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If you have a spark and it will start on starting fluid it is a fuel problem. If not you have a ignition problem. Check all switches and connections. Check neutral safety switch.
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you can pull the oil tube off the carb for a couple seconds while its running to see if it drips oil. I'd run a synthetic 2 stroke oil, lubes better and burns cleaner.
First - Did you find ALL the pieces of the broken piston...if not...STOP and FIND them.. they are in the bottom of the crankcase...you engine WILL NOT live long if you have not gotten ALL the pieces--even the TINIEST ones out!! You mat have more damage than just a broken piston.. something caused it to break.. you may have cracked the crankcases...may have damaged the main bearing(YES) and/or damaged the crank bearing.. see if gas in leaking into the transmission oil.
There is an arrow on the piston that faces toward the EXHAUST port. If there are hole(s) in the piston, they go towards the INTAKE.
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