Excavator Starter Motors
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1109421 is a Delco starter reference in the official WAI 4211N replacement family. WAI specifies a new 12-volt, 1.5 kW, clockwise, 10-tooth Delco 10MT direct-drive starter. Published applications include John Deere 1020, 1520, 2510, 2520, 300, 301, 302 and 310 gas-engine equipment. Confirm the complete number, 12V/1.5kW rating, 10-tooth pinion, nose housing, terminals and machine engine before ordering.
Send the machine model, engine model or nameplate photo so our team can confirm compatibility before shipment.
| Relationship | Reference family | Number |
|---|---|---|
| Primary Delco Part Number | Official WAI replacement-reference entry | 1109421 |
| Delco Manufacturer Reference Family | Cataloged manufacturer references | 1107339 / 1108319 / 1109576 / 12301485 |
| John Deere Equipment Reference Family | Cataloged equipment references | AR91813 / AT18025 / SE501429 / SE501436 / TY1465 / TY26037 / TY6639 / TY6706 |
| Aftermarket Catalog Number | Official WAI product record | WAI 4211N |
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 John Deere Tractors and Equipment: 1020 / 1520 / 2510 / 2520 / 300 / 301 / 302 / 310, Published Fuel Type: Gasoline or LPG depending on model, Fitment Limitation: Confirm 1109421, 12V/1.5kW label, 10-tooth pinion, nose housing, terminals and engine type. Confirm the complete part number and machine serial range before ordering.
Manufacturer number: 1107339 / 1108319 / 1109576 / 12301485.
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.
