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O/T 2-stroke trimmer sucking air
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Posted by Rick YYC on June 29, 2005 at 12:53:48 from (205.206.80.244):
Can't figure out this problem with an older JD string trimmer
having an Echo 2 cycle engine, Zama carb. It starts and runs well at first, but then bogs and dies as more
and more air bubbles start coming up the fuel line. You can see
the bubbles in a section of clear fuel line. The intake end of the
line is well covered by fuel in the tank. Carb has been been cleaned with solvent and fishing line, all tiny
passages clear, diaphragm and gaskets appear to be good, float
valve works, fuel intake has been removed to eliminate
starvation from the equation. Spark and compression are no problem, as evidenced by good
running at first, but what could be doing that in the fuel supply?
Any advice gratefully accepted, thanks in advance. R
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