Non adjustable Stihl carb

[Trey]

Bought a Stihl FS90 trimmer today. It comes with a non adjustable carb.
At my altitude, I MUST adjust my fuel richness. The tool is a dealer item only- not for sale.
Now you know...

 

[BigBlue]

Try Ebay for the tool or maybe you can adjust the metering lever to enrich the carburetor. There are videos on YouTube on how to rebuild Walbro carburetors and adjust the metering height. I believe if you raise the metering lever, you enrichen the fuel ratio.

Here's a YouTube video on the Stihl FS90 that might help:
http://www.youtube.com/watch?v=cLaUYYuf9XM

Take it to a local shop and have them adjust it.

Chris
AKA: BigBlue

 

[maniac57]

Swap out the carb for one with adjustments you need? Maybe a earlier model?

 

[Trey]

Good suggestions fellas! Just wanted to give a heads up to people on this deal.
I intend to temporarily procure the tool in question, study it intently, and reproduce it.
Unless the EPA doesn't allow that, in which case I will bow before my masters, and fully comply with all unconstitutional demands, and be happy about it.
See? I'm smiling.

 

[Tool Maker]

Somewhere, at the bottom of all of the plastic BS... there is still a screw.

I lived in northern Colorado for a few years. Limiter caps seem to fall off there.

With the carb on the bench, you can figure out how to fix things. Sometimes it takes a red hot utility knife blade - will not hurt the metal screw at all.

As for making fuel adjustments, it is the responsible thing to do - because at high altitudes they run RICH, and you are doing the right thing by adjusting the carb.

.

 

[Trey]

Turned out to need a deep well, very thin wall socket. The belt sander made the one I had thin enough. I forget the size- will post it later.

 

[Trey]

Well, I should have posted that when I could. I'm out of that business, and everything's gone. Sorry.