On the new pt425s with the gas tank cap on the hood, notice where the gas tank is in relation to the exhaust. I know that it isn't safe to fill up a machine when it is hot, and it is even moreso onthese machines. Just a slight spill that would run down the side would cause you to have a real bad day. If for some reason you have to fill up when it is hot raise the hood and fill it up that way. By lifting the hood you are moving the gas tank away from the exhaust pipe. remember they have a heat sheild over the exhaust so unless you feel right in front of the exhaust pipe the machine might feel cool enough to fill up. Be patient and wait for the machine to cool down before attempting to fill.