I have an Ariens string trimmer with a Tecumseh LEV120 motor and a 640262A carb (I think that’s what it is). It has a few hours of run time on it and has been sitting in a shed for several years.
The carb was gummed up due to neglect on my part. I took the carb apart and cleaned up everything I could and made sure all the passages were open. A new spark plug was installed and fresh gas was added.
My problem is it won’t start without a shot of starter fluid. Once I get it running, it seems ok. I don’t think the primer bulb is working.
I admit I don’t quite understand how the primer circuit works. I am assuming pressing and releasing the bulb is supposed to pull fuel out of the bowel and shoot it out of the tube towards the air cleaner. I’ve traced the circuit from the bowel pick up, up to the bulb and out to the discharge tube. Everything appears clear. I removed the primer bulb and the Welch plugs looking for blocked passages.
Can someone explain to me how this system works? I would have expected to see a check ball somewhere.
The parts diagram doesn’t show what I’m looking for. I think if I understand how this is supposed to work maybe I can get it working again.
Thanks for any advice,
Bill
The carb was gummed up due to neglect on my part. I took the carb apart and cleaned up everything I could and made sure all the passages were open. A new spark plug was installed and fresh gas was added.
My problem is it won’t start without a shot of starter fluid. Once I get it running, it seems ok. I don’t think the primer bulb is working.
I admit I don’t quite understand how the primer circuit works. I am assuming pressing and releasing the bulb is supposed to pull fuel out of the bowel and shoot it out of the tube towards the air cleaner. I’ve traced the circuit from the bowel pick up, up to the bulb and out to the discharge tube. Everything appears clear. I removed the primer bulb and the Welch plugs looking for blocked passages.
Can someone explain to me how this system works? I would have expected to see a check ball somewhere.
The parts diagram doesn’t show what I’m looking for. I think if I understand how this is supposed to work maybe I can get it working again.
Thanks for any advice,
Bill
Tecumseh carb question
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