Hoping some of the more experienced guys on here can let me know what they think...
I recently purchased a saw for use around a couple of small lakes I help maintain as part of an angling club. I purchased a chain saw identical to this one - http://www.huttimports.co.uk/52cc-chainsaw-p-291.html?osCsid=o4cdmqfcr9rpn5hf9b1rmr53p2
I know it's not a stihl or husqvarna but it will not get much use and will only have to deal with any wind blow trees and occasional removal of some branches hence couldn't justify spending out for a brand name. The saw cost me £78.00 all in, local husqvarna dealer offered a well battered looking second hand older version of the 440 for a bargain £180 cash:thumbdown:
Anyways cheap saw arrived, put it together, started fine etc. I was using it in anger at the weekend to deal with a wind blown tree (approx 20cm diameter tree) that's been around a while and all was going really well until after about 15 - 20 minutes use the saw started to lose revs part way through a cut, if i lifted the bar slightly revs would go right back up to full and would cut normal again, next cut same thing happened then it started to lose revs more and more during a cut until it died part way through a cut and then wouldn't restart.
I checked usuals such as fuel, fuel filter, air filter, removed plug and checked for spark, chain tension was fine etc, put it all back together and it started no problem, idled for a couple of seconds and then died, if you tried to rev it it would also just die (fuel starvation?). I gave up at that point came home with the hump. Fiddled around with it a bit more later that evening, blew the fuel lines on air compressor etc, still would start first pull then die after a couple of seconds and die when trying to rev every time, I then adjusted the low speed on the carb back to shut, then back to same place (manufacturer recommended setting) and it's started fine and idled and went to full revs and then idled happily for 5 minutes, was fine when I started it last night after work and tonight although I haven't cut anything with it again yet.
So in my view the only thing that made any difference was to shut off the low speed adjuster and put it back to same place which doesn't make a lot of sense, do you think it was as simple as something iffy on the low speed jet which was fixed by simply moving it or something more sinister that's going to get worse?