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John Deere Tractors Discussion Forum
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LX188 quits after 40 minutes

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jpmm

05-17-2006 09:13:17




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I have a LX188 lawn tractor that stops (dead) after running for about 40-45 minutes of grass cutting. If I leave the tractor to cool down for 30 minutes or so it will again run for 40-45 minutes before quitting again. This seems to indicate an electrical problem, something gets hot and goes open circuit. The only single point failure item that I see in the electrical circuit is the (A1) Ignition Module. Any thoughts on what the cause could be?
p.s. I've jumpered battery power directly to the ignition circuit and the fuel shutoff solenoid just in case the (A2) Interlock Module was acting up - no effect!

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Henry M

05-17-2006 15:33:22




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 Re: LX188 quits after 40 minutes in reply to jpmm, 05-17-2006 09:13:17  
jpmm

That is the way mine acted, and it was the ignition module.

I would do a couple of checks first depending on how much you want to mess with it.

1. Just as soon as it dies, check for spark to insure that spark is the problem.

2. There is a lead going to the module that runs from the switch that grounds out the module when you want to turn the motor off. I would unhook this wire to make sure that the kill wire is not turning off the module.

then you will have it for sure.

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jpmm

05-18-2006 05:19:08




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 Re: LX188 quits after 40 minutes in reply to Henry M, 05-17-2006 15:33:22  
Henry M, Thanks for those two good points.
I should have thought about checking for spark at both plugs when it quit, I guess that's why its called experience.
As for your second point, "the key switch wire" going to the ignition module is actually battery power from the interlock module and not a grounding circuit as is the case in many situations. I actually have a schematic of the ignition circuit which I will copy & post as soon as I can figure out how to do it!!

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