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Running for about a minute sounds like fuel starvation. There could be an obstruction in the fuel tank, which allows the engine only the fuel that is in the fuel line, until it quits.
Why it won't start again is probably another matter.
Hi there, I do not know the Craftsman mowers, but have experienced same problem with other makes. Suggest that you try the following, in this order. 1. Check that battery has water above top of plates. 2. Check that battery is well charged. Turn headlights on full and crank motor. If lights go VERY low then battery either needs charged from external mains charger or is defunct. Place large mirror in front to view lights during test. 3. Test that engine charging system is recharging battery during use. If battery is very low some systems will still start motor, but charger will not work. [Normally when this happens the dash charging light will show. Orange.]
The problem can be that as the electric clutch requires a lot of power to initiate the drive and a considerable load while running, if the battery is too low the engine generator cannot carry the load and so the system drops out. This may also stop the engine.
I dont have all your anwers. In my experience, Kohler frequently has wires to start, run and stop the engine. They also frequently have a low oil and/or high heat control (engine shut down). Also expect a wire from the charging system. On your tractor, you probably have similar plus 'operator presence' wires. These wires require to you to be sitting in the seat for the machine to operate - a seat switch for example. On my tractor, I can depress the 'brake' (which isnt exactly a brake in fact) and the engine will run when I dismount. However, if the mower is engaged, no matter what, if I get off the tractor, the engine shuts down.
You will have to determine what every wire is for and connect it properly. You may lose some engine 'functionality' or tractor safety features. It is never easy to put a Ford starter on a Chevy. Good luck with your project.
You will have to do a complete overhaul. That means taking the head off and opening the crank case to see why it seized. I have seen horizontal mmounted engines that have excess wear in the cylinder from lack of adequate oil distribution. Some of these engines use paddles to splash oil into the cylinder when it is running and that is not adequate.
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