A couple months ago I was given a CS-590 by a friend who was moving away and didn’t think he would use it again. He gave me all of his stuff with it also; chaps, helmet, chains, wedges and fuel. When I got it home I yanked the chain and it fired right up and I ran it for about ten seconds and thought “awesome can’t wait to get it into some wood”. Took it out to the woodpile a couple weeks ago thinking I was going to get a comparison between it and the 362. Instead it just fired and shut off, I thought I had gotten trigger happy and in-choked it too fast. It acted flooded and didn’t care to hit again after that, so I went on with the other saw. Got home, dried it out and gave it a few tanks. No luck, just a wet spark plug. Next thought was “I guess the pre-mix he gave me with the saw must be bad”, it was open when I got it and I didn’t know how long it had been open. So I dumped it out into my truck tank, made new and started over. Same outcome, won’t hit a lick, after a few yanks there’s fuel coming out of the exhaust, seems waaay too rich. I’m getting spark, I can take the plug out and hold it against the head and see spark with a yank on the rope. It has compression, I have not measured with a gauge, only by feel. Air filter is used, but not plugged by any means. Drained the fuel out of the tank again, thinking I’d check out the carb. Got the idea to yank the rope a few times with the tank empty, yanked the rope and it started right away so I let it run what little fuel it had in the line out. Cool, maybe it changed its mind. Put fuel in the tank, all it does is flood again. Retry draining tank to see if I managed to cause some strange fluke. It ran again for a few seconds after the tank was drained and then just flooded again after putting fuel in it. Repeated the process again this evening after letting it sit over the weekend, same deal. I’m a bit perplexed as to why it will run after draining the tank, but won’t hit a lick with fuel in the tank. I thought the point was to put fuel in tank and run it. I’m hoping it’s something simple I just don’t know about. Any ideas?
You try to start it in the "flooded" position? (no choke, wide open throttle) Sounds like the carb will need cleaned, maybe rebuilt.
Sounds like the carb is bad. There is a metering needle in there and it sounds like it is stuck open. I would put another carb kit in it and make sure you clean it real good in an ultrasonic cleaner.
