- Home Page /
- Patio, Lawn & Garden /
- Outdoor Power & Lawn Equipment /
- Replacement Parts & Accessories /
- Lawn Mower Parts & Accessories /
- Lawn Mower Replacement Parts /
- labwork Voltage Regulator Rectifier Replaceme...
0 ratings
Item #:
44729533
labwork Voltage Regulator Rectifier Replacement for John Deere 8-25HP Engines with 15 Amp Alternators Replacement for Kohler CH20 CH22 CH23 CH25
Item #:
44729533
FJD 51
Price Details
Excluding Shipping & Custom charges ( Shipping and custom charges will be calculated on checkout )
*All items will import from US
0 ratings
Write a review
In stock
Imported from USA store
QTY:
Order now and get it around Saturday, August 15
Secured transaction
Ubuy works hard to protect your security and privacy. Our advanced payment security system ensures confidentiality by encrypting your information during transmission using AES (Advanced Encryption Standards) and SSL (Secure Socket Layer) protocols. Your payment details are 100% secure as we do not share your payment details with third party sellers.
Our Top Logistics Partners
Voltage regulator rectifier replacement for John Deere 8-25HP Engines with 15Amp Alternators.
Fast
Shipping
Free
Return*
Secure Packaging
100% Original Products
PCI DSS Compliance
ISO 27001 Certified
Note: Step Down Voltage Transformer required for using electronics products of US store (110-120). Recommended power converters Buy Now.
What Stands Out
High Compatibility
Designed specifically for John Deere 8-25HP engines, ensuring seamless integration and optimal performance. Also compatible with Kohler CH engines, making it a versatile choice for various models.
Robust Performance
Delivers consistent 15 Amp output, effectively regulating voltage to prevent engine damage. This reliable performance enhances engine lifespan and reduces maintenance costs, making it a smart investment for users.
Easy Installation
Engineered for straightforward installation, saving time and effort. Users can quickly replace their old rectifier without specialized tools, ensuring a hassle-free upgrade to maintain engine efficiency.
Product Details
- Voltage regulator rectifier replacement for John Deere 8-25HP Engines with 15Amp Alternators
- Voltage regulator rectifier replacement for Kohler 4140309 4140309-S 4140310 4140310-S 2540303 2540303-S 2575503 2575503-S 4140301 4140303
- Replacement for John Deere part number: AM34738 AM106357 AM102596
- Has 3 Terminals: AC, B+, AC in a row. Replacement parts of Lawn Mower, Garden Tractor, Motorcycles, ATV, Chainsaws, etc
- Please compare your part with the pictures and make sure this is for your models before you purchase
Product Technical Details
| Manufacturer | labwork |
| Brand | labwork |
| Model | 4140309 |
| Item Weight | 2.89 ounces |
| Package Dimensions | 3.7 x 2.6 x 1.14 inches |
| Item model number | F8-018873 |
| Manufacturer Part Number | F8-018873 |
| OEM Part Number | 4140309 |
| Special Features | 150 |
| Voltage | 623 Volts |
Who Should Buy?
-
Small Engine Owners
Ideal for owners maintaining John Deere engines to ensure proper voltage regulation and battery charging.
-
DIY Mechanics
Great for DIY enthusiasts who want a reliable replacement part for troubleshooting charging issues in small engines.
-
Commercial Equipment Users
Suitable for businesses relying on John Deere machinery, needing dependable voltage regulation for operations.
-
High-Power Applications
Not suited for larger engines or applications requiring higher amperage beyond the 15 Amp rating.
Product Description
Have any Query? Chat with us
Customer Questions & Answers
-
Question:
What is the labwork Voltage Regulator Rectifier used for?
Answer: The labwork Voltage Regulator Rectifier is designed to regulate voltage and rectify current for John Deere 8-25HP engines equipped with 15 Amp alternators, as well as for Kohler CH20, CH22, CH23, and CH25 engines. This component is crucial to prevent overcharging and ensure the electrical system operates smoothly. It effectively manages power output, providing a stable operation that protects the engine and its electrical components from damage. -
Question:
How do I install the labwork Voltage Regulator Rectifier?
Answer: Installing the labwork Voltage Regulator Rectifier typically involves disconnecting the battery, locating the old regulator, and removing it. After that, connect the new regulator, ensuring to match the wiring as per the original configuration. Reconnect the battery and test your system. This upgrade is beneficial when experiencing issues with electrical performance, offering a straightforward solution to enhance engine reliability. -
Question:
What are the signs of a failing voltage regulator?
Answer: Common signs of a failing voltage regulator include flickering lights, difficulty starting the engine, or a dead battery. You may also notice an unusually high or low reading on your voltage meter. Addressing these symptoms promptly with a new regulator can prevent more serious electrical problems in your John Deere or Kohler engine, ensuring consistent performance during operation. -
Question:
Is the labwork Voltage Regulator Rectifier compatible with other engine brands?
Answer: The labwork Voltage Regulator Rectifier is specifically designed for John Deere engines with 15 Amp alternators and Kohler CH20, CH22, CH23, and CH25 models. While it may seem compatible with other brands, we recommend using it only with the specified models to ensure optimal performance. This targeted compatibility ensures that the voltage regulation meets the specific electrical demands of these engines. -
Question:
Can I use this rectifier for my lawn mower?
Answer: If your lawn mower is equipped with a John Deere engine or one of the specific Kohler models mentioned, then the labwork Voltage Regulator Rectifier can be utilized. This component effectively manages the electrical system in such engines, making it suitable for enhancing performance and reliability in lawn maintenance tasks. -
Question:
What materials are used in the construction of the voltage regulator rectifier?
