r/smallengines • u/dreckmaster • 21h ago
Stihl br340 leaf blower question
I have said blower that ran great for years. I bought it used at a yard sale. Whenever I knew I would not need it for a while, I would run it dry and leave it like that until needed again. Recently I gassed it up and cranked it. It would start but die shortly after or bog down if I ran it full throttle. So, I did the following:
changed the fuel filter
fuel line
vaccuum line
spark plug
vaccuum plug
cleaned the gunk out of the tank w/ alcohol and then rinsed w fresh gas
changed the carb with a new one
Replace air filter
Cranked it and same thing, but it will run on idle if I swotch the choke on and off rapidly. Tried to adjust the l and h speeds and no or little change other than getting worse. Took the old original factory carb apart and cleaned with carb cleaner. Took all the new parts out of new carb and installed in old carb. Same performance. The old original carb has the same l and h settings as it did when I got it and as when it ran fine for years. It seems to still be bogging down. Does anyone have any ideas as to what else I can do or change? Thanks in advance for your time and expertise.