Stihl FS 80 Instruction Manual - Page 32

Removing cutting tool

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Fuel English / USA : Place the cutting tool (6) on the thrust plate (7). Collar (see arrows) must locate in cutting tool's mounting hole. : Slip thrust washer (8) and rider plate (9) over the output shaft (10). : Block the output shaft and : Screw the mounting nut (11) with the combination wrench (12) onto the output shaft counterclockwise and tighten down firmly. If the mounting nut is too loose, fit a new one. Removing cutting tool : Block the output shaft. : Unscrew the nut clockwise. : Removing the cutting tool - do not remove the thrust plate (7). This engine is certified to operate on unleaded gasoline and the STIHL twostroke engine oil at a mix ratio of 50:1. Your engine requires a mixture of highquality gasoline and quality two-stroke air cooled engine oil. 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. 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! Use only STIHL two-stroke engine oil or equivalent high-quality two-stroke engine oils that are designed for use only in air cooled two-cycle engines. We recommend STIHL 50:1 two-stroke engine oil since it is specially formulated for use in STlHL engines. Do not use BIA or TCW rated (twostroke water cooled) mix oils or other mix oils that state they are for use in both water cooled and air cooled engines (e.g., outboard motors, snowmobiles, chainsaws, mopeds, etc.). Take care when handling gasoline. Avoid direct contact with the skin and avoid inhaling fuel vapor. When filling at the pump, first remove the canister from your vehicle and place the canister on the ground before filling. Do not fill fuel canisters that are sitting in or on a vehicle. The canister should be kept tightly closed in order to avoid any moisture getting into the mixture. The machine's fuel tank and the canister in which fuel mix is stored should be cleaned as necessary. FS 80, FS 80 R, FS 85, FS 85 R 31

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31
FS 80, FS 80 R, FS 85, FS 85 R
English / USA
:
Place the cutting tool
(6)
on the
thrust plate
(7)
.
Collar
(see arrows)
must locate in
cutting tool’s mounting hole.
:
Slip thrust washer
(8)
and rider
plate
(9)
over the output shaft
(10)
.
:
Block the output shaft and
:
Screw the mounting nut
(11)
with
the combination wrench
(12)
onto
the output shaft counterclockwise
and tighten down firmly.
If the mounting nut is too loose,
fit a new one.
Removing cutting tool
:
Block the output shaft.
:
Unscrew the nut clockwise.
:
Removing the cutting tool –
do not
remove the thrust plate
(7)
.
This engine is certified to operate on
unleaded gasoline and the STIHL two-
stroke engine oil at a mix ratio of 50:1.
Your engine requires a mixture of high-
quality gasoline and quality two-stroke
air cooled engine oil.
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.
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!
Use only STIHL two-stroke engine oil or
equivalent high-quality two-stroke
engine oils that are designed for use
only in air cooled two-cycle engines.
We recommend
STIHL 50:1 two-stroke
engine oil since it is specially formulated
for use in STlHL engines.
Do not use BIA or TCW rated (two-
stroke water cooled) mix oils or other
mix oils that state they are for use in both
water cooled and air cooled engines
(e.g., outboard motors, snowmobiles,
chainsaws, mopeds, etc.).
Take care when handling gasoline.
Avoid direct contact with the skin and
avoid inhaling fuel vapor. When filling at
the pump, first remove the canister from
your vehicle and place the canister on
the ground before filling. Do not fill fuel
canisters that are sitting in or on a
vehicle.
The canister should be kept tightly
closed in order to avoid any moisture
getting into the mixture.
The machine‘s fuel tank and the canister
in which fuel mix is stored should be
cleaned as necessary.
Fuel