Excavator Starter Motors
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12V, 9-tooth starter motor identified by Yanmar reference 129953-77019. Yanmar 4TNV98 parts catalogs list this starter assembly, and independent replacement catalogs support the electrical and pinion configuration. Five exact owned photographs show one consistent unit. Power is omitted because published replacement catalogs differ between 3.0 and 3.2kW.
Send the machine model, engine model or nameplate photo so our team can confirm compatibility before shipment.
| Relationship | Reference family | Number |
|---|---|---|
| Primary Part Number | Yanmar starter assembly reference | 129953-77019 |
| Formatted Alias | Same number without separators; not an interchange | 12995377019 |
| Equipment-Prefixed Alias | Komatsu/Yanmar catalog formatting; not a new interchange | YM129953-77019 |
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
3 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 catalog: 4TNV98-YTBL1 / 4TNV98-YTBL2, Additional exact-number record: 4TNV98-VTBZ, Fitment limitation: Confirm 129953-77019, 12V, 9 teeth, flange and engine serial. Confirm the complete part number and machine serial range before ordering.
Formatting aliases for the same number: 12995377019, YM129953-77019.
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.
