Medium
1-2 hours
This replacement 12V solenoid is an authentic item that is commonly utilized on riding lawn mower and tractors. The purpose of this part is to engage and route the electric current from the battery to the starter when the ignition switch is turned to the start position. Please note this solenoid is sold individually and it will require a screwdriver set to complete this repair.
Solenoid 725-04439B
OEM part for: Bolens, Yard Machines, MTD
Part Number: 725-04439B
$40.43
In Stock
Ships within 1 business day 
Jump To:
Frequently Purchased Together ?
Compatibility
This Solenoid will fit the following 1586 machines. Confirm this part works with your model, and view the detailed model diagrams and repair help we have to offer.
Displaying 20 of 1586 matching models.
1586 total model matches. Try the above search to narrow your results.
This is the official OEM part for the following brands:
- Bolens
- Craftsman
- Cub Cadet
- Husky
- MTD
- Troy-Bilt
- Yard Machines
- Yard Man
This item works with the following types of products:
- Lawn Mower
- Lawn Tractor
This part replaces obsolete part #: 725-04439A, 72504439, 725-04439
Customer Part Reviews ?
Average Rating (out of 5):
Click to filter by ratings:
5 stars
5
4 stars
0
3 stars
0
2 stars
0
1 stars
0
< PREV
- 1
Thanks
Works fine Now!!!
Guest -
October 12, 2021
Verified Purchase
Worked great
This solenoid was a newer upgrade to the original one mounted on the mower I had. It hooked up and performed as needed. The only difference visibly was the lower switch wire connector pins were parallel with the housing instead of angled.
Guest -
October 6, 2021
Verified Purchase
Will do business with again
Fast delivery great products
Guest -
June 19, 2020
Verified Purchase
Great part fast shipping
It was a quick repair and exact fit shipping was quick
Frank -
July 29, 2019
Verified Purchase
Exact part
Simple. Got the part, put it on, mower started right up. The right results.
Thanks
Guest -
July 4, 2019
Verified Purchase
Questions & Answers ?
Our customer Service team is at the ready daily to answer your part and product questions.
Ask our Team
We have a dedicated staff with decades of collective experience in helping customers just like you purchase parts to repair their products.
Does this fit my product?Questions & Answers for Solenoid
Battery well charged. Turn key, hear 'click' from under seat. No power to starter. Do I have a bad solenoid?
JW
for model number 13WN77KS011
asked on 2023-03-27
Hi JW, Thank you for writing. This is normally an indication the Solenoid is faulty and may need to be replaced. We also suggest testing the Solenoid with a Multimeter to check continuity. We hope this helps!
eReplacementParts Team March 27, 2023
Customer Repair Instructions ?
All our customer repair instructions are solicited directly from other customers just like you who have purchased and replaced this exact part.
Solenoid was starting to fail causing difficulty in starting.
KURT - August 1, 2016
👍 41 of 42 people found this instruction helpful
Tool Type
Lawn Tractor
Difficulty
Hard
Time
30-60 minutes
Tools Used
Screwdriver, Socket set, Adjustable Wrench
Parts Used
You have to remove the battery from under the seat and loosen 2 nuts. 4 wires must also be removed. The issue with this repair is the poor design by manufacturer in hiding this solenoid. All of the loosening and fastening must be done by touch. I also had to loosen a portion of the frame as the part would not come out or go in due to wire harness issues and clearance issues.
Did you find this story helpful?
Thanks for voting and helping fellow customers!
Lawntractor did not start
Kevin - June 17, 2016
👍 28 of 28 people found this instruction helpful
Tool Type
Lawn Tractor
Difficulty
Medium
Time
More than 2 hours
Tools Used
Screwdriver, Pliers, Socket set, Wrench Set, Nutdriver
Parts Used
Removed battery and everything covering solenoid. Took wiring off solenoid and removed solenoid. Installed new one placing wires back like original. Put battery in, hooked it up, tested if new one worked. Worked great. Unhooked battery and reassembled what was removed. Had a few breaks while working on it, took longer than expected
Did you find this story helpful?
Thanks for voting and helping fellow customers!
