Today in Michigan 01/27/21, 30DegF I decided to start my 2018 B2650 and let it idle and heat up. The fuel system does have Stabal for Diesel, properly mixed. Started fine, idled fine, 5-7minutes, coolant temp was at first mark. Stopped...tried turning the key, nothing. It was though I left the mower engaged or an interlock was engaged preventing the engine from turning over, dash board was normal also, no error codes or alarms. I removed the fuel filter and cleaned everything. Started and idled for 1 minute, again shutdown, would not turn over. Do I have bad gas?