Cummins 4BTA Engine Parts

-
Select Parts Category

Parts for Cummins 4BTA Engines

Your Trusted Source for Cummins 4BTA Marine and Industrial Engine Parts

When performance, uptime, and durability matter most, Cummins 4BTA engines are the reliable choice for a wide range of marine and industrial applications. These 3.9L four-cylinder turbocharged engines are known for their simplicity, power density, and serviceability. Whether you're maintaining a diesel generator set in a remote facility or overhauling a marine propulsion system, Diesel Pro Power has you covered with high-quality Cummins 4BTA parts shipped fast and backed by world-class service.

At Diesel Pro Power, we specialize in marine-grade and industrial-spec components—not automotive swaps. Our inventory is engineered to support commercial marine vessels, auxiliary systems, industrial gensets, and more.

With a commitment to speed, accuracy, and customer satisfaction, we ship most orders within 24 hours—globally. If you're looking for Cummins 4BTA parts online, you've found the most dependable source.

Buy Cummins 4BTA Parts Online – Fast, Easy, Reliable

Everything You Need for Your Cummins 4BTA Engine

Our vast inventory ensures that you can find all the essential parts you need to keep your engine running at peak performance. All components are vetted for OEM compatibility, durability, and suitability for marine or industrial duty cycles.

Sea Water Pumps for Cummins 4BTA

We offer robust raw water (seawater) pumps built for continuous use in marine environments. Designed to handle the corrosive nature of saltwater and constant engine run times, these pumps include:

Marine-grade bronze housings
Marine grade impellers
High-temp seals and gaskets
Mounting flanges and pulleys

Also available:

Zinc anodes
Water strainers
Pump repair kits

Engine Rebuild Kits for Cummins 4BTA

We provide comprehensive engine overhaul kits tailored for marine and industrial duty. These kits simplify your rebuild and reduce downtime.

Included components:

Pistons and rings
Upper and lower gasket sets
Crankshaft main and rod bearings

Each rebuild kit is packaged to match specific marine or industrial configurations and can be adjusted based on your engine’s CPL (Control Parts List).

Cylinder Heads for Cummins 4BTA

Our replacement cylinder heads are precision-machined and ready to install, featuring:

New valves, springs, and keepers
Pressure-tested for leak-free performance

Accessories available:

Cylinder head bolts
Push rods
Rocker assemblies

Oil System Components For Cummins 4BTA

Maintaining proper oil pressure and cooling is critical in marine and industrial settings. We supply:

Oil filters
Oil coolers
Oil pumps and pickup tubes
Oil pressure switches and senders
Gaskets and oil pan hardware

All components are rated for extended-duty operation in high-load, high-temperature environments.

Fresh Water Pumps for Cummins 4BTA

For marine engines using closed-loop cooling systems, fresh water pumps are essential for circulating coolant through heat exchangers or keel coolers. Diesel Pro Power offers durable, high-quality fresh water pumps built to withstand prolonged use in corrosive and high-heat environments.

Our fresh water pump options include:

Impellers designed for high efficiency and minimal wear
High-temperature bearings and seals
Direct-fit mounting to simplify replacement

These pumps are compatible with both keel-cooled and heat exchanger-cooled systems, making them ideal for:

Marine propulsion engines
Onboard generator sets
Hydraulic engine-driven systems

We also carry fresh water pump gaskets, pulley assemblies, and thermostat housings for a complete installation or repair.

Fuel Injectors for Cummins 4BTA

Efficient combustion starts with precision fuel delivery, and that’s where our selection of Cummins 4BTA fuel injectorscomes in. Whether you're maintaining auxiliary marine power systems or 24/7 industrial generators, replacing worn injectors is key to keeping your engine running efficiently and cleanly.

Our inventory includes:

Direct replacement mechanical fuel injectors for marine and industrial engines
Injector nozzles and sealing washers
Injector return lines and fittings
Full injector sets or individual units for service flexibility

All injectors are factory tested for flow rate and spray pattern to ensure proper atomization, fuel economy, and power delivery.

Proper injector function is especially important for:

Reducing fuel consumption
Lowering emissions
Maintaining consistent engine power under continuous load

Need help identifying your injector type? Our team can assist with matching the correct injector based on your engine serial number or CPL.

