Tensioning The Saw Chain (Side Chain Tensioner); Checking Chain Tension; Fuel - Stihl MS 193 Instruction Manual

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Tensioning the Saw Chain
(side chain tensioner)
1
Retensioning during cutting work:
Switch off the engine.
N
Loosen the nut.
N
Hold the bar nose up.
N
Use a screwdriver to turn the
N
tensioning screw (1) clockwise until
the chain fits snugly against the
underside of the bar.
While still holding the bar nose up,
N
tighten down the nut firmly.
Go to "Checking Chain Tension".
N
A new chain has to be retensioned more
often than one that has been in use for
some time.
Check chain tension frequently –
N
see chapter on "Operating
Instructions".
20

Checking Chain Tension

Shut off the engine.
N
Wear work gloves to protect your
N
hands.
The chain must fit snugly against
N
the underside of the bar and it must
still be possible to pull the chain
along the bar by hand when the
chain brake is released.
If necessary, retension the chain.
N
A new chain has to be retensioned more
often than one that has been in use for
some time.
Check chain tension frequently –
N
see chapter on "Operating
Instructions".

Fuel

Your engine requires a mixture of
gasoline and engine oil.
WARNING
For health reasons, avoid direct skin
contact with gasoline and avoid inhaling
gasoline vapor.
STIHL MotoMix
STIHL recommends the use of STIHL
MotoMix. This ready-to-use fuel mix
contains no benzol or lead, has a high
octane rating and ensures that you
always use the right mix ratio.
STIHL MotoMix uses STIHL HP Ultra
two-stroke engine oil for an extra long
engine life.
MotoMix is not available in all markets.
Mixing Fuel
NOTICE
Unsuitable fuels or lubricants or mix
ratios other than those specified may
result in serious damage to the engine.
MS 193 C