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Clean the dust and dirt off the machine –
do not use any grease solvents for this
purpose.
Clean the ventilation slots if necessary.
Do not use a high-pressure cleaner to
clean the machine. The hard jet of water
can damage parts of the machine.
Accessories
Only use those tools, guide bars, chains,
chain sprockets, accessories or
technically equivalent components that
have been approved by STIHL for this
machine. If you have any questions in
this respect, consult a servicing dealer.
Use only high quality tools and
accessories. Otherwise, there may be a
risk of accidents and damage to the
machine.
STIHL recommends the use of genuine
STIHL tools, guide bars, chains, chain
sprockets and accessories. They are
specifically designed to match your
model and meet your performance
requirements.
Refuelling
Gasoline is an extremely
flammable fuel – keep
clear of naked flames and
fire – do not spill any fuel
– no smoking.
Switch off the engine before refuelling.
Never refuel the machine while the
engine is still hot – the fuel may spill over
– risk of fire!
MS 251 C-Q
Open the fuel filler cap carefully so that
any excess pressure is relieved
gradually and fuel does not splash out.
The machine may only be refuelled in a
well ventilated place. Clean the machine
immediately if fuel is spilled. Do not spill
fuel over your clothing – contaminated
clothing must be changed immediately.
The machines can be equipped with the
following filler caps as standard:
Cliplock filler cap (bayonet-type)
Place the cliplock filler
cap (bayonet-type) in
position, turn as far as
stop and fold the cliplock
down.
This helps reduce the risk of unit
vibrations causing an incorrectly
tightened filler cap to loosen or come off
and spill quantities of fuel.
Look out for leaks! Never
start the engine if fuel has
been spilled or is leaking
– Fatal burns may result!
Before Starting Work
Check that your saw is properly
assembled and in good condition – refer
to appropriate chapters in the instruction
manual.
Check the fuel system for leaks,
–
paying special attention to visible
parts such as the tank cap, hose
connections and the manual fuel
pump (on machines so equipped). If
there are any leaks or damage, do
not start the engine – risk of fire.
Have your saw repaired by a
servicing dealer before using it
again.
Check operation of chain brake,
–
front hand guard
Correctly mounted guide bar
–
Correctly tensioned chain
–
The trigger and trigger lockout must
–
move freely and spring back to the
idle position when they are
released.
Master Control lever must move
–
easily to STOP, 0 or †
Check that the spark plug boot is
–
secure – a loose boot may cause
arcing that could ignite combustible
fumes and cause a fire.
Never attempt to modify the controls
–
or safety devices in any way.
Keep the handles dry and clean –
–
free from oil and dirt – for safe
control of the saw.
Make sure there is sufficient fuel
–
and chain oil in the tanks.
To reduce the risk of personal injury, do
not operate your saw if it is damaged or
not properly assembled.
Starting the chain saw
Always work on a level surface. Ensure
a firm and secure footing. Hold the
machine securely – the chain must not
touch any objects or the floor – danger of
injury due to the rotating saw chain.
English
5
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