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Hello my stx38 john deere 5-speed model cv13s lawn mower is having problems with getting the blades to engage I pull the nob but it will not connect any suggestions spec. # 21509 displ cc 398 serial 2516718532 there is nothing stopping it from moving checked wires did not find any problems showing was working great then it died the next time I tried it

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6ya6ya
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Posted on Jan 02, 2017

  • 246 Answers

SOURCE: I have a John Deere Riding lawn mower which starts

Hello roobar2009:

>>From your Description it Sounds like a Carburetor Problem, a Bad Fuel Filter or Bad Gas.
>>If you have Changed the Filter and the Gas and the Problem is Still happening, then
>>The Following is a Simple Way to make Sure the Engine is Getting Gas from the Carburetor to Run.
>>If the Engine Starts and Quits, then Check the Carburetor Solenoid.
>>If the Carburetor Solenoid is Good or has been Removed and the Engine will Start and Quit when the Gas is Poured into the Carburetor Throat, then Soak and Clean the Carburetor.
>>The Following is a Basic File I Made for Cleaning Carburetors. Any Input is Appreciated. Even though the Carburetor Looks Clean, the Internal Passages May be Restricted with Varnish that Gas Causes to Build Up over Time.
>>Spray Cleaners Remove this Varnish in Layers, so Soaking is the Only Sure Way to Remove ALL this Varnish.
>>I have Found that Most People can Use a Breakdown/IPL and Disassemble the Carburetor Enough for Proper Cleaning.
>>You Only have to Remove the Bowl (if Applicable), Float Pin (if Applicable), Float (if Applicable), Needle Valve.
Remove Any Adjustment Screws that Go Into the Carburetor Body. The Welch Plugs Do Not have to be Removed.
>>If you are Able to Remove and Disassemble the Carburetor and Keep the Gaskets Intact, then Usually these Gaskets can be Reused. The Only Parts you May Need to Replace is the Needle Valve.
>>The Float Needle Usually is Not Replaced Unless it is Not Operating Properly (the gas flow not shutting off and the carburetor is Flooding). Do Not Remove the Main Nozzle. This is a Pressed Fit and Removal is Not Required for Cleaning. Soaking and Blowing the Carburetor Out After Soaking will Clean the Nozzle.
>>Once Disassembled, then Soak the Carburetor Body and Parts in a 1 Gallon Can of Gunk Carburetor Cleaner Overnight. The Can has a Parts Tray Inside it for the Small Parts.
>>Once the Carburetor and Parts are in the Cleaner, you can Replace the Lid for Safety and to Prevent Accidental Spillage. Then Blow Out the Passages with Compressed Air.
>>***(Do Not Use High Pressure Air for the Zama Carburetors, they have Check Valves for the Primer and these are Usually Blown Out of the Carburetor if Not Careful. Allow the Zama Carburetor to Set on a Drip Pan and Dry)***.
>>****All the Carburetor Adjustments are the Same for Lawn Mower and Trimmers. There are Several Location for the Air Mixture Screws. The Idle Air Mixture Screws are Usually Located at the Top of the Carburetor Bowl and the Top of the Carburetor Body.****
>>If the Main Air and Idle Air Mixture Screws are Side by Side on the Side of the Carburetor, then the Idle Air is Nearest the Engine. The Main Jet Air Mixture Screw is Located in the Bottom of the Carburetor Bowl or Beside the Idle Air Screw on the Side of the Carburetor Body.
>>Some of the Older Model Carburetors have the Main Jet Mixture Screw Straight in from the Top of the Carburetor Body (this is Rare anymore). If you have Cleaned the Carburetor (Disassembled and Soaked Overnight in Carburetor Cleaner (I Use Gunk). Then Blow Out the Passages with Compressed Air and Install a New Kit if Required. Now Setting the Air Mixture Screws:
>>****Turn the Idle Air and Main Air Mixture Screws In Until SNUG **Do Not Jam** Then Reverse Both Screws 1 1/2 Turns. Holding the Throttle Full Open, Start the Engine. Turn the Main Air Mixture Screw Clockwise Until Proper Revs are Obtained. Occasionally you May have to Turn this Counter Clockwise to Achieve the Proper Revs. Now Allow the Engine to Idle. Set the Engine Idle Screw (Not Idle Air) so the Engine will Stay Running if Required. Now Set the Idle Air Mixture Screw so there is No Hesitation when Throttling from Idle to Full Throttle. Reset the Engine Idle if Required.****
>>If This Carburetor has a Single Air Adjustment (Except Tank Mounted 9200 and 100900 Engine Model Carburetors), Use the Section Above that Pertains to Full Throttle RPM Air Mixture Screw and then Adjust the Screw if Required to Eliminate Any Hesitation when Throttling from Idle to Full Throttle.
>>For the 9200 Model Tank Mounted Carburetor Adjust the Air Mixture Screw Full In, then Reverse 1 1/2 Turns. Set the Throttle Lever to Full Throttle and Start the Engine.
>>Now Carefully Use 1 Finger and Open the Throttle Plate and Over Rev the Engine Slightly. If the Engine Over Revs and Does Not Struggle to Over Rev, then the Carburetor is Set. If the Engine Struggles to Over Rev, then Turn the Adjustment Screw In 1/4 Turn and Repeat the Over Rev Test.
>>If you Adjust to 1/2 Turns In and the Engine Still Struggles to Over Rev, then Return the Adjustment Screw to 1 1/2 Turns Out from Snug and Turn the Screw Out 1/4 Turn. Do the Over Rev Test. Continue this Process Until you have the Engine Over Revving without Struggle.
>>By Adjusting the Carburetor on this Style Carburetor Until the Engine Over Revs without Struggle, you have Adjusted the Air Mixture to the Best Possible Setting.
>>This file was Intended to Give you the Basic Carburetor Cleaning Instructions and May Not Reflect Your Carburetor Components.
>>If you have Questions, Please Ask. The links above Provide Good Directions on Cleaning the Carburetor. Make sure you use an Compressed Air to Blow through all the Carburetor Passages to make sure they are Clear.
>>1- http://www.repairfaq.org/samnew/lmfaq/lmclctc.htm
>>2- http://www.cpdonline.com/692509.pdf .
Please, Do Not Hesitate, If I Missed Something or you Hit a Snag or this Does Not Correct the Problem, I am Here if You Require More Assistance.
Hope this Helps. Let me Know What Happens, Please. May the All Mighty Bless You and Yours. Be Safe and Be Happy. Thanks.

