Stihl MS 461 - Setting

85MS 461, MS 461-R
Version without limiter caps
For the sake of clarity the adjusting
screws are shown on the exposed
carburetor.
Carry out adjustments with
screwdriver (1) 5910 890 2305.
: Starting with the high speed
screw (H) and low speed
screw (L) against their seats,
open them each 1full turn.
– Go to "Setting", b 12.6.2
12.6.2 Setting
Version with limiter caps
– Push screwdriver
5910 890 2304 through the
grommet and the pre-installed
limiter caps of high speed
screw (H) and low speed
screw (L).
Version without limiter caps
– Push screwdriver
5910 890 2305 through the
grommet and into the low speed
screw (L) and high speed
screw (H).
3443RA492 TG
1
All versions
Adjust engine speeds with
tachometer or STIHL MDG 1 engine
analyzer (select "Other STIHL
Products" / "Tachometer"). Adjust
specified engine speeds within a
tolerance of ± 200 rpm.
– Start the engine and warm it up
for 1minute at varying speeds. If
necessary, turn idle speed
screw (LA) slowly clockwise until
the engine runs smoothly – the
saw chain must not rotate.
Adjusting idle speed
1. Turn the low speed screw (L)
counterclockwise or clockwise
to obtain the highest engine idle
speed.
If this speed is between 2,900 rpm
and 3,100 rpm, continue with
step 3.
If this speed is outside the range
between 2,900 rpm and 3,100 rpm,
continue with step 2.
2. Use the idle speed screw (LA)
to set engine speed to
3,000 rpm and repeat step 1.
3. Turn the low speed screw (L)
to set engine speed to
2,500 rpm.
4. Use the high speed screw (H)
to set engine speed to
13,000 rpm.
5. Remove tachometer after
obtaining engine speed of
13,000 rpm.
Turn high speed screw (H)
another 1/8 turn clockwise
(leaner), a maximum engine
speed of 13,500 rpm is obtained
– making the setting any leaner
increases the risk of engine
damage.
The ignition module limits maximum
engine speed to 13,500 rpm. For
this reason the maximum
permissible engine speed cannot be
adjusted with a tachometer.
– Continue with "Securing limiter
caps".
Securing limiter caps
: Insert a suitable punch through
the holes (arrows) in the grommet
and push the limiter caps home
as far as stop.
This completes the basic setting of
the high speed screw (H) and the
low speed screw (L).
Version without limiter caps: The
high speed screw (H) and the low
speed screw (L) are now set.
3443RA329 TG