| first replace the spark plug to a NGK plug
then if it still wont start look at the fuel system you can test this by pouring 13 of a coke lid of fuel down the spark plug hole put your plug back in & see if it fires
if it fires then cuts out you have a fuel restriction
if it wont fire with a new plug it is probbly a spark problem
you can use the search option at the top of the forum as this question has been covered several times | 
