It sucks gas from the gas tank to the carborator using nothing but suction In general the primer bulb draws fuel from the tank through the carb and then returns it to the tank. Look for "carb" and "tank" on the primer bulb and make the respective connection. A line should come from the tank to the carb. Another from the carb to the primer. and another back to the tank.
cracked gas line, cracked bulb, or weedeater out of gas
Because it probably has a crack or a hole in it.
no gas, bad or disconnected gas line or cracked bulb. Possibly something small blocking the hole inside behind the primer bulb.
You either have a bad bulb or a bad fuel line between the bulb base and the gas tank. If there is the slightest hole or crack in the bulb it will not work. They are easy to replace.
Go to your local Small Engine Repair shop and ask for a gas cap with the primer pump on cap. They work great!
not getting gas.... needs carb cleaned
Very likely your primer which causes a vacuum to pull the fuel from the tank to the carburetor has a "rubber ball" and rubber gasket that has cracked, causing it to leak gas.
If you are talking about the bulb button it is a primer to get gas to the carburetor if the mower has not run for awhile. Usually not needed to restart a warm mower.
long line with filter goes from gas tank into carb shorter line goes to (INLET) suction side of primer bulb 3rd line goes from OUTLET side of primer bulb to other carb fitting
It is simply held in by plastic tabs on the primer bulb. All you have to do is pry behind it and easily pop it out with a flat screw driver.The tabs break easily but replacment primer bulbs are available.http://store.chainsawr.com/
Remove the filter cover. unhook the two fuel lines behind the primer bulb. Remove the two screws (inset star) that hold the carburetor, then gently rotate the filter base to expose the back of the primer bulb push the two retaining tabs and remove the primer taking notice which fuel lines go into it, one is longer than the other. Replace in reverse order and replace gaskets if damaged. Paul