I have an old 298. I just got it and it start but once it runing the r.p.m stays very high. I checked the link from the handle to the carburator and it's going all the way back and forward easily.
Does anyone have an idea?
Clogged carb or air leak or bad fuel lines. Steve
Yeah like Steve says normally sucking air or a Bad Diaphragm . Check the fuel lines 1st then check out the carb for stretched or sagging (wrinkled) diaphram . You may need a thorough cleaning or perhaps a rebuild kit on a older saw.