Parts for Cummins 4BT Engines

Why Diesel Pro Power is the Trusted Choice for Cummins 4BT Parts

At Diesel Pro Power, we understand the critical role reliable engine components play in marine and industrial operations. That’s why we offer a comprehensive catalog of high-quality parts specifically for the Cummins 4BT engine—a powerhouse known for its durability, simplicity, and performance in demanding work environments.

Whether you’re maintaining a commercial fishing vessel, servicing a barge’s auxiliary systems, or operating a diesel-powered generator in an industrial plant, you can count on the Cummins 4BT. But even an engine this dependable requires occasional maintenance and component replacement—especially under the relentless strain of saltwater exposure, continuous run cycles, and tough industrial workloads.

Diesel Pro Power makes it easy to source exactly what you need. With fast international shipping, secure checkout, and top-tier customer support, we take the hassle out of getting Cummins 4BT parts to your dock or worksite.

Extensive Inventory of Cummins 4BT Engine Parts

We carry a broad range of parts for 4BT engines used in marine propulsion, generator sets, hydraulic drive systems, and other industrial power platforms. From engine internals to cooling systems, Diesel Pro Power is your one-stop shop for everything Cummins 4BT.

Engine Overhaul Kits for Cummins 4BT

For full engine rebuilds, our overhaul kits are engineered to provide all essential internal components. These kits are especially popular among:

• Shipyard mechanics

• Dockside maintenance crews

• Industrial equipment refurbishers

Each overhaul kit typically includes:

• Pistons and rings

• Cylinder liners

• Main and connecting rod bearings

• Full gasket set

• Oil seals

• Valve train components

We also offer options for both marine-rated and industrial-duty versions of the 4BT engine. If you’re unsure which kit is right for your engine's serial number or spec, our team can guide you.

Fresh Water Cooling System Parts for Cummins 4BT

For 4BT marine installations using fresh water cooling loops, we carry:

• Fresh water pumps

• Thermostats

• Silicone coolant hoses

• Expansion tanks

• Heat exchanger support hardware

Marine applications, especially those using keel cooling or heat exchangers, benefit from replacing these parts proactively—minimizing the risk of overheating during long transits or heavy-duty auxiliary usage.

Sea Water Pumps and Raw Water Systems for Cummins 4BT

For engines running raw water cooling or seawater heat exchangers, we offer:

• Raw water pumps (gear and belt-driven options)

• Impellers and repair kits

• Bronze pump housings

• Gaskets and seals

• Strainers and sea cocks

• Mounting flanges

Saltwater is unforgiving. That’s why all our seawater system parts are designed for marine conditions—resisting corrosion, pitting, and wear.

Cylinder Heads for Cummins 4BT

Cylinder head issues are a leading cause of power loss or overheating. Our marine-grade and industrial-ready 4BT cylinder heads feature:

• 7mm and 9mm injector tube options

• Reinforced coolant ports for extended run cycles

• Compatibility with standard or marine-specific valves

• New or remanufactured versions, fully pressure-tested

Perfect for diesel-driven pumps, stationary power units, or primary marine propulsion systems, these heads are a direct fit for all major 4BT variants.

Gauges and Monitoring Systems

Monitor your 4BT’s performance with our line of commercial-grade gauges:

• Oil pressure

• Water temperature

• RPM/tachometers

• Boost pressure

• Hour meters

Options are available in analog or digital formats, and all marine options are waterproof and corrosion-resistant. These are ideal for:

• Engine control panels

• Generator readouts

• Pump monitoring systems

• Bridge or helm stations

Fuel System Components for Cummins 4BT

Reliable fuel delivery is essential for engines that run for hours—sometimes days—without stopping. We offer:

• Fuel lift pumps

• Inline fuel filters and bases

• Fuel injectors and nozzles

• Injection pumps for marine and industrial calibrations

• Fuel hose kits

All fuel components are compatible with marine diesel blends and bio-diesel where applicable.

Lubrication System Parts for Cummins 4BT

The 4BT lubrication system is designed for long-lasting service—but oil pressure loss can be catastrophic if neglected. We stock:

• Oil pumps

• Oil coolers

• Oil pans and gaskets

• Spin-on oil filters

• Oil filter bases

Ideal for any 4BT used in hydraulic power packs, marine bilge systems, or heavy-duty gensets.

Electrical Components and Sensors for Cummins 4BT

Keep your 4BT starting reliably and running within spec with our range of electrical parts:

• Starters (12V and 24V)

• Alternators

• Senders for oil, temperature, and RPM

• Glow plugs (for cold marine climates)

• Solenoids and pre-heat modules

All electrical components are available in marine-rated versions, sealed against corrosion and built to handle engine-room vibration.

Built for Marine and Industrial Applications Only

The Cummins 4BT engine is not just a favorite for its power-to-weight ratio—it’s a workhorse specifically engineered for durability. Diesel Pro Power supports two core application areas for this engine:

Marine Power Systems

Used in hundreds of vessel types worldwide, the Cummins 4BT serves in:

• Workboats: Powering propulsion or hydraulic gear like winches and cranes.

• Fishing Vessels: Durable operation during long days and nights at sea.

• Auxiliary Drives: Running generators, bilge systems, fire pumps, and cooling fans.

• Patrol and Harbor Craft: Compact, easily serviceable engine for maneuverable vessels.

Whether installed as the main engine or for auxiliary power, the 4BT’s simple mechanical setup makes it ideal for maritime environments where reliability is critical.

Industrial Equipment and Fixed Power

In non-marine contexts, the 4BT excels in powering:

• Stationary diesel generators

• Irrigation pumps and water movers

• Hydraulic power units

• Construction and plant equipment (non-road)

• Factory compressors and blowers

Its lack of electronics, compatibility with off-grid power, and minimal footprint make it a favorite in industrial settings worldwide.

Maintenance Tips for Marine and Industrial Cummins 4BT Engines

Ensuring longevity in these environments means following specific best practices:

Marine Maintenance Guidelines

• Replace impellers every 100 hours or annually

• Inspect sea water pump seals quarterly

• Clean and flush the heat exchanger after every season

• Monitor zinc anodes to prevent saltwater corrosion

Industrial Maintenance Guidelines

• Monitor coolant pH and top off with deionized water

• Change fuel filters monthly if running on high-sulfur or poor-quality diesel

• Keep belts properly tensioned—especially in dusty factory conditions

• Regularly inspect mounts to avoid vibration-induced failures

Replacement Schedules for Key 4BT Components

Technical Support You Can Count On

When you purchase from Diesel Pro Power, you’re backed by a team of marine and industrial engine experts. Our specialists assist with:

• Identifying part numbers

• Diagnosing symptoms

• Cross-referencing outdated components

• Installation advice

Need help? Call us:

• U.S.: 1-888-433-4735

• International: 305-545-5588

Payment, Warranty, and Shipping Simplicity

We make international and domestic ordering effortless:

• Secure Payments: Pay via card or wire transfer in USD

• Prepaid Duties: Avoid customs holdups

• Fast Fulfillment: Most orders ship in 24 hours

• Warrantied Parts: Full warranty coverage on every item

Wherever your dock, plant, or station is located, we’ll get your Cummins 4BT parts there—fast.

Summary: Why Diesel Pro Power is Your #1 Cummins 4BT Source

Diesel Pro Power has become the leading supplier for marine and industrial Cummins 4BT parts by focusing on three key things:

• Massive Inventory: Ready-to-ship parts for every system

• Marine & Industrial Focus: No auto parts, no distractions

• True Expertise: A team that understands your engine environment