I would pull the dipstick to make sure of no water ingress into the engine. I agree with draining the water from the fuel tank and water separator on the fuel line. You may wish to check/change the fuel filters. Was the machine stored inside or outside and how much fuel was in the tank. Check the air filters and raise the cab to make sure no mice built nests or chewed wiring.Pull plug on bottom of fuel tank to remove any water. sit in seat with arm bar up and try to start to make sure electric prim pump works. Start let it warm up to temp and change oil and fuel filters Then give her hell