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1_d34ec503-11b2-4d50-91d4-a08bda63a2e6 - Northline Parts

Starter Motor 31A66-00102 for ATLAS Excavator AM29R AM48R Engine S4L S4Q2 S4L2

Alligator_819_x_200_px - Northline Parts

The Aftermarket Parts Specialists

$255.79
Sale price  $255.79 Regular price 

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Ships Nationwide in 2–4 business days.
This Starter Motor is a high-quality aftermarket replacement part compatible with ATLAS Excavator AM29R AM48R and matches OEM Part# 31A66-00102.

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I reached out for some replacement head bolts and they responded quickly with a few questions and cautionary information and is sending me some bolts. Great customer service! Thanks

Edward H. — Verified customer

Product Overview

This heavy-duty starter motor is engineered to provide reliable ignition for ATLAS excavators. It is designed to meet or exceed original equipment standards, ensuring consistent performance in demanding construction environments.

Key Features & Performance

  • Precision-machined components for maximum durability
  • High-torque design for rapid engine engagement
  • Built to withstand extreme temperature fluctuations
  • Corrosion-resistant housing for long-term service life

Fitment & Compatibility

  • ATLAS Excavators: AM29R, AM48R
  • Engine Models: S4L, S4Q2, S4L2

Technical Specifications

  • Part Name: Starter Motor
  • Part Number(s): 31A66-00102
  • Engine Compatibility: S4L, S4Q2, S4L2
  • Equipment Type: Excavator

Frequently Asked Questions

Q: Is this an OEM part? A: No, this is a high-quality aftermarket replacement part designed to meet or exceed original equipment specifications. Q: Does this unit include the solenoid? A: Yes, this is a complete starter motor assembly ready for direct installation.

Compatibility may vary by serial number. Verify fitment before purchase.

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Service was professional and easy to work with. They kept me updated on my order and recommended a different part when the one I originally picked wasn’t going to work. Everything showed up as expected and the process was smooth overall.

- Customer, Chris D.

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