Answer: The labwork Voltage Regulator Rectifier is constructed from high-quality materials that ensure durability and efficient performance. Typically, it includes robust semiconductor components and a heat sink designed to dissipate heat effectively, maintaining operational stability even under demanding conditions. This quality construction helps maintain consistent voltage levels, which is crucial for engine efficiency. -
Question:
What voltage output should I expect from this regulator?
Answer: The labwork Voltage Regulator Rectifier is designed to maintain a stable output voltage, generally around 12-14 volts, which is typical for 15 Amp alternators. This consistent output is essential for recharging the battery and powering electrical systems in your engine. Reliable voltage output prevents undercharging or overcharging, thus maximizing the lifespan of the battery and electrical components. -
Question:
How does a rectifier improve engine performance?
Answer: A rectifier improves engine performance by converting alternating current (AC) produced by the alternator into direct current (DC), which is used by the battery and electrical systems. This conversion ensures that power is delivered consistently without fluctuations, preventing failures in electrical components, and contributing to smoother engine operation. Upgrading to a new rectifier can restore lost power efficiency. -
Question:
Are there any maintenance steps for the voltage regulator?
Answer: Maintenance for the voltage regulator typically involves periodic checks of wiring connections and visual inspections for any signs of wear or damage. Ensuring that the mounting is secure and clean from debris can also enhance its operational efficiency. Regular monitoring can help identify any potential issues early, ensuring continuous, trouble-free performance of your engine. -
Question:
Where can I buy labwork Voltage Regulator Rectifier Replacement for John Deere and Kohler engines?
Answer: You can buy the labwork Voltage Regulator Rectifier Replacement for John Deere 8-25HP engines and Kohler CH20, CH22, CH23, CH25 on Ubuy. Ubuy provides a reliable platform for purchasing high-quality replacement parts, ensuring you can find exactly what you need for maintaining your engine's performance.
labwork Lawn Mower Replacement Parts F8-018873 Editorial Review
The labwork Voltage Regulator Rectifier Replacement is a great product that users can count on to replace John Deere Kohler 8-25 HP Engines with 15 Amp Alternators. It is also a great replacement for Kohler CH20 CH22 CH23 CH25 41-403-09 4140309. This voltage regulator rectifier replacement provides excellent performance and is easy to install, allowing you to charge your riding lawn mower in no time.
Customer Reviews & Ratings
81 customers ratings
-
5 Star
81%
-
4 Star
6%
-
3 Star
9%
-
2 Star
0%
-
1 Star
4%
Review this product
Share your thoughts with other customers
Pros
- Perfect fit for John Deere Kohler 8-25 HP Engines with 15 Amp Alternators.
- Easy to install.
- Provides excellent performance.
Cons
- No negative feedback provided.
Platform Trust & Buyer Confidence
MA
Mohammad
Verified buyer
“Excellent quality and original too,when ubuy send original things I will appreciate that ,I very satisfied thank you”
23 July 2026 · via Trustpilot
CK
Chitra
Verified buyer
“The order and delivery progress was communicated very well. Package arrived within the estimated time. Products arrived as expected in good condition.”
22-Jul-26 · via Trustpilot
K
kund
Verified buyer
“Good supply of products. Safe payment methods, and shipment worldwide! Genuine products.”
23-Jul-26 · via Trustpilot
OO
Onesi
Verified buyer
“Was my first time buying a product from Ubuy, but I found it so helpful. This is reliable. Gonna place a new order!”
22 July 2026 · via Trustpilot
SJ
SAO JOHN
Verified buyer
“Ubuy is a great online platform to buy stuff. Reliable, fast delivery time and great value for money. I've been using Ubuy online shopping platform for three years now and will continue to do so.”
23 July 2026 · via Trustpilot
Secure Checkout
Global Delivery
Easy Returns
Genuine Products
Product Price History
Important information
- Limitations : For products shipped internationally, please note that any manufacturer warranty may not be valid; manufacturer service options may not be available; product manuals, instructions, and safety warnings may not be in destination country languages; the products (and accompanying materials) may not be designed in accordance with destination country standards, specifications, and labeling requirements; and the products may not conform to destination country voltage and other electrical standards (requiring use of an adapter or converter if appropriate). The recipient is responsible for assuring that the product can be lawfully imported to the destination country. When ordering from Ubuy or its affiliates, the recipient is the importer of record and must comply with all laws and regulations of the destination country.
- Not all the products listed on Ubuy are for sale, as Ubuy is a global search engine. Products are subject to export/trade regulations.
FJD 51
Order now and get it around Saturday, August 15
This item is not restrict in my country.(Please click on above link if this item is not restrict in your country, So our team will review and allow.)
QTY:
Secured transaction
PCI DSS compliant and ISO 27001:2022 certified, with encrypted payments and full buyer protection on every order.
Our Top Logistics Partners
Fastest cross-border delivery
Features & Benefits
- Compatible with John Deere 8-25HP Engines.
- Designed for 15 Amp alternators.
- Replaces multiple Kohler part numbers.
- Features 3 terminals: AC, B+, AC.
- Ideal for lawn mowers and garden tractors.
- Ensure compatibility by comparing with provided images.
Ubuy Assurance
Experience worry-free shopping with 100% original products, PCI DSS-compliant payment security, ISO 27001-certified data protection, the fastest cross-border delivery, free returns *, and secure packaging on every order.