remove engine air cleaner. with help of an assistant, crank engine while spraying rattlecan carb cleaner down carb throat. If engine catches and tries to start, you have a fuel delivery prob. If nothing, remove spark plug wire - ground plug threads to engine casting (bare metal) - crank engine- look for bright blue spark.
fuel delivery prob - trace fuel line from tank bottom to carb. if gravity feed, simply remove hose st carb, catching fuel in container. look for good flow. If fuel pump involved, do same except crank engine to observe good fuel flow from pump.
If all OK there, remove carb bowl - give it a thorough cleaning. spray rattlecan carb cleaner into all passageways, stick small dia tag wire thru hole, blow out with compressed air. use magnifier to closely inspect. also check fuel inlet valve and afterfire solenoid function if equipped.
post back with result/comments.