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The only stupid questions are the ones that are not asked. That glass bowl underneath the gas tank is a combination dirt and water trap. The idea is dirt and water are heavier than gas and will settle into the bowl so they don't gum up the carb. However, the glass does need removing and cleaing out every month or so. If it gets too full of water or dirt, then this debris will travel down the fuel line to the carburetor. The carburetor float bowl is the rounded bottom half of the carburetor itself, on the side of the engine. This bowl holds fuel so it can be sucked up into the intake manifold air stream through the very small hole in the centre of the jet. Water or dirt in the carb will displace the fuel and block the jets so the engine runs poorly or not at all, Usually, this float bowl is held on by two screws, and can be removed and cleaned out with a clean rag, and a spray can of carburetor cleaner. If there is an accumulation of brown/green slimey- gummy-flakey stuff in the float bowl, then a bit of spraying the cleaner up into the rest of the carb can help. Also, when you remove the bowl, you will expose the carburetor float ( a black or brass hollow thing that should move up and down about 1/4 inch freely). this increases or decreases the fuel allowed into the carburetor. If it get stuck, it will either starve the engine for fuel,(Stuck up) or flood it.(Stuck down) I wouldn't suggest removing and disassembling the rest of the carb for cleaning unless you can get a service manual or diagram of the carb itself to serve as a guide. If I can respectfully suggest, these tractor engines are quite simple and easy to fix, compared to todays cars. If you can find a basic high school textbook on auto mechanics (anything written in the last 50 years or so), you can probably get a better idea of the function and repair of these systems than I could give you. Those books helped me, as I knew nothing when I started working on tractors, years ago. Hope this helps
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