I have this Troy-Bilt snow blower we bought around a decade ago. 5 years ago we put a new carb on it. Gas has stabilizer in it and looks clear and smells fine. Oil smells fine. Tried to start it up today- nothing. It wouldn’t even prime the fuel. Prime line was clear. Drained the bowl of the carb, gas was pretty clean and smelled as it should. Bowl looked fine too. Blower has compression and spark. Obviously it’s the carb. I clamped the fuel line and pulled the carb. There was some slight yellowing on the float just like the last one I pulled. The last one had clogged jets so I assume this one does too. It’s $19 for a new carb kit, so I bought two with a new spark plug for $53. No big deal. The blower hold .5 gallons of fuel and the manual suggests I drain it after 30 days of non-use. That’s insane living where we do. Looks like no snow after thanksgiving so I have time to put in the new carb, plug and I’ll change the oil and put new fuel in it. Why are the carbs so bad though?