SteveSr
Addicted to ArboristSite
Hello,
This saw was used intermittently by one of our trail volunteers. Saw was originally completely rebuilt and tested about a year ago. At the time it would run 14-14.5 K at WOT out of the wood. It was definitely NOT running rich, at least at WOT.
Got the saw back about a month ago with the complaint of no start. Checked the plug and it was oil/gas fouled. User said that they has just recently cleaned the air filter so I never got to see how bad it was. Put in a new plug and burned all of the accumulated oil out of it. I was also expecting that this and proper WOT running would clean any crud from the spark screen.
Got the saw back again yesterday. It would start and idle but wouldn't rev past idle. I first checked the carb and found nothing. Then I decided to check the spark screen and found it completely plugged with black carbon!
So now I am trying to figure out how this user managed to completely clog the spark screen. It is not like you could get any amount of cutting done with this small saw at part throttle operation. I am beginning to think that this started with the dirty air filter and went down hill from there. After looking at the muffler design with many SMALL outlet holes I have just about convinced myself that the screen will never get hot enough to burn off any carbon deposits.
Your thoughts?
This saw was used intermittently by one of our trail volunteers. Saw was originally completely rebuilt and tested about a year ago. At the time it would run 14-14.5 K at WOT out of the wood. It was definitely NOT running rich, at least at WOT.
Got the saw back about a month ago with the complaint of no start. Checked the plug and it was oil/gas fouled. User said that they has just recently cleaned the air filter so I never got to see how bad it was. Put in a new plug and burned all of the accumulated oil out of it. I was also expecting that this and proper WOT running would clean any crud from the spark screen.
Got the saw back again yesterday. It would start and idle but wouldn't rev past idle. I first checked the carb and found nothing. Then I decided to check the spark screen and found it completely plugged with black carbon!
So now I am trying to figure out how this user managed to completely clog the spark screen. It is not like you could get any amount of cutting done with this small saw at part throttle operation. I am beginning to think that this started with the dirty air filter and went down hill from there. After looking at the muffler design with many SMALL outlet holes I have just about convinced myself that the screen will never get hot enough to burn off any carbon deposits.
Your thoughts?