Adjusting The Carburetor; General Information - Stihl SP 200 Manual De Instrucciones

English / USA

Adjusting the Carburetor

L
H
1
LA

General Information

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
adjust the high speed screw within fine
limits.
Adjustments may only be performed
when the machine is completely
and securely assembled.
26
Standard Setting
: Shut off the engine.
: Check the air filter and replace if
necessary.
: Check adjustment of throttle cable
and readjust if necessary – see
"Adjusting the Throttle Cable".
Turn the high speed screw (H)
counterclockwise as far as stop
3
– max. / turn
4
: Carefully turn the low speed screw
(L) down onto its seat clockwise.
Then open it one turn
counterclockwise.
: Start and warm up the engine.
: Adjust idle speed with the idle speed
screw (LA) so that the hook does
not move.
Fine Tuning for Different
Operating Conditions
A slight correction of the setting of the
high speed screw (H) may be necessary
if engine power is not satisfactory when
operating at high altitude or at sea level.
Rule of thumb
Turn the high speed screw (H)
about one eighth turn for every
3300 ft (1000m) change in altitude.
Conditions for adjustment
: Carry out standard setting.
: Warm up the engine for about 5
minutes.
: Open the throttle wide.
At high altitude
: Turn the high speed screw (H)
clockwise (leaner), no further than
stop, until there is no noticeable
increase in engine speed.
SP 200