Stihl FC 70 Product Instruction Manual - Page 24

Engine Management, Adjusting the Carburetor

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547BA023 KN 547BA024 KN English 4 N Reach into the recess (4) in the filter housing and take out the felt filter (5). N Fit a new felt filter element (5). As a temporary measure you can knock it out on the palm of your hand or blow it out with compressed air. Do not wash. Replace damaged parts. N Fit the felt filter (5) in the filter housing, make sure it is properly seated - the arrow points to the recess. N Move the choke lever (1) to

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FC 70 C
English
22
N
Reach into the recess
(4) in the filter
housing and take out the felt
filter (5).
N
Fit a new felt filter element (5). As a
temporary measure you can knock it
out on the palm of your hand or blow
it out with compressed air. Do not
wash.
Replace damaged parts.
N
Fit the felt filter (5) in the filter
housing, make sure it is properly
seated – the arrow points to the
recess.
N
Move the choke lever (1) to
<
.
N
Fit the filter cover in position,
making sure the screw is square.
Tighten down the screw.
Exhaust emissions are controlled by the
design of the fundamental engine
parameters and components (e.g.
carburation, ignition, timing and valve or
port timing) without the addition of any
major hardware.
The carburetor comes from the factory
with a standard setting.
This setting provides an optimum fuel-air
mixture under most operating
conditions.
With this carburetor it is only possible to
make corrections with the adjusting
screws within fine limits.
Standard Setting
N
Shut off the engine.
N
Mount the cutting blade, check it
and clean it if necessary (it must be
clean and not warped).
N
Check the air filter and replace the
element if necessary.
N
Have the spark arresting screen
(not all markets) checked – see
“Inspection and Maintenance by
Dealer"
N
Turn the high speed screw (H)
counterclockwise as far as stop
(max. 3/4 turn possible).
N
Turn the low speed screw (L)
counterclockwise as far as stop
(max. 3/4 turn possible).
547BA023 KN
4
Engine Management
Adjusting the Carburetor
547BA024 KN