Stihl MS 210 Service Manual page 62

11.2.3 Adjusting
(Carburetor without
Limiter Cap)
Standard setting
(without tachometer)
To readjust the carburetor, start with
the standard setting.
– Carefully screw down both
adjusting screws (H and L) until
they are against their seats.
Then make the following
adjustments:
– Open high speed screw (H)
one full turn.
– Open low speed screw (L)
one full turn.
If no tachometer is available, do not
turn the high speed screw (H)
beyond the standard setting to
make the mixture leaner.
MS 210, MS 230, MS 250
Standard setting
(with tachometer)
– Check the air filter and clean or
replace as necessary.
– Check chain tension.
– Warm up the engine.
– Adjust idle speed.
Adjusting engine idle speed
– Adjust idle speed with a
tachometer. Adjust specified
engine speeds within tolerance
of +/- 200 rpm.
1. Adjust engine speed with idle
speed screw (LA) to 3,300 rpm.
2. Turn low speed screw (L)
clockwise or counterclockwise
to obtain maximum engine
speed.
If this speed is higher than
3,700 rpm, abort the procedure and
start again with step 1.
3. Use the idle speed screw (LA)
to set engine speed again to
3,300 rpm.
4. Set the engine speed to
2,800 rpm with the low speed
screw (L).
Starting from the standard setting,
use the high speed screw (H) to
adjust the maximum engine speed
to:
12,500 rpm (MS 210)
14,000 rpm (MS 230, 250)
If the setting is too lean there is a
risk of engine damage due to
insufficient lubrication and
overheating.
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