After riding for about an hour, my rhino will start to overheat, spit and sputter and there is a strong smell of gas. If the rhino stalls or is cut off at this point it will not start up again until cool. My fan works fine. I would like advice on this problem. I have been told replace fuel pump, fuel filter, maybe a vapor lock of some kind. This same problem has happened to a couple of friends of mine who also own rhino 450's.