Stihl does not make parts or service available at their website though dealers have secure access through a different site also availble to students through applying for guest access.
One site has a few manuals available. The line trimmers are FS models with three engines used in recent years; the 4137, 4140 and 4180. Hedge trimmers are HS model with comparable engines though the crankshaft is often applicatio-specific.
Check the link below.
50 TO 189 octane
Depends on the Model of stihl trimmer you have. The 45 home trimmer from stihl takes .080 but from that model to the larger more expensive ones the string size gets larger.
Go to your nearest stihl specialist dealer
a dealer that sells stihl or maybe online
China
The best electric string trimmer based on the consumer report is the Stihl FSE 60. They say it can handle as tough of weeds as any gas trimmer but you do have to contend with the chord. For a 2 stroke string trimmer, the best one is Echo SRM-225. It is light and tough on weeds.
0.020"
Certain models of Stihl grass trimmers are designed to run on gasoline and can be used with up to a 10% (E10) blend of ethanol in the gasoline/engine oil mix, although it is important not to exceed this limit.
shema motora
To lubricate the shaft of a Stihl FS-46 trimmer, apply Reynolds lubricant to the shaft. Rotate the shaft and pull the converging wedge between the shaft and the bearing.
The Troy Bilt 2 Cycle Gas Trimmer uses quite a bit of gas.
what is the gas/oil mix for the 24cc weed trimmer by craftsman