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Kohler-Premature Shutdown


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#1 PaPasTractor OFFLINE  

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Posted May 01, 2013 - 02:34 PM

Hey guys, I have a problem I hope you can help me with.

Engine - Sears Kohler Command 15 OHV -   16 years old

Problem- The engine wants to quit running on its own.  Sometimes this will happen in 15- 20 minutes and sometimes it might be 45 - 60 minutes.  Seems to happen sooner when the temps outside are high. This just started happening at the end of last mowing season. Push it under a shade tree and let it cool it fires right up again.
I don't remember it happening during the fall last year when temps were cooler.
It happened just awhile ago today. I was mowing for the first time this season & temp is around 80 now. Any ideas ???

 

Note: all spring tune-up is complete.    Thanks alot, Dave



#2 Texas Deere and Horse OFFLINE  

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Posted May 01, 2013 - 02:41 PM

Dave, It's either the coil breaking down or a fuel problem.

 

I would check to see if you have spark just as soon as it quits running, if you do check and make sure your pumping fuel to the Carb.


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#3 HDWildBill OFFLINE  

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Posted May 01, 2013 - 02:49 PM

Ditto, with Brian's post.  Let us know what you find.


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#4 David Brown OFFLINE  

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Posted May 01, 2013 - 03:16 PM

I just went through this with one of mine.  Next time it shuts down, see if it will start right away.  If it does, it may be a ground problem.  That seems to be what my problem was.  If it has to cool down before you can start it, then its a coil problem more than likely.


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#5 LilysDad OFFLINE  

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Posted May 01, 2013 - 03:29 PM

Premature Shutdown

 

Some of our older members can relate.


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#6 PaPasTractor OFFLINE  

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Posted May 01, 2013 - 06:30 PM

Premature Shutdown

 

Some of our older members can relate.

:thumbs: ........ :bigrofl:



#7 PaPasTractor OFFLINE  

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Posted May 01, 2013 - 06:43 PM

Dave, It's either the coil breaking down or a fuel problem.

 

I would check to see if you have spark just as soon as it quits running, if you do check and make sure your pumping fuel to the Carb.

Well it did it again.  Let it set in the shade 'till after supper.  Went out and it fired up.  Did some more mowing (20 min.) and it shut down again.
At this rate it will take me 2 days to get all the mowing done...LoL

Fuel is not a problem, plenty of that. Good flow to carb.  Carb is clean.  I pulled the plug and turned the engine over only to see NO spark.  So I assume I will be replacing the coil.  Another question, will the stator need replaced also ?  Is it common for it to go bad too ?   Thanks, Dave



#8 Rock farmer OFFLINE  

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Posted May 01, 2013 - 07:25 PM

Paspastractor, congrats on the 141thanks for 141 posts!
I would replace the coil. And, the condenser. But, it could be a bad connection some where.

Joe
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#9 HDWildBill OFFLINE  

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Posted May 01, 2013 - 08:21 PM

Did you try another plug to see if it fired?  If no try another (maybe new) plug. If you still don't get any spark then coil is probably the culprit.  When you pull the tins off inspect the flywheel and make sure there are no cracks (might want to us a magnifying glass)


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#10 olcowhand OFFLINE  

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Posted May 01, 2013 - 08:26 PM

Premature Shutdown

 

Some of our older members can relate.

 

I was going to post that exact kind of thing.  The way I feel tonight is that to a T!



#11 DH1 OFFLINE  

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Posted May 01, 2013 - 08:30 PM

Did you check to see if the cooling fins are clean and free?


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#12 olcowhand OFFLINE  

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Posted May 01, 2013 - 08:31 PM

Did you check to see if the cooling fins are clean and free?

Yeah, I just took a shower, so my fins should be clean...oh wait....not directed at me huh!  :rolling:


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#13 olcowhand OFFLINE  

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Posted May 01, 2013 - 08:33 PM

Member Meangreen, my BIL just had this same thing with a Craftsman his new bride had when they got married.  He sold it to one of his coworkers, then before he could haul it to him, it started giving problems.  Start one time, then next time maybe backfires, then next time nothing!  A new coil fixed it & it runs like new again.


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#14 PaPasTractor OFFLINE  

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Posted May 02, 2013 - 09:29 PM

First off, many thanks to all for the rapid response to my dilemma.   You guys are great !!!!

I am sure it has something to with the coil as many of you stated.  Today around noon I went out to try and finish mowing.  Outside temp was mild around 68 with a nice breeze.  Took the hood off the tractor to help keep it cool.  Started right up.  It ran fine around 45 minutes.  No spits, sputters, hesitations and the best thing of all, no shutdown.  I will get a coil in the next couple of weeks and until then keep my fingers crossed when I mow again.  Again, thanks.


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