25MS 461, MS 461-R
6. Engine
6.1 Muffler
Always check and, if necessary,
repair the fuel system, carburetor,
air filter and ignition system before
looking for faults on the engine.
– Troubleshooting, b 3
To ensure that no dirt particles enter
the cylinder, set the piston to top
dead center before removing the
muffler – top dead center is reached
when the magnet poles on the
flywheel face upwards.
Rescue saw only
: Take out the screw (1) – hold the
hex nut steady.
: Take out the screw (2) and
remove together with the chain
catcher (3).
: Take out the screw (4) with
washer (5) and remove the guard
plate (6).
2
6
3443RA008 TG
3
1
5
4
All versions
: Take out the screws (1) and (2)
and special screw (3).
Special screw (3) is fitted only on
the rescue saw. Screw (2) is used at
the bottom left and right on all other
models.
: Remove the top casing (4),
check it and replace if necessary.
All versions
: Remove the gasket (1) and take
out the screws (2)
– always install a new gasket.
– Remove and inspect the muffler
and replace it if necessary.
4
3443RA010 TG
1
3
2
1
3443RA011 TG
1
2
2
: Remove the muffler gasket (1)
and heat shield (2).
– Remove and install the spark
arresting screen – see instruction
manual.
Installing
– Position the machine upright.
– Cover the exhaust port. Remove
any dirt from around the cylinder
and exhaust port.
: Check and clean the sealing
faces (arrows) on exhaust port,
heat shield and muffler, remove
any gasket residue – make sure
there is no gasket residue or dirt
particles in the exhaust port.
Always replace components with
damaged sealing faces.
3443RA012 TG
1
2
3443RA013 TG
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