Please don't - - - -
run carb cleaner through your engine while it's running. It is a great solvent and will wash the lubrication right off of everything moving just when it needs it most. I hope I don't have to explain the consequences of that.As gasoline dries it leaves solid crap in itsplace. This stuff blocks tiny air and fuel passages resulting in rough or no idle, and occasionaly, if it's realy bad, no run at high speed. No fuel = no run.Best attack? pull the carb off, disassemble, spray with carb cleaner, blow out with compressed air, put it all back together. DO NOT clean jets or passages with wire or any other ham-fisted method.We used to get droves of motorcycles in each spring at the shops I worked at because the owners left gas in the carb over the winter. Big bucks to remove and clean a 4-bank of carbs, or even a single for that matter. I've done it more times than I could begin to count on all kinds of equipment. Any time I shut down a small engine for the day I run the carb out of fuel. Just detach the fuel line from it's connection, let it run. I always assume I won't start that engine again till the following season. Doing this has served me well for several decades.Little trick: With the engine running, as revs go up and the throttle is wide open, slap your hand over the carb's mouth. Let the throttle go and remove your hand before it stalls. Do this several times. (I don't want to hear from nay-sayers and worry-arts about this. If you're not competent to follow simple instructions and understand simple safety, DON'T try it! I and several thousand two-strokers have used this trick for more years than you can count.) This causes the engine to redirect a higher vacuum to the float bowl. If you get lucky that high vacuum will suck softer muck through the jets and emulsifyer and pass it through, leaving them clean enough to run somewhat better. If it works for you it might save you from disassembly and cleaning for a while. If the deposits are hard and crusty you outa luck!