Stihl FS90 bogs down

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  #1  
Old 03-21-10, 10:38 AM
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Stihl FS90 bogs down

I've just started up my Stihl FS90 trimmer for the first time this year. It starts easily enough, but when I give it full throttle, it tends to bog down, even to the point of stopping. What is wrong?
 
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Old 03-21-10, 01:23 PM
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Pull the exhaust & make sure it's not pluged... If it's O.K You could try to open the lo jet 1/8 turn if you can & try it,, but you probably will need to put a complete kit in the carb as the diaghragms get stiff with age & from sitting & they can't properly meeter the fuel.....Roger
 
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Old 03-21-10, 02:47 PM
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Thanks for the reply. I'll try your suggestions. I should have mentioned that this is only the 2nd season for this machine, so nearly new. I wouldn't think aging would be a factor yet.
 
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Old 03-21-10, 02:57 PM
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Before doing any adjusting or repair---Make sure your gasoline is FRESH!
 
  #5  
Old 03-21-10, 08:16 PM
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If it's only the second year,, What is the warranty on Stihl?? Check into it... Giles is right,, make sure the fuel is fresh... Todays gas is a killer on these small engines, but if you have a blended fuel in your area & the fresh fuel doesen't help,,, I'm still betting a carb kit to fix it.... Roger
 
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