English / USA
Fuel
This engine is certified to operate on
unleaded gasoline and the STIHL two-
stroke engine oil at a mix ratio of 50:1.
4
4
Your engine requires a mixture of high-
quality gasoline and quality two-stroke
air cooled engine oil.
3
3
3
5
5
Use mid-grade unleaded gasoline with a
minimum octane rating of 89 (R+M/2). If
the octane rating of the mid-grade
gasoline in your area is lower, use
premium unleaded fuel.
2
1
2
1
Fuel with a lower octane rating may
increase engine temperatures. This, in
turn, increases the risk of piston seizure
and damage to the engine.
The chemical composition of the fuel is
also important. Some fuel additives not
only detrimentally affect elastomers
(carburetor diaphragms, oil seals, fuel
lines, etc.), but magnesium castings and
catalytic converters as well. This could
cause running problems or even
damage the engine. For this reason
STIHL recommends that you use only
nationally recognized high-quality
unleaded gasoline!
Grass cutting blade 255-8
Brush knife 350-3
Brush knife 350-3 "Special"
Circular saw blades 225
Circular saw blade 230
Circular saw blade 250
:
Place the cutting tool (1) in position.
For sawing:
Collar (see arrow) must engage the
cutting tool’s mounting hole.
:
:
:
Fit rider plate (5) for sawing.
Block the output shaft.
Cutting edges on grass cutting blade
and the circular saw blades must
point clockwise.
Screw on nut (4) counterclockwise
and tighten down firmly.
255-8
Removing the cutting tool
:
Fit thrust washer (2) – convex side
must face up.
:
:
Block the output shaft.
Unscrew the nut clockwise.
For mowing:
If the mounting nut is too loose (cannot
be tightened properly), fit a new one.
:
Fit rider plate (3) for mowing.
FS 500, FS 550
23
| Categories | Blower Vacuum and Sweeper Manuals, STIHL Trimmer Manuals, Trimmer Manuals |
|---|---|
| Tags | STIHL FS 500, STIHL FS 550 |
| Download File |
|
| Language | English, Español |
| Product Brand | STIHL. Stihl Inc, USA - Corporate phone: (757) 486-9100. International Support Information: http://stihl.com Email: info@stihl.com, Trimmer |
| Document File Type | |
| Publisher | stihl.com |
| Wikipedia's Page | Stihl |
| Copyright | Attribution Non-commercial |
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