Kubota TG1860G after 30 minutes engine shuts off

[puzzled]

After 30 minutes of mowing engine shuts off. Will restart after 30 minutes. I have rebuilt carb and just changed coils, ran 10 minutes and shut down. I am confused about what to do next

 

[BlazNT]

Get an inline spark tester. When it dies see if it is sparking when you try to restart. Coil may be going bad.

 

[bertsmobile1]

Get an inline spark tester. When it dies see if it is sparking when you try to restart. Coil may be going bad.

OR better still fit it and run the mower without the hood and watch what the plug tester is doing when the engine starts to play up.
If it stops flashing before the engine stops revolving you have an ignition problem.
If the tester flashes all the way to the bitter end then you have a fuel problem so you are now 1/2 to working out what is wrong.
Let us know how you go.
The hood is 99% ornimental so you can run the mower forever without it fitted.