If gasoline is allowed to sit in your gas tank too long it can oxidize and go “stale”. Actually it doesn’t take very long. In a vented tank gas can go stale within 60 days or so. Gas is actually a mixture of different hydrocarbons and in as the lighter ones evaporate the heavier ones are left behind leaving gasoline that is slightly thicker than the original mixture and has an odor like varnish. The problem with stale gas is that it can leave gummy varnish-like deposits in the jets in your carburetor. Of course you shouldn’t go around smelling your gas tank to see if it has a varnish odor. If the carburetor has become clogged by these deposits it may need to be soaked in carburetor cleaner. First remove all the rubber pieces. After soaking the carburetor replace all the gaskets with new ones and reinstall the carburetor. Make sure the gas tank is clean and dispose of the stale gasoline properly. Don’t pour it on the ground and don’t leave it sitting out in the garage. If possible it is best to run the engine until the tank is empty. If your golf cart isn’t used very frequently and a tank of gas lasts you more than a couple of weeks, you may want to consider a gasoline additive that will slow the oxidation process and extend the storage time.