Toro rider runs about 40 seconds and cuts off like a switch repeatedly
Toro riding mower 5 yrs. old. Runs a few minutes then engine turns off suddenly like you turned off the switch. Will start again after a minute or two delay, runs a couple of minutes and turns off. Does not seem to be a fuel starvation problem. Is there a switch, timer, or wiring problem that can cause this. The repair shop has had it in three times and their theory of trash in the fuel line or tank. Replaced carburator, cleaned fuel lines, replaced fuel. Nothing has helped. Any ideas?