How old? Fuel injected or carburetor? First thing look on floor for gas or under cart for drips or wetness? Then, I pull air filter out see if you see raw gas? Should smell like gas but should not be drippy. look for gas wetness starting at carburetor, inlet tube (intake manifold that attached carburetor to engine head) gas line especially at clamps, or if old look for dry rot on fuel hose around engine where all heat is. Following gas line back to gas tank (if carb. You’ll have external filter, usually cheap plastic clear housing) now look at gas tank any signs of wetness or wet dust spots where dust collects to wetness? You also have look at bottom of gas tank. If you smelling raw gas (different from carb rich exhaust smell like when following gas car through tunnel) you should see some signs of wetness. If this if carb and the cart and hard starting and misses and shoots black smoke out tailpipe it might be carb adjustment or seals leaking internally? If fuel injected do same look at system for wetness. Looks like you have other cart you can compare if see any wetness and compare to other cart fuel system. Meaning if you see something see if same on other cart if systems same?
Again if fuel injection different system and all you can do look for leaks or wetness?
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