Will all trimmer's primer bulbs work the same?
Will all trimmer's primer bulbs work the same? Do they pressurize tank or pull and pump fuel into the carb or both? I helped a neighbor replace her Weed Waker's bad fuel line and got the job done but starting w/n part of the job (1989 low end type)
1. The line from the primer bulb was recommended to just enter the tank vs into the fuel. Now I think about my trimmers. The Echo's bulb gets hard with fuel showing as if it is priming the carb to start. The Green Machine looks and feels it's pressurizing the tank to help prime the engine.
2. With her primer bulb's line just entering the tank vs fuel I felt it would be used to pressurize the tank. With a little interest I googled and possibly saw where the Weed Wacker was to be turned over starting which would put the short line in fuel. If so the bulb will probably fill with fuel and prime the carb vs pressurizing the tank.
3. This takes me back to my donated Greem Machine that starts easier when I prime it with a small amount of it 25:1 fuel vs trying to pressurize the tank (with no fuel showing in the good bulb, about 1970-80s with split shaft).
4. Could the lines be switched on the Green Machine causing the primer bulb not to fill with fuel?