4M50 | Aftermarket Replacement | Starter Motor Compatible with Excavator Diesel Engine

1. Product Overview & Wholesale Price Range

4M50 Starter Motor is core engine starting component for 4M50 power unit. Common replacement scenarios include difficult engine cranking, intermittent starting, abnormal gear noise and starter coil burnout fault.

• Factory Wholesale Price: $158 – $220 USD Direct factory price for machinery repair workshops
• Material Specifications: High‑durable copper coil, reinforced drive gear, heavy‑duty housing, good heat dissipation, anti‑wear performance, long service life
• MPN / Part Parameter:4M50‑STARTER‑MOTOR
• Fit Application: Starting assembly compatible with 4M50 diesel engine
• MOQ & Bulk Discount: 1 Unit, favorable price for bulk maintenance orders
• Lead Time: 1‑3 working days, sufficient stock supports global logistics shipment
• Warranty: 12‑month replacement warranty, full load and rotation test finished before shipment

2. Application Scope

This starter motor is customized for 4M50 engine overhaul:

• Engine Overhaul: Direct replacement for original damaged starter motor assembly.
• Starting Fault Repair: Fix hard cranking, intermittent start, gear grinding noise and coil burning malfunctions.
• Repair Workshop Usage: Standard installation dimension, stable starting torque, easy installation.
• Overseas Parts Reseller: Stable stock quantity, complete QC documents to support cross‑border engine spare‑part business.

3. Common Starter Motor Failure Troubleshooting

• Fault 1: Engine Can Not Crank Up
  Cause: Coil burnout, carbon brush wear, poor wiring contact, battery insufficient power.
  Solution: Install brand‑new starter motor, check battery and cable connection.
• Fault 2: Abnormal Grinding Noise When Starting
  Cause: Drive gear wear, flywheel ring gear damage, mounting offset.
  Solution: Replace starter motor, inspect flywheel gear condition synchronously.
• Fault 3: Intermittent Starting Response
  Cause: Worn carbon brush, solenoid contact ablation, loose connector.
  Solution: Fit new starter motor, clean circuit terminals.
• Fault 4: Starter Overheating & Burn‑out
  Cause: Long‑time continuous cranking, short circuit inside coil, voltage mismatch.
  Solution: Replace starter motor, verify system voltage parameter.

4. Matching Engine Spare Parts Recommendation

5. Frequently Asked Questions

Q1: How do I confirm this starter motor fits 4M50 engine?
A: Verify engine model 4M50 before placing your order, check mounting dimension and interface.

Q2: What quality inspection will be done before shipment?
A: Each starter motor completes no‑load rotation and full‑load torque testing before delivery.

Q3: What points need attention during installation?
A: Disconnect battery power first, clean mounting surface, check gear meshing clearance, tighten mounting bolts evenly.