Paul Bunions
ArboristSite Operative
I stuck a 620 carb on my Echo CS-590, and it started fine. I put the saw down because I had an oiling problem, and I was waiting for a part. A few days later, I fixed the oiling system, put the saw back together, didn't mess with the carb, and the saw would not start.
I downloaded the procedure for adjusting a 620 carb, but the saw still would not start, so adjusting it was not possible. I left it at the setting the manual recommended, which was not the setting the carb arrived with.
Today I tried again. I had seen a video saying to pull the cord slowly a couple of times to suck fuel through the carb and never to yank the cord more than twice with the choke on, so I did those things, and the saw farted once but would not start. I put a cable tie on the trigger and started yanking, and the saw ran. I got it adjusted so the idle was right, but that's all I did.
A long time ago, I saw a video saying a flooded saw could be unflooded by holding the trigger down while starting, and that's why I used the cable tie.
My question: what does it mean when a saw will only start with the throttle wide open? Clearly, this saw floods just about instantly when you try to start it.
I guess one or both of the screws (L and H) must be in the wrong position, but I would like to have some clue before I try to adjust them.
I downloaded the procedure for adjusting a 620 carb, but the saw still would not start, so adjusting it was not possible. I left it at the setting the manual recommended, which was not the setting the carb arrived with.
Today I tried again. I had seen a video saying to pull the cord slowly a couple of times to suck fuel through the carb and never to yank the cord more than twice with the choke on, so I did those things, and the saw farted once but would not start. I put a cable tie on the trigger and started yanking, and the saw ran. I got it adjusted so the idle was right, but that's all I did.
A long time ago, I saw a video saying a flooded saw could be unflooded by holding the trigger down while starting, and that's why I used the cable tie.
My question: what does it mean when a saw will only start with the throttle wide open? Clearly, this saw floods just about instantly when you try to start it.
I guess one or both of the screws (L and H) must be in the wrong position, but I would like to have some clue before I try to adjust them.