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Stihl blower


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#1 Stevens4x OFFLINE  

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Posted November 30, 2017 - 07:35 PM

I have a stihl bg85 and replaced fuel primer bulb and clunker and cleaned the carb out. Problem is it idles fine but when throttled bogs and dies. Saw a video that led me to clean the spark arrestor which made it idle even better but still same problem. Any thoughts? Tks!
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#2 dropped82 ONLINE  

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Posted November 30, 2017 - 08:00 PM

Did you dismantle the carb to clean it? There's a real small screen inside that gets clogged. It'll starve it for fuel anything above idle.

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#3 framesteer OFFLINE  

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Posted November 30, 2017 - 08:02 PM

Try to adjust the idle mixture screw to make it run more rich at idle (back the screw out in 1/4 turn increments to see if it helps).  Idle speed will decrease as the idle mixture gets richer, so you may also have to adjust the idle speed stop screw.  A richer idle may help the engine "transition" to the high speed circuit.



#4 boyscout862 ONLINE  

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Posted November 30, 2017 - 09:06 PM

I have not worked on the internals of a 2 cycle in many years but,  we used to have to clean the muffler and the port that it bolts to. The opening would be restricted by build up around its perimenter. Good Luck, Rick



#5 Texas Deere and Horse OFFLINE  

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Posted November 30, 2017 - 10:36 PM

I have the same blower model and I had to replace the carb because of ethanol dameage that I could never get rid of. Got an OEM carb off Amazon for 20.00+ if I remember right. Runs like a new one now.

Also, make sue the fuel line in the tank is good. Mine had got soft and had pin holes in it not letting it run hardly at all at full throttle.
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#6 bbuckler ONLINE  

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Posted December 01, 2017 - 12:02 AM

Here at my shop and 99% of other shops any 2 stroke carbs get replaced. 


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#7 chieffan OFFLINE  

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Posted December 01, 2017 - 05:01 PM

Here at my shop and 99% of other shops any 2 stroke carbs get replaced. 

 

Only way to do it.  Small carbs are not worth messing with as most of the time cleaning don't work.



#8 Stevens4x OFFLINE  

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Posted December 02, 2017 - 07:47 PM

I appreciate y’all helping out. I cleaned out the muffler and ex port, recleaned the carb, had to swap out the throttle cable and the hardware store didn’t have the correct fuel tubing size, and put it back together and tinkered with the mixture for bout an hour. That helped for a sec. Thinking I’ll try a new carb and then cut my losses if it doesn’t do the trick.

#9 Stevens4x OFFLINE  

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Posted December 06, 2017 - 02:38 PM

Wow this has turned into a hornets nest. I can’t find the part number or replacement. If you can help I sure would appreciate it- I’ve tried 2 Stihl dealers and they’re so secretive. My carb is non adjustable and uses a cable not pushrod. Zama C1q is all it says. Thanks again.

#10 WNYTractorTinkerer ONLINE  

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Posted December 06, 2017 - 03:11 PM

https://www.amazon.c...arburetor&psc=1


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#11 Stevens4x OFFLINE  

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Posted December 07, 2017 - 10:34 AM

https://www.amazon.c...arburetor&psc=1


Thank you- don’t know how to make it work though since it’s a pushrod type and I have a cable (pull)

#12 Stevens4x OFFLINE  

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Posted December 07, 2017 - 10:42 AM

Think I found it... thanks all!

https://rover.ebay.c...tm/253238582897
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#13 Texas Deere and Horse OFFLINE  

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Posted December 07, 2017 - 12:34 PM

Here's one of the items i bought for my blower and weed eater.

 

https://www.ebay.com/itm/142244364109

 

https://www.ebay.com/itm/390633150767

 

Hope these help.


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