Excavator Starter Motors
Brand illustration · Exact product photo available on request.
128170-77010D is cataloged as a starter motor with design PMGR, voltage 12V, power 1.0kW, pinion teeth 9, rotation CW. Exact application data includes Yanmar 1GM (1980-1984; Engine 1cyl, 19.41ci, 0.318L Diesel), with catalog coverage for Yanmar (1980-1990). Confirm the complete part number, voltage, mounting, terminal layout, rotation and pinion configuration against the original unit before shipment. The displayed EexcavaStart package is a catalog illustration, not a photograph of the supplied product.
Send the machine model, engine model or nameplate photo so our team can confirm compatibility before shipment.
| Relationship | Reference family | Number |
|---|---|---|
| Primary Part Number | Primary identity used for this catalog page | 128170-77010D |
| Manufacturer / OEM Reference | Listed under Hitachi | S114-303 |
| Manufacturer / OEM Reference | Listed under the exact-reference catalog | S114-303A |
| Manufacturer / OEM Reference | Listed under Mercury Marine | 8M6007438 |
| Manufacturer / OEM Reference | Listed under Yanmar | 128170-77010 |
| Catalog Cross-Reference | Exact-reference catalog number | 18209N |
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
15 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 1GM: 1980-1984; Engine 1cyl, 19.41ci, 0.318L Diesel, Yanmar 1GM: 1981-1989, Yanmar 1GM10: 1982-1990; Engine 1cyl, 19.41ci, 0.318L Diesel, Yanmar 1GM10C: 1982-1984; Engine 1cyl, 19.41ci, 0.318L Diesel, Yanmar 2GM: 1980-1984; Engine 2cyl Diesel, Yanmar 2GM: 1981-1989, Yanmar 2GM20: 1982-1990; Engine 2cyl, 38.81ci, 0.636L Diesel, Yanmar 2GMF: 1980-1984; Engine 2cyl Diesel and 7 additional models shown on this page. Confirm the complete part number and machine serial range before ordering.
Manufacturer number: S114-303, S114-303A, 8M6007438, 128170-77010.
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.
