starting problemsPLEASE HELP

Just out of curiousity, have you pulled any plugs to check them? If a bigger carb was just swapped, perhaps you flooded it. I would pull each plug one at a time. If they are wet, and smell like fuel, you can use brake or carb cleaner to clean them off and dry them, but they will need replacement. (or you could just pop in a new set) As they said, you need compression (that deosnt change overnight by itself), fuel (which it sounds like you have plenty of), an spark (which can be effected by too much fuel, plus stuff just dies overnight). You can also check with a cheap "spark tester" to see if the ignition's working. It costs about $5 at the parts store.