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John Deere 425 No spark won't start

12 years ago

I have a 425 AWS lawn tractor and it won't start. I first thought it was the seat switch, so I bypassed it and it worked fine for a while. The fuel pump works and both 15 amp fuses are good. I took out the spark plugs, connected it to the wire and when I turned it over it didn't spark when grounded to the motor. Neither side sparks so I don't think it is the coils. Does any one have any other ideas, Thanks.

Featured Answer

aws425

12 years ago

Replace "time delay" module. It used to be around $20 from your dealer. Item 30 in the diagram.
http://jdpc.deere.com/jdpc/servlet/com.deere.u90490.partscatalog.view.servlets.HomePageServlet_Alt

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Comments (12)

ALLJD
Original Author
12 years ago
Thank you for responding to my question. I put in the new part and it worked perfectly. It cost less than $20.00 for the part. This is a great website!
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There is no TDC on a 445. Given that statement (and please take this the right way) I highly warn against "throwing parts" at a 445 to solve the problem. You can drop some serious $$$ on components and then find it's something very simple. Thorough diagnostics are needed. Since you are not getting the EFI light, nor fuel pump operation, nor spark, it sounds like your EFI module is not working. There is a fuse specifically for the EFI module, and it's not one of the two on the circuit board (where the green light is). By the way, the green means "all go" for start, so your safety systems are OK. I don't remember the exact location of the EFI fuse, but it's in a separate rubber holder that branches off the harness. It may have a rubber cap on it. It is in the circuit board area under the dash. Dig around behind there and look for it. It's a 15 amp I think.
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apalmerjr
12 years ago
Uhh, exactly where is that time delay module? Wife's telling me ours won't start and I investigated it and it doesn't have any spark either. This must be a common problem with these.
aws425
12 years ago
If your sitting on the tractor, It's on the left side near the rear of the engine compartment. In the wiring harness assy. It's a square component and my new one was round.
herstads_gmail_com
12 years ago
I had the same thing. I stressed over it for a few days, thinking what the dealer would charge to get it fixed, then I read this page, bought the time delay module, for 20 bucks, and in ten minutes was out mowing! That little part is big trouble when it fails. At least its easy to change, and cheap. I'm so glad this forum exists, it saved me a lot of time and expense for sure.
siberfile
9 years ago
Thank you for the information. I had the same problem but it manifested itself with what I thought, was related to the heat of the engine. I replaced the time delay module and tractor is running fine. Module cost was $21.95. An alternative, the igniter would have cost close to $300.00.
imyz2u
8 years ago
last modified: 8 years ago
I can't seem to find anything in the wiring harness dia. that shows a "time delay" module. The #30 in the harness for my 425 says it's a PTO relay. My tractor was running and it quit as if I had turned the key off. Now it won't start and has no spark. Is this the same problem??
michelemeyer26
7 years ago
last modified: 7 years ago
I have same problem and changed time delay module. air filter, spark plugs, charged the battery. stil only turns over not starting. the seat thing is bypassed also. help?? what else I cannot find any answers
eimat21
7 years ago
I have a 155c with no spark. Should I have my brother check these same things on mine? Could it be a fuse? He already bypassed the seat safety sensor. It has a new spark plug and a new fuel pump.
tomplum
7 years ago
It sounds like it should go in and be repaired from your description.
Kris Judy Clark
7 years ago
Thank you all, I had the same problem with not starting. I replaced the time delay module and then it fired right up!
steve raddatz
5 months ago
20 bucks? I spent $55 on the time delay module (2023) so I got screwed going to a john deere dealership! I truly feel screwed over! this is what causes the dreaded inflation, but in this case inflation was what 200% wtf!

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