1st thing to do is : drain that oil now ! then next take the spark plug out and leave that oil plug out for now. pull rope cord at least 10 times and listen, make sure nothing is hanging up . now attach spark to wire lay up top of cylinder on metal part watch to see if you have spark ,don`t touch it while pulling cord over make sure ignition switch is on too when doing this.now if this stuff is fine. put oil plug ,put new oil in,now pull cord again 5 times so its reoil coated.,now install spark plug correctly and see if engine turns over.if engine turns over but does not fire ,pull spark plug again put in spark plug hole a table spoon of gas quickly and quickly get plug back in and see right away if engine fires.good luck