ok well you need to have the engine properly broken in with the heat cycle method, fduring break in you will need to change the plug at least once ebcause break in eats up plugs and makes engines hard to start, now, the needle settings from the factory are usually wayyyyyy off, look up a tuning guide, here is a good one http://www.*********.org/cars_eng-tuning.htm and read it all, now once that is done, get a rechargable glow igniter, if you do not have one, get one, alkaline chargers really suck and make engines hard to start, once you have that fully charged then make sure your glow plug glows erally brightly, a dull glow doesnt get it, now, fill the tank up, and use the primer button on the tank to prime the engine, if your tank does not have a primer, take the pressure line from the pipe and blow into it, i usually have the line off of the carb too and i wait til the fuel comes out then i pinch it and put it on the carb and its usually perfectly primed, now you pull the pull start cord, quick pulls no more than 8 inches