Starter solinoid out
chuck - April 2, 2017
👍 17 of 17 people found this instruction helpful
Tool Type
Lawn Tractor
Difficulty
Hard
Time
More than 2 hours
Tools Used
Screwdriver, Socket set, Wrench Set
Parts Used
Due to Troy Bilt design, the starter solenoid is located in a very difficult place to access. Under the seat below the battery compartment and to the side. No easy access. Must take body cowling loose to reach. Must access through the battery compartment hole. Many screws are hidden when removing body cowling. Terrible design, It took less than 5 minutes to replace solenoid, but about 3 hours to gain access and re-assemble. This one would have been easier to take to shop than try to repair at home. Very poor design by Troy Bilt, Solinoid should have been mounted next to starter or under the hood.
Did you find this story helpful?
Thanks for voting and helping fellow customers!
Starter Solenoid went out on a 2007 Bolens Model F765 w. 38" deck
Rebecca - September 10, 2016
👍 11 of 12 people found this instruction helpful
Tool Type
Lawn Mower
Difficulty
Medium
Time
1-2 hours
Tools Used
Screwdriver, Pliers, Socket set, Wrench Set, None
Parts Used
1. Removed battery to get at the solenoid which is stuffed in under the left rear fender. Time: About 2 minutes.
2. Removed the two screws holding the solenoid bracket and wrestled the solenoid out from under the fender. This and getting it back in was the hardest part of the repair, because there is literally no room to work. Removed wires (4) from old solenoid.
Reassembled wires to new part. Time: 17 minutes
3. Spent 1.25 hours trying to get mounting bracket back over the fender. (bracket goes outside, solenoid inside.)
4. Reinstalled battery, hit the key and away she went.
2. Removed the two screws holding the solenoid bracket and wrestled the solenoid out from under the fender. This and getting it back in was the hardest part of the repair, because there is literally no room to work. Removed wires (4) from old solenoid.
Reassembled wires to new part. Time: 17 minutes
3. Spent 1.25 hours trying to get mounting bracket back over the fender. (bracket goes outside, solenoid inside.)
4. Reinstalled battery, hit the key and away she went.
Did you find this story helpful?
Thanks for voting and helping fellow customers!
Lawn mower wouldn't start
Anita - May 29, 2017
👍 4 of 4 people found this instruction helpful
Tool Type
Lawn Mower
Difficulty
Medium
Time
30-60 minutes
Tools Used
Screwdriver, Socket set, Wrench Set, My cell phone so I could Google how to replace my solinoid
Parts Used
1. Disconnected and removed the battery
2. Located the starter solenoid removed bolts holding solenoid on the mower
3. Removed and disconnected all the wires on the solenoid
4. Reattached wires to new solenoid
5. Reattached solenoid to the mower frame
6. Replaced and reconnected old battery (tried new battery, no power No charge on it)
7. Started mower right up with old battery
2. Located the starter solenoid removed bolts holding solenoid on the mower
3. Removed and disconnected all the wires on the solenoid
4. Reattached wires to new solenoid
5. Reattached solenoid to the mower frame
6. Replaced and reconnected old battery (tried new battery, no power No charge on it)
7. Started mower right up with old battery
Did you find this story helpful?
Thanks for voting and helping fellow customers!
Starter would not completely disengage from ring gear due to bad solinoid, starter was damaged due to interference.
Scott - September 12, 2016
👍 5 of 7 people found this instruction helpful
Tool Type
Lawn Tractor
Difficulty
Medium
Time
More than 2 hours
Tools Used
Screwdriver, Socket set, Wrench Set
Parts Used
Troy-Built Mustang 50" ZTR MOWER / TRACTOR
1. Disconnected & Removed battery to make room to get to solenoid. ...about 10 mins
2 Removed engine cover & starter ..about 20 mins
3 Disconnected & Removed solenoid, this is difficult due to location that is under the seat mount 1+ hour, lots of metric socket adapters and extensions needed. You must do it by "feel" since everything is a blind removal. Very bad design for solenoid location.
4 reassembled with new parts and tightened all down, 45 mins
I suggest you take pics of all solenoid connections before disconnecting.
1. Disconnected & Removed battery to make room to get to solenoid. ...about 10 mins
2 Removed engine cover & starter ..about 20 mins
3 Disconnected & Removed solenoid, this is difficult due to location that is under the seat mount 1+ hour, lots of metric socket adapters and extensions needed. You must do it by "feel" since everything is a blind removal. Very bad design for solenoid location.
