Stihl FS-81

[Will_C]

I have a chance to buy a FS-81 trimmer. Can anyone tell me how old this unit is, and what size motor it has? What is it comparable to; a modern FS 110 or 130, 250, etc.
Thanks,
Will

 

[Bird]

Will, I just went to stihlusa.com and using their search function for the "FS 81", it found one document, which in turn led me to manuals, and I downloaded the 46 page manual for the FS 81, 86, 106. Page 43 shows it to be 22.5 cm, (1.37 cu. in.) engine, 32mm bore, 28mm stroke. That would appear to be a smaller engine than most of the current models, but that doesn't necessarily mean it's not a good machine.

 

[Will_C]

Bird,
Thanks. I saw this trimmer on Craig's list for $150, and it appeared in good shape. It is so confusing to try and figure out Stihl trimmer numbers-my father had a FS-76 that was a real beast of a machine (I'd like one like it for some new chores I have), but this 81 is actually smaller than the FS-85 I currently own.
Thanks. You saved me a call or a trip.
Will

 

[carmanrj]

I have a chance to buy a FS-81 trimmer. Can anyone tell me how old this unit is, and what size motor it has? What is it comparable to; a modern FS 110 or 130, 250, etc.
Thanks,
Will

I have a FS 81 i Bought in 1989 so mid to late 80s. I am looking for a gearhead box for mine if u know of any. You can no longer buy some of these beasts. Mine was the best weedeater I have ever owned but you can no longer buy many of the parts to fix it.