Additional Cummins 4BTA Parts We Offer

Beyond core components, we maintain a full catalog of peripheral parts for holistic support:

Fresh water pumps (for closed-loop cooling systems)
Thermostats and temperature switches
Starters and alternators (12V and 24V marine-rated options)
Marine-grade electrical harnesses
Fuel lift pumps, filters, and injection pump accessories
Exhaust elbows, manifolds, and gaskets
Silicone hose kits
Belts and tensioners
Mounting brackets and vibration isolators
Control cables and marine-grade connectors

Each item is built to withstand salt exposure, moisture, and vibration—ideal for commercial marine and industrial diesel environments.

Why Buy Your 4BTA Cummins Parts From Diesel Pro Power?

Trusted by Thousands of Professionals

With over 15,000 satisfied customers worldwide, Diesel Pro Power has become a go-to source for mission-critical Cummins engine parts. Our success is built on a few simple principles:

24-Hour Global Shipping

We ship fast—really fast. Most orders leave our warehouse within 24 hours. Thanks to our high inventory turnover and efficient logistics, we support:

International marine fleets
Offshore installations
Remote industrial projects
Shipyards and dock operations

Ultra-Secure Website and Payment Portal

Our website is updated regularly with the latest encryption protocols and security patches. You can safely complete your transaction using major credit cards or wire transfers, with full confidence that your data is protected.

Easy-to-Navigate Online Catalog

We understand that not everyone is a diesel technician, so we’ve designed our online platform to be:

Intuitive: Easily search by engine model, CPL, or part type.
Accurate: All listings are cross-referenced with OEM part numbers.
Fast: Optimized for mobile and desktop browsing.

Unparalleled Customer Service

Our marine and industrial parts specialists are here to help. Whether you need help:

Identifying your engine’s CPL
Selecting the correct gasket thickness
Interpreting technical diagrams
Troubleshooting performance issues

…we’re just a phone call or email away. You’ll talk to real diesel professionals—not call center agents.

Common Marine and Industrial Applications for Cummins 4BTA Engines

The 4BTA is a workhorse across a range of non-automotive, professional-grade installations.

Marine Applications

Commercial fishing vessels: Engines that operate under full load for hours at sea.
Tugboats and workboats: Constant auxiliary engine use for hydraulic winches and electrical systems.
Harbor patrol and pilot boats: Reliable, quick-starting marine engines for utility craft.
Auxiliary generator sets on larger ships: For onboard lighting, refrigeration, and mechanical systems.
Bilge and firefighting pumps: Stationary and emergency-response systems.

Industrial Applications

Power generation: Backup and prime power diesel generator sets for remote facilities.
Pumps and compressors: Used in mining, construction, and agriculture for water or pneumatic systems.
Hydraulic power units: For cranes, presses, or offshore drilling rigs.
Material handling systems: Forklifts and lift engines (stationary platforms only).
Custom industrial machinery: Concrete plants, logging equipment, and sawmill automation.

The Cummins 4BTA’s balance of torque, efficiency, and simplicity makes it an ideal candidate where uptime is mission-critical.

Routine Maintenance Tips for Marine & Industrial Cummins 4BTA Engines

Proper maintenance extends engine life and reduces unexpected downtime. Follow these best practices based on application environment:

Marine Maintenance Checklist

Inspect and replace raw water impellers every 100 hours or at the start of every season.
Monitor and replace zinc anodes to prevent corrosion in saltwater systems.
Flush and clean heat exchangers regularly to remove salt and calcium buildup.
Grease and inspect control cables used in engine room throttle or shift linkages.
Check all hoses for cracking, stiffness, and salt deposits—especially near metal fittings.

Industrial Maintenance Best Practices

Replace fuel and oil filters on a strict hourly schedule (every 250–300 hours).
Use pre-cleaners or air filter wrap-arounds in dusty environments.
Keep a logbook of runtime hours for precise service intervals.
Maintain belt tension and alignment, especially on engines with high accessory loads.
Drain fuel/water separators regularly to prevent injector damage.

