JD STX38 won’t start - Lawn Mower Forums : Lawnmower Reviews, Repair, Pricing and Discussion Forum
Small Engine Repair Discussion Talk about issues or tips you may have for others regarding small engine repairs.

 1Likes
  • 1 Post By Tom Mullins
 
LinkBack Thread Tools
post #1 of 5 (permalink) Old 07-06-2019, 07:31 PM Thread Starter
Junior Member
 
Join Date: Jul 2019
Posts: 3
Thanks: 0
Thanked 0 Times in 0 Posts
JD STX38 won’t start

I recently bought a John Deere STX38 black deck with a Kohler Command CV125S. The guy said it ran fine for the past three years he’s had it, but wouldn’t start this season. After about ten seconds of cranking with the choke on, the mower will briefly fire, but die within 2-3 seconds. I have replaced all fuel lines, fuel filter, fuel shut off valve, cleaned the tank and fuel cap vent, and and ignition module. I cleaned the carb, but have not rebuilt it. I tried resetting the carb adjustments, but it didn’t help anything. Other than this issue, the mower is in excellent condition. Thanks for any help!
Tom Mullins is offline  
Sponsored Links
Advertisement
 
post #2 of 5 (permalink) Old 07-07-2019, 01:40 PM
Senior Member
 
keakar's Avatar
 
Join Date: May 2016
Location: louisiana
Posts: 453
Thanks: 6
Thanked 15 Times in 15 Posts
first i recommend you replace the fuel line from tank to carb, if they ever used ethanol gas it could be swollen shut on the insides but if the mower is over 5 years old is a good idea to replace it no matter what as they dry out after 5 yrs

after that buy a new carb for it on ebay, they are only like $15, bolt it on and you are good to go

You can only learn if you ask the question, so there are no dumb questions.
keakar is offline  
The Following User Says Thank You to keakar For This Useful Post:
Ericjr16 (07-10-2019)
post #3 of 5 (permalink) Old 07-07-2019, 03:08 PM Thread Starter
Junior Member
 
Join Date: Jul 2019
Posts: 3
Thanks: 0
Thanked 0 Times in 0 Posts
I’ve already replaced everything from the fuel tank up to the carb. I know I’m getting spark, as it will fire with starting fluid. I guess I’ll get a new carb, and see what that does.
keakar likes this.
Tom Mullins is offline  
Sponsored Links
Advertisement
 
post #4 of 5 (permalink) Old 07-07-2019, 05:37 PM
Senior Member
 
keakar's Avatar
 
Join Date: May 2016
Location: louisiana
Posts: 453
Thanks: 6
Thanked 15 Times in 15 Posts
ya those carbs can be a PITA to get cleaned and a new carb is only like $5 more then buying a rebuild kit for them

buy a new one, bolt it on, and then you can relax and go drink a beer

i think this one fits yours https://www.ebay.com/itm/Carburetor-...MAAOSw89lcoct0

You can only learn if you ask the question, so there are no dumb questions.
keakar is offline  
post #5 of 5 (permalink) Old 07-09-2019, 10:23 PM
Senior Member
 
Join Date: Dec 2012
Posts: 692
Thanks: 19
Thanked 90 Times in 81 Posts
It's possible you do not have a fuel problem...You may have an engine that had a sudden "stop" and now has a slightly off time ignition with a partially sheered flywheel key...You may want to do a check..remove shroud, and flywheel nut..carefully inspect the key...If in doubt...put in a new one...and fully tighten the flywheel...Only other reason I can think of, is your choke butterfly is not fully closing...but based on the work you already did, I'm sure you checked that...Good Luck..
suspicionofignorance is offline  
Sponsored Links
Advertisement
 
Reply

Quick Reply
Message:
Options

Register Now



In order to be able to post messages on the Lawn Mower Forums : Lawnmower Reviews, Repair, Pricing and Discussion Forum forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.

User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.

Password:


Confirm Password:
Email Address
Please enter a valid email address for yourself.

Email Address:
OR

Log-in










Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page



Posting Rules  
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On

 
For the best viewing experience please update your browser to Google Chrome