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John Deere 216 Backfire


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#1 my69pony OFFLINE  

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Posted October 26, 2014 - 12:59 AM

I'm having trouble figuring out what is making my 216 backfire. The trouble started about mid summer and has gotten progressively worse. I can't even mow a single strip of lawn without having issues. It does seem to be worse under load then just sitting with no load on it. If I remember correctly, I did run the engine a bit low on oil this spring and it got a bit hot, but I'm not sure if that would effect it or not. My next step is the John Deere repair center, but I hope it may be something simple that a few adjustment may take care of. Grass cutting season is over, but I would like to get the 216 ready for the snowblower so any help would be appreciated. 

Brian


Edited by my69pony, October 26, 2014 - 01:00 AM.


#2 KennyP OFFLINE  

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Posted October 26, 2014 - 04:53 AM

What engine is in it? My Cub (K241) did that and the governor inside broke! Had to tear it down to replace!



#3 Trav1s ONLINE  

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Posted October 26, 2014 - 06:40 AM

216 has a k341 in it. I would check the following items
- points and condenser (replace with new)
- check plug (replace ttOo)
- clean and rebuild carb then adjust settings

What else can you tell us about it? Last tune up? Have you ever removed the head and cleaned the combustion chamber in the head?

#4 JDBrian OFFLINE  

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Posted October 26, 2014 - 06:49 AM

I'll second what Lowell has said. If you have a intermittent spark it can cause unburnt fuel to build up in the muffler and ignite. I would add that you should check all the wiring in the ignition circuit including the connection from the engine block back to the battery - terminal. Carbon buildup can cause all kinds of grief in those engines. If you don't want to pull the head you could try a Seafoam treatment. 


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#5 Cat385B ONLINE  

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Posted October 26, 2014 - 07:03 AM

Pulling the cover and inspecting the points would be my first stop, also.

#6 motobreeder OFFLINE  

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Posted October 26, 2014 - 10:20 AM

I'm going to watch this thread in case your solution is applicable.  I have a model 200 (16hp kohler) that just started running poorly.

 

Mine was idling at mid-throttle then it just started running wrong and backfired when I shut it down.  Now it's hard to start and backfiring.



#7 lyall ONLINE  

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Posted October 26, 2014 - 05:55 PM

after you have check the points, plug, and etc

 

I would also check the valves gap -

 intake should be between 0.008 to 0.010 cold

 exhaust should be between 0.017 to 0.020 cold

 

sometimes if the intake valve is not closing - it will cause backfiring

 

you can download the Kohler manual fro this site in the manual section or you can download it from Kohler site

 

good luck


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#8 Trav1s ONLINE  

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Posted October 27, 2014 - 09:42 AM

Did you get anywhere with this?  



#9 olcowhand ONLINE  

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Posted October 27, 2014 - 10:36 AM

I kinda feel it's the condenser.



#10 Trav1s ONLINE  

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Posted October 27, 2014 - 10:52 AM

I could see it being any one or all of the following things:

  • carb leans out when hot
  • condensor
  • points
  • carbon buildup in the head 

Someone suggested some Seafoam in the the gas.  I found out it works well - very well and eventually lost a head gasket on the k181 in my '66 110.



#11 motobreeder OFFLINE  

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Posted November 02, 2014 - 11:13 PM

Brian.  Hope you have a good result.

 

My JD300 (16hp Kohler) was running mid-idle and started running rough, popping and backfiring.

I thought for sure that it was toast.  The noise sounded like a blown motor.

 

After reading the responses here I decided to take a look at it.

 

Did some tests:

 - compression - 140 PSI (takes a strong battery to spin fast enough to get past the low-speed decompression)

 - spark was intermittent - sanding the points seemed to fix that

 - using a timing light to watch a bolt, it was jumping around (ran OK at idle, but poorly at higher speeds)

Ah - the condenser.  Sure enough, the ground bracket for the condenser was loose.  Tightened the bolt and tried again.

 

Happy to report that it's running like before.






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