Denso 42800-5120 – 12V OEM Truck Starter Motor

• Voltage: 12 V
• Power: ~3 kW (≈ 4.02 HP)
• Rotation: Clockwise (CW)
• Type: Planetary gear reduction (PA90S / PLGR)
• Pinion Gear Teeth: 11 teeth
• Gear OD: ~1.567 in (≈ 39.8 mm)
• Mounting Ears: Two holes, 11.2 mm (unthreaded)
• Battery Stud: M10-1.5 threaded
• Motor Stud: M10-1.5 + connector
• Switch Terminal: Screw-type
• Weight: ~17.6 lbs (≈ 8 kg)
• Family: Denso PA90S

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