Good Luck

Respectfully

jbridger (John)

Posted on May 17, 2009

  • 21 Answers

SOURCE: john deere stx38 wont move transmission locked up?

Engine OFF, raise drive wheels and check if transmission is locked

Posted on Jul 14, 2009

  • 69 Answers

SOURCE: blades wont engage on a john deer riding mower

May be a safety switch not letting the PTO engage the clutch? Also check your voltage at the battery...too low a voltage won't let the clutch engage either. Should be between 13.3-14v at full throttle.

Posted on Sep 09, 2009

mickey813
  • 472 Answers

SOURCE: John Deere 160 riding mower. When I try to engage

CK THE SEAT SWICH OR THE BRAKE SWICH ONE OFEM IS BAD

Posted on Oct 02, 2009

  • 5 Answers

SOURCE: need john deere stx38 mower deck belt diagram

Go to http://outdoorpowerinfo.com/repairs/deere_stx38_gear_drive_belt.asp
for pictures and descriptions of drive belt and deck belt on John Deere STX38 and STX46 tractor with black deck

Posted on Oct 22, 2009

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I have a John Deere l130 and the mower blades engage when I start the engine even when the PTO switch is off. Any suggestions?


sounds like you have feed going directly from switch as soon as you turn ingition to start mode ?

check wiring back from electric clutch to main switch

possible 2 wires have been placed on main switch instead of pto switch ?

or you have a crossed circuit somewhere (that is feed from another live circuit) not directly connected and its ended up at electric clutch as soon as you liven main circuit


a wiring diagram may help

check with www.johndeere.com
or www.jdparts and enter their site load your model and type
and go to electrical system and print out a copy of wiring diagarm

you may need to supply and user name and apply for password from john deere via their site apply on line

its a good site for info and parts diagrams


cheers hope it helps

paul

Aug 05, 2010 | John Deere Pto Clutch For Stx38 And Stx46...

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Stx38 won't start


Actually, this is a problem with many lawn tractors. John Deere makes a "Starter Assist Kit" that sells for about $25. After time, the electrical connections get a bit corroded and when you turn the key the solenoid doesn't get the full current it needs to be activated. I have made my own relay to overcome this problem on my STX38, have shared with many folks with positive results as well. Cost is about $5 total. If you still have this problem and would like a schematic of the "fix", go to:
Mytractorforum.com, go the the Lawn and Garden section, click on John Deere. When the page opens, search STX38 and look for the thread started by "Brad". Info is in there.

Good Luck.

Apr 06, 2009 | Garden

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