Excavator Starter Motors
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Heavy-duty Prestolite M128 starter identified by part number M128R3623SER. Prestolite's official cross-reference lists it as a direct replacement to M128R3823SER; the current marine catalog specifies 24V, 12.0kW, clockwise rotation, 11 teeth and SAE3 mounting for MTU MS7-502, MS7-506 and MS7-510 dual-starter applications. Four exact owned photographs show the same M128 construction. The former 11kW value is corrected to 12kW.
Send the machine model, engine model or nameplate photo so our team can confirm compatibility before shipment.
| Relationship | Reference family | Number |
|---|---|---|
| Primary Part Number | Prestolite M128 starter | M128R3623SER |
| Direct Replacement | Prestolite official cross-reference | M128R3823SER |
| Direct Replacement | Prestolite official cross-reference | M128723IR |
| MTU Reference | Official catalog application reference | X59417200009 |
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 MTU MS7 family: MS7-502 / MS7-502A / MS7-506 / MS7-506A / MS7-510 / MS7-510A, Fitment restriction: Dual-starter applications only, Fitment limitation: Confirm M128R3623SER, 24V, 12kW, 11T, SAE3 and engine installation. Confirm the complete part number and machine serial range before ordering.
Documented direct interchanges: M128R3823SER, M128723IR.
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.
