Excavator Starter Motors

128000-8090 Starter Motor 12V 8-Tooth for Honda H4518

Q: What numbers are documented for 128000-8090?

Primary Part Number: 128000-8090. Manufacturer / OEM Reference: 31210-ZG8-003. Catalog Cross-Reference: 19880N. Additional Source Reference - Verify Configuration: 1991-1999. Additional Source Reference - Verify Configuration: H4518. Relationship labels distinguish formatting aliases, direct interchanges, remanufactured references and related assemblies.

Q: How do I confirm 128000-8090 before ordering?

Match the complete part number, compare the connector or mounting arrangement with the product photos, and confirm the machine or engine model and serial range. Send clear photos of the original unit when requesting a quote.

Brand illustration · Exact product photo available on request.

OEM / reference128000-8090

Specification12V Starter Motor

Catalog ID91003216

Starter motor identified by primary reference 128000-8090. The exact-reference catalog records design PMDD, voltage 12V, pinion teeth 8. Recorded application: Honda H4518 1991-1998; Engine GX640 18HP. Confirm the complete number, mounting, terminals, rotation and pinion teeth against the original starter before ordering. The displayed EexcavaStart package is a catalog illustration, not a photograph of the supplied product.

Product Type: Starter Motor
Design: PMDD
Voltage: 12V
Pinion Teeth: 8
Condition: New replacement part
Gallery Representation: EexcavaStart neutral packaging illustration; exact product photo available on request

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Send the machine model, engine model or nameplate photo so our team can confirm compatibility before shipment.

Part-number relationships

Relationship	Reference family	Number
Primary Part Number	Primary identity used for this catalog page	128000-8090
Manufacturer / OEM Reference	Listed under Honda	31210-ZG8-003
Catalog Cross-Reference	Exact-reference catalog number	19880N
Additional Source Reference - Verify Configuration	Retained from the supplied catalog; compare the original unit	1991-1999
Additional Source Reference - Verify Configuration	Retained from the supplied catalog; compare the original unit	H4518

Product fitment guide

Part numbers and compatible models

Quickly compare the reference number and recorded machine applications. Use the original photos and the checklist before ordering.

Part identification

Reference numbers

Primary number

128000-8090

Manufacturer number

31210-ZG8-003

Other documented relationship

19880N
1991-1999
H4518

Formatting aliases are the same number written differently. Related assemblies and remanufactured numbers are not presented as direct interchanges.

Product summary

12V Starter Motor

Category: Excavator Starter Motors
Catalog ID: 91003216
Photo views: 1

Before ordering

Confirm these details

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.
Verify the engine model and machine serial range before ordering.

Machine fitment

Compatible model references

5 model references

Honda H4518: 1991-1998; Engine GX640 18HP
Honda H5518: 1991-1999; Engine GX640 18HP
Honda Honda GX640: 1991-1999
Catalog coverage: Honda (1991-1999)
Fitment limitation: Confirm the exact number, nameplate, mounting, terminal layout, rotation and pinion teeth against the original starter before shipment

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

Common questions about 128000-8090

Which machines use 128000-8090?

Recorded compatible model references include Honda H4518: 1991-1998; Engine GX640 18HP, Honda H5518: 1991-1999; Engine GX640 18HP, Honda Honda GX640: 1991-1999, Catalog coverage: Honda (1991-1999), Fitment limitation: Confirm the exact number, nameplate, mounting, terminal layout, rotation and pinion teeth against the original starter before shipment. Confirm the complete part number and machine serial range before ordering.

What numbers are documented for 128000-8090?

Manufacturer number: 31210-ZG8-003.

How do I confirm 128000-8090 before ordering?

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.