In order to use "bladder pressure", you fill the bladder by the fuel line on the engine. Then you need to clamp the fuel line with something,"I use a hemostat". If you don't the fuel will simply gush out the spray bar before you get the engine started. When you prime the engine for starting, you are ready to start. When the engine starts, you release the hemostat and the engine will scream like you never heard before. The needle setting is usually about 1/2 to 3/4 turns out from closed. Remember with this setup, the engine will not last long.[X(] With great engine speed comes short engine life. If this engine is the one with the nickle plated cylinder, It will mabe last 8 hours running like this.[]