✅ Compatibility

• Make: Cummins / Freightliner / Kenworth / Sterling / Spartan / Timberjack / Hyster / Mercury Marine / Perkins / and more
• Compatible Engines: Cummins 3.9L 4BT / 4BTA / 5.9L 6BT / 6BTA Diesel (B-series)
• OEM / Cross Reference Part Numbers:
  • Cummins: 3604648RX, 3604654, 3604654RX, 3916854, 3918376
  • Delco: 10461285, 10461479, 10461717, 10465026, 10465043, 10465211, 10465365, 1113276, 1113292, 1998456, 1998490, 1998522, 323-419, 323-487
  • Bosch: F042003088, SR9973X
  • Clark: 06916544
  • Mercury Marine: 50-805991
  • Lester: 6573, 6583
  • Wilson: 91-01-4313, 91-01-4366
• Fits Freightliner Trucks: FC80 / FL50 / FL60 / FL70 / FL80 / FLB / FLD112 / FLD120 / MB Line / XB Line — Cummins 5.9L L6 (1994–2001)
• Fits Kenworth Trucks: T300 / K300 — Cummins 5.9L / 7.2L L6 (1996–2007)
• Fits Sterling Trucks: Acterra 5500 / 6500 / 7500 / 8500 / SC7000 — Cummins 5.9L L6 (1999–2001)
• Fits Cummins Engines (direct): 3.9L 4BT / 4BTA (1994–2004) / 5.9L 6BT / 6BTA (1990–2004) / B-series (1994–2004)
• Fits Industrial / Construction / Marine:
  • Hyster H-120XM / H-230H-D Cummins (1999–2012)
  • Timberjack 230 / 610 Cummins 4BT (1989–1999)
  • Mercury Marine / Mercruiser 6BTA5.9-M (1989–1996)
  • Ingersoll Rand 70 Pro Pac / Cyclonaire Cummins (1990–2007)
  • Perkins 4-236M (various)
  • Spartan Motors Alpine / Gladiator / Mountain Master (2003–2008)
• Note: Verify your engine model, equipment, and existing starter part number before ordering. Contact us with your engine serial for fitment confirmation.

🔧 Product Highlights

• Direct OEM Replacement: Drop-in fit for Cummins B-series 3.9L / 5.9L diesel applications — matches original Delco 28MT OSGR 12V / 10-tooth CW, 2.9kW, 3-bolt 11mm unthreaded mount, 3-terminal solenoid, wet clutch seal specifications
• Delco 28MT — The Heavy-Duty OSGR Starter for Cummins B-Series Diesel: The Delco 28MT is the heavy-duty OSGR starter used across Cummins B-series 3.9L / 5.9L diesel applications — one of the most widely deployed heavy-duty starter families in North American commercial trucking, construction, and industrial equipment
• Cummins B-Series 3.9L / 5.9L — The Most Widely Used Diesel Engine in North American Medium-Duty Trucks: The Cummins 4BT 3.9L and 6BT 5.9L are among the most widely used diesel engines in North American medium-duty trucks, construction equipment, and marine applications. The 6BT 5.9L (the predecessor to the legendary Cummins ISB) powers Freightliner, Kenworth, and Sterling medium-duty trucks
• Covers 50+ Equipment Models Across 20+ Brands: One starter covers Freightliner, Kenworth, Sterling, Spartan, Timberjack, Hyster, Mercury Marine, Ingersoll Rand, Perkins, and more — all sharing the Cummins B-series engine and Delco 28MT starter specification
• Wet Clutch Seal Included: This starter includes a wet clutch seal — essential for marine and wet-environment applications (Mercruiser, Timberjack, etc.)

📦 What's Included

• 1× Starter Motor 12V / 10T OSGR CW 2.9kW (3604654 / 10465026) — New Aftermarket

🔑 Key Specs

• Cummins Part Numbers: 3604654, 3604648RX, 3604654RX, 3916854, 3918376
• Delco Part Numbers: 10465026, 10465043, 10465211, 1113276, 1998456
• Bosch Part Numbers: SR9973X, F042003088
• Voltage: 12V
• Power: 2.9kW / 3.89HP
• Pinion Teeth: 10T
• Rotation: Clockwise (CW)
• Type: OSGR (Over-running Sprag Gear Reduction)
• Family: Delco 28MT
• Wet Clutch Seal: Yes
• Weight: 19 lbs / 8.64 kg
• Compatible Engines: Cummins 3.9L 4BT / 4BTA / 5.9L 6BT / 6BTA Diesel
• Applications: Medium-duty trucks / Construction / Industrial / Marine
• Condition: New Aftermarket
• SKU: 3604654

⚠️ Please verify your engine model, equipment, and existing starter part number before purchasing. If unsure of compatibility, contact us with your Cummins engine serial number and we will confirm fitment.