Alternators

EexcavaStart 129772-77200 12V 55A Alternator for Yanmar 3JH2E

Q: What numbers are documented for 129772-77200?

Primary Manufacturer Reference: 129772-77200. Search Format Alias: 12977277200. Cross-reference (fitment check required): 20025. Cross-reference (fitment check required): ALT107. Cross-reference (fitment check required): AHI0068. Cross-reference (fitment check required): 113793. Cross-reference (fitment check required): LR155-20. Cross-reference (fitment check required): LR155-20B. Cross-reference (fitment check required): 400-44025. Cross-reference (fitment check required): 400-44025R. Cross-reference (fitment check required): 12107. Cross-reference (fitment check required): 8M6007517. Relationship labels distinguish formatting aliases, direct interchanges, remanufactured references and related assemblies.

Q: How do I confirm 129772-77200 before ordering?

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

EexcavaStart packaging illustration · Not a photograph of this exact part. Exact-unit photo availability is not confirmed; send your original part number and unit photos with your inquiry.

OEM / reference129772-77200

Specification12V 55A alternator; original-unit verification required

Catalog ID929290006

Product Type: Alternator
Product Brand: EexcavaStart
Primary Reference: 129772-77200
Equipment Scope: Marine diesel engine
Voltage: 12 V
Rated Output: 55 A
Rotation: CW
B+ Terminal: M5 × 0.8
Terminal Arrangement: Insulated; light / ignition terminals
Pulley: Single V-groove
Regulator: Internal
Fan: External
Availability: Quote only; stock not confirmed
Image Disclosure: Brand packaging illustration; exact-unit photograph not confirmed

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

Quotation details: MOQ, availability, lead time, item condition (new or remanufactured) and warranty coverage must be confirmed in your quotation before ordering.

Part-number relationships

Relationship	Reference family	Number
Primary Manufacturer Reference	YANMAR	129772-77200
Search Format Alias	Formatting only	12977277200
Cross-reference (fitment check required)	API MARINE	20025
Cross-reference (fitment check required)	API MARINE	ALT107
Cross-reference (fitment check required)	ARROWHEAD	AHI0068
Cross-reference (fitment check required)	CARGO	113793
Cross-reference (fitment check required)	HITACHI	LR155-20
Cross-reference (fitment check required)	HITACHI	LR155-20B
Cross-reference (fitment check required)	J&N Electrical Products	400-44025
Cross-reference (fitment check required)	J&N Electrical Products	400-44025R
Cross-reference (fitment check required)	LESTER	12107
Cross-reference (fitment check required)	QUICKSILVER	8M6007517
Cross-reference (fitment check required)	WAI	12107N

Product fitment guide

Part numbers and compatible models

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

Part identification

Reference numbers

Primary number

129772-77200

Formatting alias

12977277200

Cross-reference (fitment check required)

20025
ALT107
AHI0068
113793
LR155-20
LR155-20B
400-44025
400-44025R
12107
8M6007517
12107N

Formatting aliases are the same number written differently. Cross-references require a specification and fitment check; they do not by themselves confirm direct interchangeability. Related assemblies and remanufactured numbers are separate relationship types.

Product summary

12V 55A alternator; original-unit verification required

Category: Alternators
Catalog ID: 929290006
Illustration views: 1

Before ordering

Confirm these details

Confirm voltage and rated amperage against the original alternator label.
Compare mounting ears, pulley type and pulley-groove count.
Check plug shape, terminal position and regulator connection.
Verify the engine model and machine serial range before ordering.

Machine fitment

Compatible model references

1 model reference

Yanmar 3JH2E marine diesel engine, 1991–1999: Catalog-listed; verify original number, electrical connections, pulley and mounting

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 129772-77200

Which machines use 129772-77200?

Recorded compatible model references include Yanmar 3JH2E marine diesel engine, 1991–1999: Catalog-listed; verify original number, electrical connections, pulley and mounting. Confirm the complete part number and machine serial range before ordering.

What numbers are documented for 129772-77200?

Cross-references are listed in the relationship table above. Compare specifications and the original unit before treating a reference as interchangeable. Formatting aliases for the same number: 12977277200.

How do I confirm 129772-77200 before ordering?

Confirm voltage and rated amperage against the original alternator label. Compare mounting ears, pulley type and pulley-groove count. Check plug shape, terminal position and regulator connection. Send clear photos of the original unit and connector layout when requesting a quote.