Yes, it's an old saw but it has given years of faithful service and I can't just give up on it. Well, that and I don't have to cash for a new one... It's been getting more difficult to run. I'd have to set the throttle wide open to start it and nurse the choke in and and out to keep it from bogging down (even idling on the ground). Which is another thing it hasn't done for a while, idling. I replaced the bar and chain along with a new plug, cleaned up the carb and filter. Cleaned out the oiler area, scrubbed out a few pounds of sawdust, twigs, etc. It started without much trouble and ran better than it has for a while, but still have to play with the choke and throttle to keep it going and it still stalls out when I let off the throttle. (The new bar/chain oil MUCH better and cut nicely) I credit the cleaning and the new plug for most of the improvement. I feel as though I need to mess with the air and fuel screws on the carb, but unsure just how to rough tune and fine tune them on a chainsaw. It's *almost* there. I'd like to get it to run without bogging down and if it would idle, I'd be thrilled. But not bogging down is my only real "must have". Any suggestions, aside from give up and buy a new one? (Next year) The parts list: Plug is a Champion CJ7Y @ 0.025" The bar/chain are Oregon 39272 18" I also got a carb kit and fuel filter for a winter project.
On a saw of that vintage, I would check compression first. Then a thorough carb cleaning, carb kit, and new fuel/impulse lines would be in order. It might respond to 1/4 turn out on the L screw but that's a crapshoot.
For the moment I'll have to trust the compression until I can get it my buddy's place. He has a tester. It "feels" ok. The carb kit I bought already, and a fuel filter. I hadn't thought of replacing the fuel line and had no idea such a thing as an impulse line existed. I'll see if I can find those parts.
I'm not intimately familiar with those old echo saws but they may or may not have an impulse line. Some saws transfer the crankcase impulse to the fuel pump in the carb via a tiny hole in the intake block/boot. Cut4fun might be able to help a bit here.
