I have a john deere f725 i replaced ignition module but still no spark on either side what do i try next?

A sheared flywheel key will not. This version of the Kohler CV employs fixed timing with a basic ignition module. A sheared flywheel key would not prevent spark but rather produce spark at the wrong time.

A simple test would be to disconnect the kill wire at the module and then check spark.

The module listed is JD MIU11542. They appear to be near symetrical and it may be possible (?) to install mirrored. The ignition module will not operate with a reversed field. Be sure to match the orientation of the working ignition module.

Comment for further assistance.

I am guessing the ignition is a self-contained module so unless the kill switch or wire is damaged and grounding or the flywheel magnet has lost magnetism the ignition module will have to be replaced - unless the spark plug connector is a suppressor type and then it is possible the internal resistor is open circuit.

I would check for spark the next time is stalls out.

Yes here is a picture of mine. Love the old iron. 2500 hrs. I've pretty much gone all though it. Not that it needed it.

Did you replace the IGNITION coil or the "PULSING coil"? There are two different types on that engine. The ignition coil makes the high-voltage spark, the pulsing coil is a sensor that tells the ignition control module when to tell the ignition coil to make that spark. The pulsing coil is pretty inexpensive on eBay.

If you change both the ignition coil and the pulsing coil and the problem still persists, you may need to replace the ignition control module.

Unfortunately, they don't make these things simple any more, or easy to troubleshoot.

They aren't cheap that's for sure. Have you tried taking the part number and doing a google search? You may be amazed at some aftermarket prices. Do you have part number, I can check too.

I’m happy to assist further over the phone at https://www.6ya.com/expert/layne_0fccff498c319c32

there is a black wire a that goes to the ignition on the side of the engine next to the manifold unplug that and see if you get spark with that off if you do follow that wire back to the safety switches

hi there pauly46 here

type f725 in the search box - under j/d cataloue

here is web site adress to go to that page
http://jdpc.deere.com/jdpc/servlet/com.deere.u90490.partscatalog.view.servlets.HomePageServlet_Alt?search=model&model=f725

select f725 ,select sectional index , select mower deck and lift linkage,select mower drive belts sheaves and spindles ,

then a window with deck parts and diagram will appear

print this off

it will give a good idea of belt routing for deck


take a look and hope it helps

cheers pauly46

Could be ignition module overheating, but then the coke influence doesn't make sense. Once it quits try either a shot of starting fluid in the carb, or tiny bit of gas. If it runs then you know you have a fuel problem. Check to be sure the gas cap is venting and check to be sure you're not getting vapor lock after the motor gets so hot. You could also disconnect fuel line to be fuel pump is pumping. Does it have a kawasaki engine? Beware of some plastic cam gears.

If your talking about the mower blades, it can be a weak battery.