Stihl BR340 Leaf Blower

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  #1  
Old 11-25-07, 10:05 AM
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Stihl BR340 Leaf Blower

My leaf blower (Stihl BR340 backpack model) does not operate at full power. It was working fine but not sure what caused it. I have emptied the gas tank and refueled with right fuel-oil mixture (50:1 as suggested by the manfaturer). The spark plug seems fine, too. Any suggestion? It is not even one year old. Thank you for your help.

Kevin

P.S.: While I was anxiously wating for suggestions, I tried a few things. I pulled out the fuel line - fuel is flowing freely to the carbeurator. I pulled out a filter that is attached to the fuel tank and cleaned it out with Gumout. I sprayed the the Gumout from the nozzle and if flows out from the other end thrrough the filter. The engine starts with no problem. Anything else should I try? Thank you for your help.
 

Last edited by bc9ltjj; 11-25-07 at 11:54 AM.
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  #2  
Old 11-25-07, 12:31 PM
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First thing to look at is the muffler and exhaust port.
There is a screen in the exhaust that gets easily clogged,
and can be cleaned by burning the carbon out with a
lighter. Also, bugs hiding from winter can build nests in
the exhaust. It is kind of like a potato in your cars tailpipe, no power.


Fish
 
  #3  
Old 11-25-07, 02:25 PM
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Fish,

Thank you very much. It now works great. Thank you again.

Kevin
 
  #4  
Old 11-25-07, 02:44 PM
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It is commonly caused by a clogged/dirty air filter,
so cleaning/replacement might be needed.


Fish
 
  #5  
Old 11-25-07, 03:15 PM
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Join Date: Jun 2006
Location: St. Louis
Posts: 2,365
Running too rich of a fuel mixture can accelerate the spark arrestor getting clogged. I hope you are using Stihl oil in your blower. Have a good one. Geo
 
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