Grumpy, thanks for your detailed instructions, I should have explained I have had this trimmer for at least 10 years and it is only now I am having difficulty in starting it. As said, I have replaced numerous parts but cannot solve this issue. I have replaced the primer bulb. After priming and attempting to start the bulb appears to be empty and does not seem to hold the fuel. Often the motor will fire but fail to run until I semi choke the unit. Sorry this is the best way I can explain the problem, thanks Bill
