Kohler K341S, Might have two different issues creating one problem

I am back. Valves are good. Realized something new. When the thing goes to die if I cut the power to the desk, mower continues to run no issues. I put new belts on at start of season. Also new idler pulley and bearing. Checked the rest of pulleys and bears all looked good. My understanding is the deck belt runs off the engine. If so is my engine dying?
 
Sounds like your charging system might be weak, assuming that you have battery ignition. Sounds like The pto clutch is robbing juice to your coil, and when you shut off the deck, sufficient voltage is again supplied to the ignition.

You need to check your output from the alt and regulator, and also might want to adjust your pto clutch, if it is
adjustable.
 
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