The past couple weeks I've been looking into several chainsaw brands and where or how far away one is, Stihl and Echo are close by so I been looking for bad reviews on Echo, hard to find til I was sent a link from the ArboristSite, boy was that a bad one. It's mostly about Echo 5 year warranty= No warranty, but besides the bad review and a $230.00 repair bill on a $300.00 saw, a couple post turned my world up side down.
Echo CS-490 DEAD after 11.5 months?
p-1#7>> You didn稚 mention what ratio mix you were using, but tuned for a 50 to 1, and if you used let痴 say 32 to 1, saw will run hotter and leaner and can score a piston if not re tuned for the different mix. There are many other reasons too. When a saw starts acting up, it痴 best to stop using it and find out why before damage begins.
p-6#12>>While the oil in the fuel is needed, it is also an impurity as to how fuel burns and octane rating is concerned . The more oil, the more you lower your octane. Lower the octane the hotter the burn. That's why on most cans of ready use it says they "use" 92 or 93 octane fuel, not "it is" that.
These two comments to me dont make since>>> "32 to 1, saw will run hotter and leaner "<<<< how can less gas and more oil make a saw run hotter and leaner? to me that would be better for breaking in a new saw, I usually go 40-1.
"Lower the octane the hotter the burn." <<<And this dont make since, I always thought the higher the octane the the hotter the burn and combustion which equal more power.
I was giving Echo CS-501p a hard look but now after reading that thread I'm not so sure. Then my son tells me today while he was in town 22 mile away he saw a Husqvarna 550xp for $570.00 at the hardware store, said they had full line up of Husqvarna saws, do I dare go Husqvarna again, I didn't even get 6 years out of the one I have...........
Now a couple other thoughts on that thread, I see all the posters rag on Echo's no warranty but where was all or any post saying>>"Wellllllll I have a Husqvarna, Stihl, Jonsered, RedMax, ABCXWZ saws with scored pistons and they warranted mine. Oh I get it those saws dont break down, didn't know that. A scored piston some say is from a gas issue, maybe not mixed or mixed with motor oil, so how can one prove it's a bad saw, they said Echo saws are to lean from factory, that could go back and forth for 9 pages, but IMO Echo should've took the high road and warranted the saw, might of gained a sale, possibly from me.
Now according to the OP Echo said that his was from sawdust that got into the carburetor because it was fine sawdust and Echo said it got in there because the chain was not properly maintained or in other words dull chain.