Chances are the carb is full of 7-year-old crud. You can try draining the float bowl and allowing it to re-fill with clean gas, but it that doesn't work you will need to strip & clean the carb.
phil_saunders@bigfoot.com
Phil Saunders
May 2008
I can answer this question...
Honda harmony II HRT 216 mower starts up and stops immediately?