Recommended Replacement Cycles

Component	Marine Use	Industrial Use
Oil Filter	Every 150–200 hours	Every 250 hours
Fuel Filter	Every 100–150 hours	Every 200 hours
Raw Water Impeller	Every 100 hours or seasonally	N/A
Zinc Anodes	Every 3–6 months	N/A
Thermostat	Every 2 years	Every 2 years
Cylinder Head	As needed due to wear or overheat	As needed
Injectors	Every 3,000 hours	Every 4,000 hours
Belts	Every 2 years	Every 2 years

Contact Diesel Pro Power – Your Marine and Industrial Engine Experts

Ordering is simple—but we’re here if you need help. Whether you have a question about installation, part compatibility, or shipping options, our team is ready to assist.

Call Us

U.S. & Canada: 1-888-433-4735
International: +1-305-545-5588
Hours: Monday–Friday, 8 AM–5 PM EST

Or Email Us

Send us your engine serial number or a photo of your existing part, and we’ll confirm exactly what you need.

Why Diesel Pro Power is the Leader in Cummins 4BTA Support

To recap, here's why marine and industrial professionals around the world choose us:

Dedicated marine and industrial focus — no automotive content or generic listings
Lightning-fast shipping — orders ship within 24 hours globally
Marine-grade durability — salt-tolerant and vibration-tested parts
Huge in-stock inventory — ready-to-ship replacements for nearly every 4BTA configuration
Support from real experts — diesel technicians who know your engine inside and out

Engine Specifications & Applications of the Cummins 4BTA Engine

Overview of the Cummins 4BTA

The Cummins 4BTA engine represents one of the most popular and reliable powerplants in the Cummins B Series family. With its inline-four-cylinder layout, turbocharging, and aftercooling, the 4BTA is a performance-enhanced version of the 4BT, delivering higher horsepower and torque in the same compact 3.9L platform. Unlike its naturally aspirated cousin, the 4B, or the turbo-only 4BT, the 4BTA incorporates a turbocharger and an air-to-air or air-to-water aftercooler, depending on the configuration.

Built for rugged industrial, marine auxiliary, and power generation environments, the 4BTA has become a cornerstone engine across thousands of applications worldwide. With its mechanical fuel system, ease of servicing, and superior durability, the 4BTA is widely used in off-highway, stationary, and auxiliary systems, where uptime and reliability are top priorities.

While electronic versions exist, the most common and aftermarket-friendly 4BTA models are mechanically governed and pre-emissions, making them ideal for export markets, legacy equipment, and field-service fleets.

Cummins 4BTA Engine Specifications

Engine Attribute	Details
Configuration	Inline 4-cylinder, 4-stroke diesel
Displacement	3.9 liters (239 cubic inches)
Bore x Stroke	4.02 in x 4.72 in (102 mm x 120 mm)
Aspiration	Turbocharged & Aftercooled (Air-to-Air or Air-to-Water)
Fuel System	Mechanical direct injection (Bosch VE or inline pump)
Compression Ratio	17.5:1
Rated Horsepower	105–140 HP @ 2,500–2,800 RPM
Peak Torque	320–375 lb-ft @ 1,600–1,800 RPM
Oil Capacity	Approx. 10 quarts (9.5 liters)
Cooling System	Liquid-cooled, gear-driven water pump
Dry Weight	~850–900 lbs (385–408 kg)
Flywheel Housing	SAE #3 (other options available)
Emissions Rating	Pre-Tier 1, Non-electronic
Power Take-Off	Side and front PTO available
Service Life (Rebuild)	10,000–15,000+ hours with proper maintenance

Thanks to its strong torque output, excellent fuel economy, and compact footprint, the 4BTA can be used in almost any situation requiring dependable mid-range diesel power. It is especially effective in applications requiring low-RPM torque for hydraulic or mechanical work, such as in marine auxiliary drives, construction platforms, or pumping systems.

Applications of the Cummins 4BTA Engine

The 4BTA engine is designed for heavy-duty work in environments where ruggedness, compactness, and fuel efficiencyare essential. It’s well-known in the industrial world for its ability to deliver high performance while operating under extreme load and temperature conditions. Its mechanical simplicity also makes it easily repairable, with globally available parts and rebuild kits.

Below are the most common aftermarket applications for the Cummins 4BTA engine in marine and industrial markets.

