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SKU:
NLT2T02933
Ships for free in 2–4 business days.
Regulator Rectifier 25-403-23-S for Kohler CH640 CH735 ECH440 LH685 LH775 Engine
$158.29
In Stock
$158.29
Sale price
$158.29
Regular price
This is a replacement voltage regulator/rectifier for Kohler CH640, CH735, ECH440, LH685, LH775; replaces 25-403-23-S.
Estimated delivery between
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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
| Kohler CH640, CH735, ECH440, LH685, LH775 |
Product Overview
Overcharging, undercharging, repeated battery discharge or unstable DC system voltage can point to a failed regulator/rectifier after stator output and wiring are checked.
This replacement regulator/rectifier restores controlled battery charging on compatible Kohler engines. Match 25-403-23-S and connector configuration before installation.
Key Features & Performance
- Replacement voltage regulator/rectifier 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 25-403-23-S
Replaces / Cross-References
- 25-403-23-S
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 engine 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 engine model, mounting arrangement and electrical, fuel 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: voltage regulator/rectifier, Kohler CH640, CH735, ECH440, LH685, LH775, 25-403-23-S.