I've got an old Stihl 031AV that I've had for years, never had a problem with it until a few weeks ago. It was running like a champ one day, the next day it started fine but won't speed up, sounds like it's bogging down.
I replaced the plug, cleaned the air filter and (Walbro) carb, didn't help.
I pulled the carb off and got a rebuild kit for it. Didn't help, still won't speed up.
I've set the low and high speed idle screws to the manual.
All of the passages in the carb are clean and not plugged.
The local saw shop didn't know what was wrong with it, but they wanted to sell me a new carb for $90 even though I don't think the carb is the problem.
It's got a good spark and compression, almost no carbon on the piston or top of the head.
Anybody got an idea of what the problem could be? I'm stumped.
Thanks in advance.
I replaced the plug, cleaned the air filter and (Walbro) carb, didn't help.
I pulled the carb off and got a rebuild kit for it. Didn't help, still won't speed up.
I've set the low and high speed idle screws to the manual.
All of the passages in the carb are clean and not plugged.
The local saw shop didn't know what was wrong with it, but they wanted to sell me a new carb for $90 even though I don't think the carb is the problem.
It's got a good spark and compression, almost no carbon on the piston or top of the head.
Anybody got an idea of what the problem could be? I'm stumped.
Thanks in advance.