✅ Compatibility

• Make: Cummins
• Engine Family: Cummins B-series diesel — 4BT / 6BT platform
• Voltage: 24V (heavy-duty commercial / industrial electrical system)
• Power: 6kW (high-output heavy-duty starter)
• OEM / Cross Reference Part Numbers:
  • Cummins: 5565911
• Fits Cummins B-Series Diesel Engines:
  • Cummins 4BT (B3.9) — 3.9L 4-cylinder turbocharged diesel — 75–105HP — light truck / construction / agricultural / marine / generator / industrial equipment
  • Cummins 6BT (B5.9 / —12-valve”) — 5.9L 6-cylinder turbocharged diesel — 160–215HP — medium-duty truck / heavy construction / marine / agricultural / industrial / generator
• Typical Applications (24V system):
  • Medium and heavy-duty commercial trucks and buses (24V electrical system)
  • Construction equipment: excavators, wheel loaders, motor graders, compactors
  • Agricultural equipment: large tractors, combine harvesters, sprayers
  • Marine applications: commercial fishing vessels, workboats, crew boats
  • Industrial generator sets: standby and prime power
• ⚠️ 24V System — Verify Before Ordering: This is a 24V starter motor. Do NOT use on 12V systems. Verify your Cummins engine model (4BT / 6BT), application system voltage (24V), and existing starter part number before ordering. Contact us for fitment confirmation.

🔧 Product Highlights

• Direct OEM Replacement — Cummins 5565911 24V 6kW Starter for 4BT and 6BT B-Series Diesel Engines: Drop-in fit for all Cummins 4BT (3.9L) and 6BT (5.9L) B-series diesel engine applications on 24V electrical systems — matching original Cummins 5565911 24V 6kW starter specifications for reliable heavy-duty cranking across all 4BT and 6BT applications in commercial, construction, agricultural, marine, and industrial environments
• 6kW High-Output 24V Design — Maximum Cranking Power for Large-Displacement B-Series Diesel Engines in Demanding Conditions: At 6kW on a 24V system, this is one of the highest-output starters in the Cummins B-series aftermarket — delivering the sustained cranking torque required to reliably start the Cummins 4BT and 6BT under cold-weather conditions, heavy-load applications, and high compression ratios. The 24V / 6kW combination provides significantly greater cranking energy than 12V equivalents, essential for commercial and industrial duty cycles
• Cummins 4BT (B3.9) — The World’s Most Versatile Compact Heavy-Duty Diesel Engine: The Cummins 4BT is a 3.9L 4-cylinder turbocharged diesel engine with a global reputation for exceptional reliability, long service life, and remarkable versatility — used in light commercial trucks, transit buses, construction equipment, agricultural machinery, marine vessels, standby generators, and specialty vehicles worldwide. The 4BT is also one of the most popular diesel engines for custom vehicle conversions and powertrain swaps globally, with an extraordinarily large and active worldwide owner community
• Cummins 6BT (B5.9 / —12-Valve”) — One of the Most Respected and Widely Owned Heavy-Duty Diesel Engines in the World: The Cummins 6BT 5.9L 12-valve is widely regarded as one of the greatest heavy-duty diesel engines ever produced — renowned for its mechanical simplicity, exceptional durability, and legendary longevity. Used in Ram 2500/3500 pickup trucks (1989–1998), medium-duty commercial trucks, construction equipment, marine applications, and industrial generator sets, the 6BT has one of the largest and most passionate global owner communities of any diesel engine. High-mileage 6BT engines routinely achieve 500,000 to 1,000,000+ miles with proper maintenance
• 24V Application — Commercial Truck, Heavy Construction, Marine, and Industrial Generator Market: The 24V 6kW specification targets the commercial and industrial application segment of the Cummins 4BT / 6BT market — medium and heavy-duty trucks, buses, construction equipment (excavators, loaders, graders), marine commercial vessels, agricultural machinery, and standby generator sets where 24V electrical systems are standard for reliable high-current starting of large-displacement diesel engines
• Cummins B-Series — Cummins’ Most Widely Deployed Engine Family Globally with Unmatched Parts Availability: The Cummins B-series (4BT and 6BT) is one of the most widely produced and distributed diesel engine families in history — with millions of units deployed across every continent in commercial vehicles, construction equipment, agricultural machinery, marine vessels, and power generation. Cummins’ global distribution network and the B-series’ massive installed base ensure sustained long-term aftermarket demand for quality replacement starters

📦 What's Included

• 1× Starter Motor 24V 6kW — New Aftermarket (Cummins 5565911)

🔑 Key Specs

• Cummins Part Number: 5565911
• Voltage: 24V (heavy-duty commercial / industrial — NOT compatible with 12V systems)
• Power Output: 6kW
• Compatible Engines: Cummins 4BT (B3.9 — 3.9L 4-cylinder) — Cummins 6BT (B5.9 — 5.9L 6-cylinder —12-valve”)
• Application: Commercial / heavy-duty truck — construction equipment — agricultural machinery — marine — industrial generator set — 24V electrical system
• Condition: New Aftermarket
• SKU: 5565911

⚠️ IMPORTANT: This is a 24V starter motor. Do NOT install on a 12V system. Please verify your Cummins engine model (4BT / 6BT), application system voltage (24V), and existing starter part number before purchasing. Contact us if unsure — we are happy to confirm fitment for your Cummins 4BT or 6BT application.