4 reassembled with new parts and tightened all down, 45 mins
I suggest you take pics of all solenoid connections before disconnecting.
Did you find this story helpful?
Thanks for voting and helping fellow customers!
Lawnmower wouldn't start with out jumping across solenoid
Alan - June 8, 2018
👍 2 of 2 people found this instruction helpful
Tool Type
Lawn Tractor
Difficulty
Easy
Time
Less than 15 minutes
Tools Used
Socket set, Wrench Set
Parts Used
1.Disconnect battery.
2. Disconnect leads to the solenoid. (Take a picture of the solenoid to make sure you put the right wires back on new one)
3.Undo bolts holding solenoid.
4. Install new solenoid and reverse the procedure.
5. Start mower.
2. Disconnect leads to the solenoid. (Take a picture of the solenoid to make sure you put the right wires back on new one)
3.Undo bolts holding solenoid.
4. Install new solenoid and reverse the procedure.
5. Start mower.
Did you find this story helpful?
Thanks for voting and helping fellow customers!
Starter would not engage
Marion - January 22, 2018
👍 2 of 2 people found this instruction helpful
Tool Type
Lawn Mower
Difficulty
Medium
Time
1-2 hours
Tools Used
Screwdriver, Socket set, Wrench Set
Parts Used
1. Remove battery
2. Red wire from battery goes to solenoid
3. Remove wires from old solenoid and attach to new, one at a time
4. Secure to frame
5. Install battery, red wire ( positive ) first, then black wire ( to negative )
2. Red wire from battery goes to solenoid
3. Remove wires from old solenoid and attach to new, one at a time
4. Secure to frame
5. Install battery, red wire ( positive ) first, then black wire ( to negative )
Did you find this story helpful?
Thanks for voting and helping fellow customers!
Turn key and nothing
Robert - January 14, 2024
Tool Type
Lawn Tractor
Difficulty
Medium
Time
1-2 hours
Tools Used
Screwdriver, Pliers, Socket set, Wrench Set, Jack
Parts Used
Replaced part from under mower
Did you find this story helpful?
Thanks for voting and helping fellow customers!
would not start due to bad selenoid
Harry - November 26, 2020
Tool Type
Lawn Tractor
Difficulty
Hard
Time
30-60 minutes
Tools Used
Socket set
Parts Used
removed old solenoid and installed new one. the solenoid is in a very hard place to get to
Did you find this story helpful?
Thanks for voting and helping fellow customers!
Load More Install Stories
OEM stands for Original Equipment Manufacturer and means the part you’re buying is sourced directly from the manufacturer who made your product. At eReplacementParts, we sell only genuine OEM parts, guaranteeing the part you’re purchasing is of better design and of higher quality than aftermarket parts.
Learn MoreOur product descriptions are a combination of data sourced directly from the manufacturers who made your product as well as content researched and curated by our content & customer service teams. This content is edited and reviewed internally before being made public to customers.
Our customer service team are at the ready daily to answer your part and product questions. We have a dedicated staff with decades of collective experience in helping customers just like you purchase parts to repair their products.
All our part reviews are solicited directly from other customers who have purchased this exact part. While we moderate these reviews for profanity, offensive language or personally identifiable information, these reviews are posted exactly as submitted and no alterations are made by our team.
All our customer repair instructions are solicited directly from other customers just like you who have purchased and replaced this exact part. While we moderate these reviews for profanity, offensive language or personally identifiable information, these reviews are posted exactly as submitted and no alterations are made by our team.
Based on data from past customer purchasing behaviors, these parts are most commonly purchased together along with the part you are viewing. These parts may be necessary or helpful to replace to complete your current repair.
All our installation videos are created and produced in collaboration with our in-house repair technician, Mark Sodja, who has helped millions of eReplacementParts customers over the last 13 years repair their products. Mark has years of experience in selling and repairing both commercial and residential products with a specialty in gas-powered equipment.
This data is collected from customers who submitted a repair instruction after replacing this exact part. Customers can rate how easy the repair was to complete and how long it took. We aggregate this data to provide a repair rating that allows customers to quickly determine the difficulty and time needed to perform their own repair.
