What is reversion?Hard start , reversion and hard to keep tuned in .
when trying to start or while its running...or both?Reversion is when fuel blows out of the carb.
Another name for it fuel standoff . A serious case looks like a thick fog blowing out of the carb inlet.Reversion is simply the flow of exhaust gasses back into the combustion chamber when the downward movement
at the piston creates a vacuum in the cylinder. This event occurs when a camshaft is on the overlap, ;ie the exhaust
valve is still open as the intake stroke begins.
So on a 2 stroke with no valves (weed eaters have valves) but with reeds that are bad/damaged the result is fuel spitting out the carb?
what could cause "pin holes"? dirt/sand/small pieces of rock/silica? general material deterioration? something else?The one time I had a broken reed, it would run ok midrange and top end, but bottom end had a stutter that couldn't be tuned out with the carb, and poor accelleration through the first third of the RPM band....also hard to start. Thought it was ignition issue for a while, 'til I checked the reeds. Carbon reeds I'd check for pinholes and once I saw more than 4-5 per side, I replaced...
My west bend HAD metal reeds....Though not a metal valve they do the same function...