1. Marine Auxiliary and Generator Applications

The Cummins 4BTA is a top choice for marine auxiliary systems and onboard generator sets, especially where turbocharged performance and mechanical reliability are required.

Marine Use Cases:

30–80 kW marine generator sets
Hydraulic power units (winches, cranes, ramps)
Desalination plant drives
Fire pump and bilge pump engines
Refrigeration compressor power units
Auxiliary propulsion or support engine on workboats

Its aftercooled induction system improves intake air density, which enhances fuel combustion, especially in marine environments with restricted air flow. The turbo also provides much-needed performance at low RPM, allowing the engine to maintain speed and torque under heavy loads.

2. Power Generation

The 4BTA is widely deployed in stationary and mobile diesel generator systems, where long run times and consistent output are mission-critical.

Generator Applications:

Prime power gensets for remote facilities or rural utilities
Standby backup power for telecom, hospitals, and water systems
Oilfield trailer-mounted generators
Emergency field units for disaster relief or humanitarian work

Its mechanical governor system is especially valued in generator applications because it allows for simplified wiring and analog controls, reducing complexity and failure points in harsh conditions.

3. Construction & Mining Equipment

The Cummins 4BTA is found in a wide variety of mid-sized construction machines, particularly those requiring long hours of operation and resistance to dust, heat, and mechanical vibration.

Common Equipment Types:

Skid steers and mid-size loaders
Compact excavators
Telehandlers and material lifts
Pavers, trenchers, and compactors
Portable light towers and compressors
Drilling support rigs and pump skids

The high torque at low RPM makes it particularly suitable for hydraulic-driven machinery, where consistent engine speed under load is necessary to keep pumps operating within performance specs.

4. Agricultural Equipment

On farms and ranches, the 4BTA is ideal for medium-duty power tasks, especially in pumping, irrigation, feed processing, and mobile platform roles.

Agricultural Applications:

Diesel irrigation pump engines
Feed mixer wagons and grinders
Auger conveyors and mobile elevators
Small tractor repowers
Standby generators for barns and cold storage

Its fuel economy and air-cooled turbocharger make it well-suited for seasonal work, where engines sit idle for part of the year but must start reliably and work hard when needed.

5. Oil & Gas Industry Support Equipment

In petroleum and natural gas field operations, the 4BTA plays a key role as a support engine for non-primary systems.

Oilfield Applications:

Skid-mounted mud pump drives
Diesel compressors and injectors
Portable generators on rig trailers
Hydraulic pump units for handling and lifting
Remote monitoring equipment power sources

Its rugged build and easy field servicing make it ideal for use in environments far from dealership infrastructure.

6. Export and Repower Markets

Due to its pre-emissions, mechanical injection design, the Cummins 4BTA remains a top engine choice in global export and legacy repower markets.

Global Use Cases:

Generator sets shipped to South America, Africa, or Asia
Repower engines for off-road construction equipment
Agricultural engines exported to non-Tier 4 countries
Marine support engines for harbors, tugboats, or barges
Utility vehicle conversions and field tool carriers

Its shared component architecture with the Cummins B Series family ensures parts are readily available, and rebuilds can be performed locally without electronic diagnostic tools.

Why Choose the Cummins 4BTA for Marine or Industrial Use?

Turbocharged and Aftercooled Efficiency – Delivers more power at a cooler temperature with better fuel economy than non-aftercooled models.
Mechanical Reliability – No complex ECUs or emissions hardware to fail in the field.
Compact and Powerful – Fits into tight spaces while delivering torque comparable to larger engines.
Easy to Service – Global support network and vast aftermarket parts availability.
Long Service Life – Known to run over 15,000 hours with scheduled maintenance.
Flexible Installations – Configurable for side PTO, front-drive accessories, and different flywheel housings.
Global Compatibility – Used and supported in nearly every industrialized and developing nation.

Conclusion

The Cummins 4BTA engine delivers one of the best combinations of performance, durability, and mechanical simplicity in its class. From remote mining generators to auxiliary marine systems and legacy construction equipment, the 4BTA continues to provide unmatched service in markets where uptime and reliability are mission-critical.

Whether you're maintaining a mobile generator, repowering a pump skid, or supporting hydraulic systems on a marine vessel, the 4BTA remains one of the most dependable diesel platforms available in the global aftermarket.