Part-number relationships
| Relationship | Reference family | Number |
|---|---|---|
| Primary Cat Part Number | Official electric starting motor identity; original reference discontinued | 520-6650 |
| Same-number Formatting Variant | Search alias only | 5206650 |
Excavator Starter Motors
520-6650 24V 11T Starter Motor for Cat C9.3 C9.3B C13
5 product photos · Swipe on mobile, or hover and select a thumbnail.
OEM / reference520-6650
SpecificationStarter Motor
Catalog ID50546723
Cat identifies 520-6650 as a 24-volt electric starting motor with an 11-tooth pinion and clockwise rotation. The official compatible-model record lists C9.3, C9.3B and C13 industrial engines and marks the original Cat number discontinued. Five selected owned white-background photographs show the replacement starter from its drive, mounting, body and terminal sides. Confirm 520-6650, 24 V, 11 teeth, clockwise rotation, mounting geometry and engine serial range before ordering.
- Product Type
- Electric Starter Motor
- Voltage
- 24 V
- Pinion Teeth
- 11
- Rotation
- Clockwise
- Material
- Alloy aluminum
- Original Reference Status
- Discontinued by Cat; replacement verification required
Send the machine model, engine model or nameplate photo so our team can confirm compatibility before shipment.
Product fitment guide
Part numbers and compatible models
Quickly compare the reference number and recorded machine applications. Use the original photos and the checklist before ordering.
Part identification
Reference numbers
Primary number
Formatting alias
Formatting aliases are the same number written differently. Related assemblies and remanufactured numbers are not presented as direct interchanges.
Product summary
Starter Motor
- Category
- Excavator Starter Motors
- Catalog ID
- 50546723
- Photo views
- 5
Before ordering
Confirm these details
- Confirm voltage and power rating against the original starter nameplate.
- Compare mounting-hole pattern, flange position and overall body orientation.
- Confirm pinion tooth count and rotation where those values are specified.
- Verify the engine model and machine serial range before ordering.
Machine fitment
Compatible model references
2 model references
Compatibility lists identify searchable model families, not every production serial range. Confirm the original part number and machine serial number before purchase.
Quick fitment answers
Common questions about 520-6650
Which machines use 520-6650?
Recorded compatible model references include Official Cat industrial engines: C9.3 / C9.3B / C13, Fitment limitation: Confirm 520-6650, 24 V, 11-tooth pinion, clockwise rotation, mounting geometry and engine serial range before shipment. Confirm the complete part number and machine serial range before ordering.
What numbers are documented for 520-6650?
Formatting aliases for the same number: 5206650.
How do I confirm 520-6650 before ordering?
Confirm voltage and power rating against the original starter nameplate. Compare mounting-hole pattern, flange position and overall body orientation. Confirm pinion tooth count and rotation where those values are specified. Send clear photos of the original unit and connector layout when requesting a quote.