Checking Chain Tension; Fuel - Stihl MS 341 Instruction Manual

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Checking Chain Tension

N Shut off the engine.
N Wear work gloves to protect your
hands.
N The chain must fit snugly against
the underside of the bar and it must
still be possible to pull the chain
along the bar by hand.
N If necessary, retension the chain.
A new chain has to be retensioned more
often than one that has been in use for
some time.
N Check chain tension frequently –
see chapter on "Operating
Instructions".
68

Fuel

Your engine requires a mixture of
gasoline and engine oil.
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 is specially formulated
for use in STIHL engines and
guarantees a long engine life.
MotoMix is not available in all markets.
Mixing Fuel
Unsuitable fuels or lubricants or
mix ratios other than those
specified may result in serious
damage to the engine. Poor
quality gasoline or engine oil may
damage the engine, sealing rings,
hoses and the fuel tank.
Gasoline
Use only high-quality brand-name
gasoline with a minimum octane rating
of 90 – leaded or unleaded.
If your machine is equipped with a
catalytic converter, you must use
unleaded gasoline.
A few tankfuls of leaded gasoline
will greatly reduce the efficiency of
the catalytic converter.
Engine Oil
Use only quality two-stroke engine oil.
We recommend STIHL two-stroke
engine oil since it is specially
formulated for use in STIHL engines
and guarantees a long engine life.
If STIHL two-stroke engine oil is not
available, use only quality two-stroke oil
designed for use in air-cooled engines.
Do not use oils designed for water-
cooled engines or engines with a
separate lubricating system (e.g.
conventional four-stroke engines).
Use only STIHL 50:1 two-stroke
engine oil for the fuel mix in models with
a catalytic converter.
Mix Ratio
STIHL 50:1 two-stroke engine oil: 50
parts gasoline to 1 part oil
Examples
Gasoline STIHL engine oil 50:1
Liters Liters (ml)
1 0,02 (20)
5 0,10 (100)
10 0,20 (200)
15 0,30 (300)
20 0,40 (400)
25 0,50 (500)
Other brand-name two-stroke
engine oils: 25 parts gasoline to 1
part oil
MS 341, MS 361, MS 361 C