Excavator Starter Motors
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Prestolite M128 starter identified by part number M128R3603SE. The manufacturer's current marine catalog and product record link it to M128R3803SE and specify a 24V, 12.0kW, 11-tooth, clockwise, SAE3 configuration for MTU MS7-506 and MS7-510 single-starter applications. Four exact owned physical views show the same M128 construction. The former M128R3823SER co-listing belongs to a different dual-starter family and is not presented as an interchange.
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 | M128R3603SE |
| Direct Replacement | Prestolite official cross-reference | M128R3803SE |
| Sales Part Number | Prestolite official record | M128703 |
| Rejected Source Co-Listing | Different dual-starter family | M128R3823SER |
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 MTU starter family: MS7-506 / MS7-506A / MS7-510 / MS7-510A, MTU references: X52417200004 / X52417200011, Fitment restriction: Single-starter applications only, Fitment limitation: Confirm M128R3603SE, 24V, 12kW, 11T, SAE3 and installation position. Confirm the complete part number and machine serial range before ordering.
Documented direct interchanges: M128R3803SE.
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.
