Description
STG50771 Starter 45-2177 45-2324 for Thermo King Sl100 Sl200 Sl300 Sl400
Technical Specifications:
- Part Number:
- Primary: STG50771
- Thermo King OEM: 45-2177, 45-2324, 845-2177, 845-2324
- Hitachi OEM: S13-407, S13-407A
- Other Refs: Lester 19638, WAI 19638N, J&N 410-44064, Unipoint STR-6007
- Voltage: 12V
- Rotation: Clockwise (CW)
- Teeth: 9T (35mm pinion)
- Gear Outer Diameter: 1.417″ (36mm)
- Mounting Ear: 13mm (unthreaded)
- Unit Type: Hitachi OSGR
Key Features & Notes:
✅ High-Output: Delivers higher cranking power than the original OEM starter.
✅ Extended Length: 9mm longer than the standard OEM unit (verify clearance).
✅ Compatibility: Fits Thermo King SL series (SL100, SL200, SL300, SL400).
✅ Weight: 11.61 lbs (5.28 kg) – Robust construction for heavy-duty use.
Cross-Reference Part Numbers:
| Part Number | Manufacturer |
|---|---|
| 45-2177 | Thermo King |
| 45-2324 | Thermo King |
| 845-2177 | Thermo King |
| S13-407 / S13-407A | Hitachi |
| 19638 | Lester |
| 19638N | WAI |
| 410-44064 | J&N |
| STR-6007 | Unipoint |
| SHI0208 | Arrowhead |
Installation Tips:
- Verify Pinion Engagement: Ensure the 9T (35mm) pinion meshes correctly with the flywheel.
- Check Clearance: Due to the 9mm longer body, confirm no interference with adjacent components.
- B+ Terminal: Standard 12V connection (confirm cable reach).
Applications:
- Thermo King Transport Refrigeration Units:
- SL100, SL200, SL300, SL400
- Compatible with Hitachi-based systems (OSGR type).













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