve built trust by offering high-quality parts, fast delivery, and honest service. That’s why over 40,0000 customers return to Diesel Pro Power.

Easy-to-Use Website

Our intuitive interface helps you:

• Search by engine model or part number

• Use visual aids to identify parts

• Add items to cart and checkout securely in minutes

Verified Reviews

See why marine engineers, contractors, and boat owners rate Diesel Pro Power as the go-to source for Cummins 6CT parts.