Hey, I went to start my 18-yr old Mantis tiller w/Echo 2-cycle just to check it out, fueled it and hit the primer bulb - which broke. :( So I picked up another one and installed it but it wouldn't suck up any fuel. I figured I put it on carelessly and maybe it had a leak, so I went out this morning with my screwdriver to re-set it, but decided to try it again - it worked! I had run the thing dry before when I put it away, so I guess fuel was delayed getting to the carb for some reason, like maybe it 'lost it's prime'. Whatever, it's pumping fuel now and the old Mantis still runs like new. Echo engines are top notch.