My drum in dryer making noise.?
John Deere recommends a 2.5. All the heavy equipment on my job site has them. Get one with a quick release hanger,and mount it on the fuel tank side of your tractor. It's really for accidental fires during fueling and in case of engine fires.
One trick to make sure the gas is not leaking when you get it all set up is to put dish liquid on the joints with a Q-tip and if it bubbles up there is a leak.