Fuel - Stihl FS 80 Instruction Manual

: Place the cutting tool (8) on the
thrust plate (9).
Collar (see arrows) must locate in
cutting tool's mounting hole.
: Slip thrust washer (10) and rider
plate (11) over the output shaft (12).
: Block the output shaft.
: Screw the mounting nut (13) on to
the output shaft counterclockwise
and use the combination wrench
(14) to tighten it down firmly.
If the mounting nut is too loose,
fit a new one.
Removing metal cutting tools
: Block the output shaft.
: Unscrew the nut clockwise.
: Take the parts off the shaft – but do
not remove the thrust plate (9).
FS 80, FS 80 R, FS 85, FS 85 R

Fuel

Your engine requires a mixture of
gasoline and engine oil.
For health reasons, avoid direct skin
contact with gasoline and avoid inhaling
gasoline vapor.
STIHL MotoMix
STIHL recommends the use of STIHL
MotoMix. This ready-to-use fuel mix
contains no benzol or lead, has a high
octane rating and ensures that you
always use the right mix ratio.
STIHL MotoMix is specially
formulated for use in STlHL engines
and guarantees a long engine life.
MotoMix is not available in all markets.
Mixing Fuel
Unsuitable fuels or lubricants or mix
ratios other than those specified
may result in serious damage to the
engine. Poor quality gasoline or
engine oil may damage the engine,
sealing rings, hoses and the fuel
tank.
Gasoline
Use only high-quality brand-name
gasoline with a minimum octane rating
of 90 – leaded or unleaded.
If your machine is equipped with a
catalytic converter, you must use
unleaded gasoline.
A few tankfuls of leaded gasoline
will greatly reduce the efficiency of
the catalytic converter.
Engine Oil
Use only quality two-stroke engine oil.
We recommend STIHL two-stroke
engine oil since it is specially
formulated for use in STlHL engines
and guarantees a long engine life.
If STIHL two-stroke engine oil is not
available, use only quality two-stroke oil
designed for use in air cooled engines.
Do not use oils designed for water
cooled engines or engines with a
separate lubricating system (e.g.
conventional four-stroke engines).
Use only STIHL 50:1 two-stroke
engine oil for the fuel mix in models with
a catalytic converter.
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