Switch from oil pump to premix no issues. After burning off the fogging oil from the winterization shut it down. Replaced the spark plugs new from the box The next day tried to start it and it would not start..Plenty of fuel, spark, compression battery is new.You can smell fuel in the exhaust and spin the engine without the plugs in it and fuel sprays from each cylinder. Plenty of compression so when it does not start it may hydro lock the cylinder. Remove the plugs and engine spins freely. Disassembled the start-shutdown-dead man switch and cleaned them and reassembled . All same issues remain. Where do I go from here?