Skip to product information
SKU:
NLT2T01130
Ships for free in 2–4 business days.
12V Starter 129136-77011 129400-77012 For Yanmar 4TN78 4TN82 Komatsu PC35 PC50
$284.39
In Stock
$284.39
Sale price
$284.39
Regular price
This is a replacement starter motor for Yanmar Engines: 4TN78, 4TN82; replaces 129136-77011, 129400-77012.
Estimated delivery between
Let Northline Parts Do the Heavy Lifting for You!
Not sure which part you need? Our team can help you find the right replacement.
Parts Support Hours: Monday–Friday, 8:00 AM–5:00 PM CT
Live Chat: Available 24/7
I reached out for some replacement head bolts and they responded quickly with a few questions and cautionary information and is sending me some bolts. Great customer service! Thanks
Edward H. — Verified customer
Compatible Models
We do our best to list all compatible models. Although this may be the part you need, your exact model may not appear below.
Compatible equipment / model
| Yanmar Engines: 4TN78, 4TN82 |
| Komatsu Excavators: PC35, PC50 |
Product Overview
A strong battery with a click, slow cranking, intermittent no-crank condition or a starter that spins without engaging can indicate starter wear after cables, grounds and the control circuit are checked.
This replacement starter restores cranking by engaging the flywheel and turning the engine. Match voltage, rotation, tooth count, mounting and original reference before installation.
Key Features & Performance
- Replacement starter motor for the listed application
- Intended to restore the original function when diagnosis or inspection confirms the existing part is worn, damaged or failed
- Match the original part number, mounting and connections before installation
- Replaces or cross-references 129136-77011, 129400-77012
Replaces / Cross-References
- 129136-77011
- 129400-77012
What Is Included
1 replacement component for this SKU unless the product images or option selection state otherwise.
Fitment Notes
Match the original part number, machine or vehicle model, mounting points, connector or hose/fitting style, and any serial-number restrictions before ordering. When a manufacturer uses multiple revisions within the same model family, the equipment serial number and original component should be the final fitment check.
Frequently Asked Questions
Is this a genuine OEM part?
No, unless the product page specifically states otherwise. This listing is for a replacement, accessory, upgrade or repair component as described above. OE and interchange numbers are provided for identification and fitment reference.
How should I verify fitment before ordering?
Compare the original part number, machine or vehicle model, mounting arrangement and electrical, fuel, coolant or hydraulic connections with the information above. For equipment parts, also verify the machine serial number whenever the manufacturer catalog uses serial breaks.
Part Summary
Keywords: starter motor, Yanmar Engines: 4TN78, 4TN82, Komatsu Excavators: PC35, PC50, 129136-77011, 129400-77012.