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Hot!Kohler Tractor Engine runs for 7 minutes and then dies....must cool to restart.

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befast
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2020/05/11 21:41:22 (permalink)
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Kohler Tractor Engine runs for 7 minutes and then dies....must cool to restart.

I changed the fuel tank, fuel cap, fuel lines, gas filter, solenoid, spark plug, and ignition coil.  The tractor runs for about seven minutes and then sputters and dies.  I can restart it but the same thing happens after two minutes and then it will not start at all.  I must let it cool for 30 minutes an then can start the process all over again. 
 
I noticed that my fuel filter is 25-050-22-S and not the 25-050-21-S as specs state.  Would that matter?
 
The replacement ignition coil I purchased and installed from a reputable dealer was USED....$15.  Is it possible this is bad?
 
Engine TypeKohler 18.0 HPEngine Modelmodel CV492 type 27506

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    Roy
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    Re: Kohler Tractor Engine runs for 7 minutes and then dies....must cool to restart. 2020/05/12 02:50:22 (permalink)
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    Very possible.
    befast
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    Re: Kohler Tractor Engine runs for 7 minutes and then dies....must cool to restart. 2020/05/12 06:12:42 (permalink)
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    So do I change both again?
    AVB
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    Re: Kohler Tractor Engine runs for 7 minutes and then dies....must cool to restart. 2020/05/12 07:33:09 (permalink)
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    Well the filter specs are
     
    2505021-S 75 Micron for Gravity Fed systems
    2505022-S 51 Micron for Fuel Pump systems
     
    I have use tighter spec filter on gravity systems without problems but that depends on the tank and its location. Matter of fact I use a 25 Micron filter on my Briggs engine on the Bolens rider that I just retired. Retire it as I went to 42" cut from the 38" cut.
     
    And it does sounds like the used ignition is bad as the electronics that are overly heat sensitive. Semiconductors do become heat sensitive as they age. I know I have replaced a lot of them over the years in office and radio equipment.
    post edited by AVB - 2020/05/12 07:35:10
    befast
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    Re: Kohler Tractor Engine runs for 7 minutes and then dies....must cool to restart. 2020/05/12 10:28:04 (permalink)
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    Thank you!!!!   I changed the fuel filter using the 21 model and it worked!!!  
    J
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    Re: Kohler Tractor Engine runs for 7 minutes and then dies....must cool to restart. 2020/05/14 19:35:45 (permalink)
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    I'm having same problem did you have to replace the ignition coil was that causing it not to stay on? I even changed my carburator.....kt735 24 hp
    befast
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    Re: Kohler Tractor Engine runs for 7 minutes and then dies....must cool to restart. 2020/05/15 15:26:13 (permalink)
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    J-  I did a lot of reading.  Here is what I did....  changed the fuel lines and tank, changed the fuel filter, changed the solenoid and changed the ignition coil.  I do not think the tank did anything.  If I had to do it again, change the fuel filter first.  Make SURE you use the 21 model and not the 22.  See above for the difference.  If that does not work, change the solenoid.  It unscrews out of the bottom of the carb.  If all else fails, change the ignition coil.  I am NOT a pro but changing the coil was easy.  I kept track where each screw went and I moved slowly throughout the process.  The folks on this BLOG were great help as was YOUTUBE videos.  Good luck!
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