Instruction Manual

FS 70 C, FS 70 RC
English
27
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.
NOTICE
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.
The carburetor has been set at the
factory to provide an optimum fuel-air
mixture under most operating
conditions.
Adjusting Idle Speed
Engine stops while idling
N Warm up the engine for about
3 minutes.
N Turn the idle speed screw (LA)
slowly clockwise until the engine
runs smoothly – the cutting
attachment must not run.
Cutting attachment runs when engine is
idling
N Turn the idle speed screw (LA)
counterclockwise until the cutting
attachment stops moving and then
rotate the screw another 1/2 to 3/4
turn in the same direction.
WARNING
If the cutting attachment continues to run
when the engine is idling, have your
machine checked and repaired by your
servicing dealer.
N If the engine is down on power,
difficult to start or runs poorly at idle
speed, first check the spark plug.
N Fit a new spark plug after about 100
operating hours – or sooner if the
electrodes are badly eroded. Install
only suppressed spark plugs of the
type approved by STIHL – see
"Specifications".
Removing the Spark Plug
N Shut off the engine.
N Remove the spark plug boot (1).
N Unscrew the spark plug (2).
547BA023 KN
4
Adjusting the Carburetor
0815BA006 KN
Spark Plug
2
0414BA015 KN
1