Excavator Starter Motors
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Yanmar 12V, 3.0kW, 9-tooth clockwise starter assembly 129940-77011 for 4TNV98 engine families. Official Yanmar parts information identifies 129940-77010 as the old part number, while manufacturer parts catalogs list 129940-77011 for 4TNV98T variants. Five exact owned photographs show one matching two-hole flange unit. The recovered S14-102B label is not promoted because no reliable catalog relationship was found.
Send the machine model, engine model or nameplate photo so our team can confirm compatibility before shipment.
| Relationship | Reference family | Number |
|---|---|---|
| Primary Part Number | Current Yanmar starter assembly number | 129940-77011 |
| Superseded Part Number | Official Yanmar old part number | 129940-77010 |
| Formatted Alias | Same current number without separators; not an interchange | 12994077011 |
| Rejected Legacy Reference | No reliable exact relationship found | S14-102B |
Product fitment guide
Quickly compare the reference number and recorded machine applications. Use the original photos and the checklist before ordering.
Part identification
Formatting aliases are the same number written differently. Related assemblies and remanufactured numbers are not presented as direct interchanges.
Product summary
Before ordering
Machine fitment
4 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
Recorded compatible model references include Yanmar engine family: 4TNV98 / 4TNV98C / 4TNV98T, Documented variants: 4TNV98C-NYEM / 4TNV98T-ZXWTB / 4TNV98T-ZXWTB2, Additional exact-number application: 4TNV94L-ZWHB, Fitment limitation: Confirm current or superseded number, 12V, 9 teeth, two-hole flange and engine serial. Confirm the complete part number and machine serial range before ordering.
Formatting aliases for the same number: 12994077011.
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.
