Stihl MS 201 Manual page 107

: Insert screwdriver (1)
5910 890 2306 through the
opening (arrow) and into the low
speed screw L and high speed
screw H
– push the screwdriver through
the pre-installed limiter cap on
the high speed screw H.
Warm up the engine before making
adjustments. Then run engine for 20
seconds at idle speed.
Do not make any adjustments
during this period – the ignition
system maps the idle speed data.
Adjust idle speed with a tachometer.
Adjust specified engine speeds
within a tolerance of ± 200 rpm.
1. Adjust engine speed with
idle speed screw (LA)
to 2800 rpm.
2. Turn the
low speed screw (L)
counterclockwise or clockwise
to obtain
maximum engine speed.
If this speed is higher than
3,300 rpm, abort the procedure and
start again with step 1.
3. Use the idle speed screw (LA)
to set the engine speed again to
3,300 rpm.
106
4. Turn the low speed screw (L)
1
counterclockwise to set engine
speed to 2,800 rpm.
5. Use the idle speed screw (LA)
to set engine speed to
3,000 rpm.
6. Use the high speed screw (H)
to set engine speed to
14,000 rpm – starting from the
basic setting.
Do not make any leaner after
maximum engine speed is reached
– the ignition module limits
maximum engine speed to
about 14,000 rpm.
The maximum permissible engine
speed cannot be increased by
making the mixture any leaner – an
overlean mixture increases the risk
of engine damage.
Checking position of limiter cap
Notch (arrow) in limiter cap (1) must
point vertically upwards.
: If necessary, use a suitable
screwdriver to rotate the limiter
cap (1) counterclockwise as far
as stop – the notch (arrow) is at
the top.
Securing the limiter cap
: Insert a drift through the opening
(arrow) and then push home the
limiter cap until it engages.
This completes the basic setting of
the high speed screw H and the low
speed screw L.
The setting of the high speed
screw (H) is fixed when the limiter
cap (1) is recessed about 2 mm in
1
the carburetor body.
MS 201, MS 201 C, MS 201 T, MS 201 TC
1