Spark Plug

Most starting problems can be traced to either a fuel supply problem or an ignition problem.  If the fuel tank is full, and fuel is reaching the carburetor, make sure that the spark plug is tight in its socket and the spark plug wire is properly attached.  If both of those seem in order, remove the spark plug and inspect the end for deposits and wear.  To avoid this issue altogether, clean the spark plug and check the gap monthly, and install a new spark plug every 100 hours, or annually.