Question about Oregon Scientific Complete Carburetor for Stihl 4122 Brush Cutter and 4226HS Hedge Trimmer

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Instruction on how to rebuild Stihl FS85 carburetor

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The FS 85 was produced in HUGE quantities over a number of years. Several different carbs were used during production and Stihl has several proprietary carbs in use. You will need a Rebuild Kit (NOT just a Diaphragm Kit) for this particular carb. On the carb body you should see a Series and a Model identification.
Example: If this is a ZAMA carburetor, the C1U-S66 might have been used on your trimmer.
Get that info off the carb body and ...
For ZAMA carb lookups click HERE.
For WALBRO carbs click HERE.

Hope this helps.

Posted on Oct 04, 2009

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