SKU: 92782810447

Kohler 25 403 39-S 2540339-S 2540332-S 2540321 Regulator Rectifier 20-30Amp

Sale price$19.59 Regular price$21.77
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Ships within 48 hours · Estimated delivery Jul 20 - Jul 25

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Description

Kohler 25 403 39-S 2540339-S 2540332-S 2540321 Regulator Rectifier 20-30AmpFeatures: Direct replacement to your original unit. Plug and play, direct fit, easy installation. This latest rectifier regulator, has a ground lug and built in over voltage protection that is self resetting. The over voltage protection prevents possible damage to other electrical components if an engine is jump started. All products shipped are tested. Installation instruction is not included. Specifications: Condition: Aftermarket 100% Brand New

Features:
Direct replacement to your original unit.
Plug-and-play, direct fit, easy installation.
This latest rectifier-regulator, has a ground lug and built-in over-voltage protection that is self-resetting.
The over-voltage protection prevents possible damage to other electrical components if an engine is jump-started.
All products shipped are tested.
Installation instruction is not included.

Specifications:
Condition: Aftermarket 100% Brand New
Material: Aluminum
Quanity: 1 PC
Type: Regulator Rectifier
Power Source: Gas
Power Capability: 20 - 30 Amp
Terminals: AC - B+ - AC

Replacement Part Number:
2540308-S
2540320-S
2540321-S
2540329-S
2540332-S
2540339-S

Fitment:
Fit for Kohler CH18
Fit for Kohler CH20
Fit for Kohler CH740
Fit for Kohler CH640
Fit for Kohler CH620
Fit for Kohler CH750
Fit for Kohler CH980
Fit for Kohler CH1000
Fit for Kohler ECH630
Fit for Kohler ECH730
Fit for Kohler ECH740
Fit for Kohler ECV740

Package includes:
1x Regulator Rectifier

NOTICE:
Before installing your new regulator rectifier;

Check the AC output of the stator.
Replace any burned or corroded connectors on stator and regulator/rectifier
Check and repair any melted wiring.
Use hi-temp dielectric grease on all connectors.


Warranty:
Returns: Customers have the right to apply for a return within 60 days after the receipt of the product
24-Hour Expert Online: Solve your installation and product problems

Shipping Notes
  • Free Standard Shipping on $100+ Orders to the USA.
  • Except Preorder products are shipped in 48 hours.
  • Delivery to the USA:
  1. Standard Shipping : 3-10 business days
  • If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
  • We offer a 30-day return/exchange service after receiving.
  • Final sale items are not eligible for returns or exchanges.
  • To process your return/exchange, please contact us at [email protected]
  • Please click here for more details>>> Return & Exchange Policy
SKU: 92782810447

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4.3 ★★★★★
Based on 7 reviews
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Product Reviews
C
Verified Purchase
Coldax
Houston, US
★★★★★ 5
2021 Volvo XC 40 T5R
Works perfectly. Be sure to tighten down with the proper torque!
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on February 14, 2025
H
Verified Purchase
HEIDI
Belleville, US
★★★★★ 5
Fits Volvo xc90
Fits my Volvo xc90 2020
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on June 24, 2025
D
Verified Purchase
Destiny Voisine
New York, US
★★★★★ 5
It fit
BMW X1 2015. No problems at all. You won’t need any other cup unless you have more style euros.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on November 14, 2025
B
Verified Purchase
Brian Classen
Massapequa, US
★★★★★ 5
FRIENDLY REMINDER Don't overtighten the bolts
MUCH better than the cheap plastic OEM part, Just a reminder though, these thread into an aluminum block so be very careful to start them finger tight first, then evenly tighten both bolts to push the fitting into the chamber. If you don't, it will slightly misalign and you run the risk of stripping the threads. The one comes with the replacement o ring, and be sure to get some antifreeze on that seal prior to attempting to push it into the chamber. IT IS A TIGHT FIT, but that's what you want, so just be careful. You might also want an extra hose clamp on hand, as the one that came with this began to bend as it got tight, so I had to replace it for peace of mind. Overall, great product though.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on January 9, 2026
D
Verified Purchase
Dklnyc
Boise, US
★★★★★ 5
Strong product
Great quality
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on March 11, 2026

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