Small Engines (Lawn Mowers, etc.): John Deere Lawn Tractor turns over but not starting, john deere lawn tractor, john deere lawn


Question
Hi John,

I have replaced the ignition coil (part 21119)and still have no spark at the plug.  I also pulled what I believe to be the coil shut off wire from part 21121 and still have no spark at the plug.  When using a volt meter at the plug wire, I get very little current and what is there is highly variable.  That kind of volt readings should I be getting at the plug?  Any additional ideas?

Thanks for your help!

Dan

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Question -
Hi John,

Well, I think I am making progress but do not have the answer. Here is what I have done.

1) I wraped a wire around the plug threads and attached the other end to a bolt on the tractor.  There was no fire at the plug when I hold the end close to metal.  Am I doing this wrong?

2) I have by-passed the seat safety switch, still no fire at the plug.  I am not able to find the blade safety switch.  Is this the blade switch on the dash board?

3) I took part of the carb apart and the bowl was full of fuel but otherwise it looked ok to me.  I can tell you when you remove the plug, you can smell fuel.  


Is it time to start looking at the ignition module?  Can a volt tester be utilized to isolate the problem?

Thanks for your superb help!!!!
2)  By-passed the seat safety switch.  
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Question -

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Followup To

Question -
Hi,

I have a John Deere lawn tractor (can't remember the model) that is about 9 years old.  It was running nicely, ran out of fuel, and then refused to start when turned over repeatedly (after a fill up).  Generally it is very easy to start.  All fuel lines are still carrying fuel and I have replaced the spark plug.  When I remove the plug but keep it connected to the wire, I am unable to get an arc when held close to metal.  What is likely the issue here (ignition coil etc)

Thanks,

Dan

Answer -
 Hello Dan:

 Have you Checked All the Safety Switches? Remove the Shut Off Wire from the Throttle Control Bracket. Turn the Engine and Check for Fire at the Plug.  If there is Fire, then One of the Safety Switches is Bad. Try the Blade Safety First. Then the Seat Safety. If No Fire, then the Ignition Module/Coil is Bad. Send me the Make and Model Numbers Off of the Frame and the Engine and I can Assist you Better. Hope this Helps. Let me know what Happens, Please.

 Good Luck

 Respectfully

 John

John,

Thanks for your help.  I have not had a chance to try what you recommend but have the following for your consideration:

Engine Manufacturer:  Kawasaki
serial #:  FC420-036046
Model: FC420V

Tractor Model:  Hydro 175
Product ID: M00175x599078

Based upon this additional information, if you have any additional thoughts please let me know.

Many Thanks,

Dan


Answer -
 Hello Dan:

 When Checking for Fire at the Plug, you need to Wrap a Wire Around the Plug Threads and Attach the Other End of the Wire to the Bolt Above the Plug. This Ensures A good Ground to the Plug. However, Im thinking Trash was Pulled into the Carb when the Tank went Dry. Hope this Helps. Let me know what Happens, Please.

 Good Luck

 Respectfully

 John

Answer -
 Hello Dan:

 Find the Coil Shut Off Wire. Disconnect it so that it is Isolated from the Rest of the Harrness. Check for Fire at the Spark Plug. If you Have Fire, then The Coil and Igniter are Good. If there is no Fire, Check the Igniter (part number 21119). The Igniter will go Bad Before the Coil Does. You can View the Breakdown at this Link *http://www.buykawpower.com/kmcb2c/Menu?action=CATALOGB2B&prodID=2670141&elementT. Hope this Helps. Let me know what Happens, Please.

 Good Luck

 Respectfully

 John

Answer
 Hello Dan:

 When you Disconnected the Coil Shut Off Wire, was it Before of After the Igniter? Look at the Diagram (the link I gave you) and you will see where the Wire should have the Igniter Plugged in at. Go to the Next Connector in the Line after the Igniter (going away from the Coil) and Disconnect it from there. Im still not sure the Problem isnt in the Carburator. As you stated in you First Email. All it did was Run out of Gas. That Indicates to me that Trash/Water was Sucked into the Carburator. However, Im not going to say there's not a Problem with the Ignition System. It just seems too complicated for just Running Out of Gas. I am going to Consult someone who has been doing this for Over 60 yrs and see what they have to say about this type of Problem. Have you Tried to Run the Engine for 25 to 30 Seconds with Starter Fluid? Sometimes it is Hard to see the Spark at the Plug if it is a Bluish Color. Hope this Helps. Let me know what Happens, Please.

 Good Luck

 Respectfully

 John