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The cold weather may cause your Yamaha Timberwolf to experience hard starting, several months and no use, or a stale fuel supply. Start by replacing the spark plug, if the engine still does not fire up, clean the carburetor and make sure all the hoses are connected tightly with no air leaks. If none of these strategies work, the carburetor may need to be adjusted or replaced. You may want to take it to an experienced mechanic if you are unable to get the engine started.
Question edited for full 'year make model (what it is).
Question moved from motorcycles to make model category.
Please don't type in all CAPS, it is considered SHOUTING and is harder to read.
'clips' and 'turns' it took me a while to realise you were talking about the carburetor and you were playing with the mixture screw and needle position! 4 turns out is a lot different to the factory setting which is 1 1/2 turns out.
If it is overheating it is running too lean. As you changed the stator, also consider the ignition timing. Popping can also be caused by the ignition failing under load, coil, lead and spark plug.
http://www.partzilla.com/parts/search/Yamaha/ATV/1998/BIG+BEAR+4WD+-+YFM350FWBKC/CARBURETOR/parts.html this page shows the carb all pieces including air mixture pilot and main jets
sounds like the float in the carburetor or needle valve is failing and gas fills up the bowl, rides down the cylinder and into the oil pan. Do you notice gas pouring out into the air cleaner?
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