You didn't add oil to your two stroke leaf blower now it won't start.?

If you mean that you did not add oil to the gasoline you used in your leaf blower, you have probably burned up the engine. Two stroke engines do not have a separate oil system, instead getting the lubrication needed from oil in the fuel. There are some two stroke engines which have oil injectors, which inject the oil into the fuel prior to the fuel going to the engine, but these are extremely rare.

Let me add to the above comment. 2 cycle engines oil must be mixed prior to adding fuel to the tank of the unit. However, with the new EPA laws going into effect, there are more and more 4 cycle blowers being produced by larger name manufactures, because the lower end companies cant produce them cheap enough, so more current units do in fact have a separate oil and gas tank, if it is a 4 cycle. What most consumers don't understand and seem to follow is they go to "mix up" some 2 cycle fuel, they add the oil, then add the gas and shake, great. Now a week later they pick up the unit to use and it has almost a full tank of gas so they just start it and go to work. Oil is heavier than fuel, so in that time period it has sat, the oil and gas has separated, so when you first start the machine you notice it smokes considerable, then after a few minutes it seems to stop, you are now burning straight fuel, just as if you didn't mix it. The fuel lines pull from the bottom of the tank, so when it first started it had twice as much oil, when it burns that down now there is no oil. So each time you pick up the jug of fuel, or the unit, always shake them, always...