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A
DOLMAR HP 100 high-performance two-stroke engine oil is
available in the following sizes:
0.5 l order number 980 008 109
DOLMAR high-performance two-stroke engine oil is available
in the following sizes to suit your individual requirements:
1 l order number 980 008 107
100 ml order number 980 008 106
In case DOLMAR high-performance two-stroke engine oil is not
available, it is urgently recommended to use a mixture ratio of
40:1 with other two-stroke engine oils, as otherwise optimum
operation of the engine cannot be guaranteed.
The correct mixture ratio:
50:1 when using DOLMAR high-performance two-stroke en-
gine oil, i. e. mix 50 parts gasoline with 1 part oil.
100:1 when using DOLMAR HP 100 high-performance two-
stroke engine oil, i. e. mix 100 parts gasoline with 1 part
oil.
40:1 when using other two-stroke engine oils, i. e. mix 40
parts gasoline with 1 part oil.
NOTE: For preparing the fuel-oil mixture first mix the entire oil
quantity with half of the fuel required, then add the remaining
fuel. Thoroughly shake the mixture before filling it into the chain
saw tank.
It is not wise to add more engine oil than specified to
ensure safe operation. This will only result in a higher
production of combustion residues which will pollute the
environment and clog the exhaust channel in the cylinder
as well as the muffler. In addition, fuel consumption will
rise and performance will decrease.
The Storage of Fuel
Fuels have a limited storage life. Fuel and fuel mixtures age.
Therefore fuel and fuel mixtures, which have been stored for
too long, can cause starting problems. Purchase only that
amount of fuel, which will be consumed over the next few
months.
Store fuel safely in a dry place in approved containers only.
Fuel mixture
The engine of the chain saw is a high-efficiency two-stroke engine.
It runs on a mixture of gasoline and two-stroke engine oil.
The engine is designed for unleaded regular gasoline with a
min. octane value of 91 ROZ. In case no such fuel is available,
you can use fuel with a higher octane value. This will not affect
the engine.
In order to obtain an optimum engine output and to protect
your health and the environment use unleaded fuel only.
Gasoline which contens alcohol should not used in
DOLMAR products.
For lubricating the engine use a two-stroke engine oil (quality
grade: JASO FC or ISO EGD), which is added to the fuel. The
engine has been designed for use of DOLMAR HP 100 high-
performance two-stroke engine oil and a mixture ratio of only
100:1 to protect the environment. In addition, a long service life
and reliable operation with a minimum emission of exhaust
gases are ensured.
Fuel / Refuelling
Chain brake
Engaging the chain brake (braking)
If the kickback is strong enough the sudden acceleration of the
guide bar combined with the inertia of the hand guard (B/3) will
automatically actuate the chain brake.
To engage the chain brake manually, simply push the hand
guard (B/3) forward (towards the tip of the saw) with your left
hand (arrow 1).
Releasing the chain brake
Pull the hand guard (B/3) towards you (arrow 2) until you feel
it catch. The brake is now released.
B
2
1
3
The DOLMAR models PS-340, 341, 400, 401 comes with an
inertia chain brake as standard equipment. If kickback occurs
due to contact of the guide-bar tip with wood (see SAFETY
PRECAUTIONS, page 11), the chain brake will stop the chain
through inertia if the kickback is sufficiently strong. The chain
will stop within a fraction of a second.
The chain brake is installed to block the saw chain before
starting it and to stop it immediately in case of an emergen-
cy.
IMPORTANT: NEVER run the saw with the chain brake
activated (except for testing, see “Checking the chain brake”)!
Doing so can very quickly cause extensive engine
damage!
ALWAYS release the chain brake before starting
the work!
1.0 Us-gal. (3.7 l)
3.2 floz.(94 cm
3
) 2.5 floz.(75 cm
3
) 1.3 floz.(38 cm
3
)
2.5 Us-gal. (9.4 l)
8.0 floz.(236 cm
3
) 6.4 floz.(189 cm
3
) 3.2 floz.(94 cm
3
)
5.0 Us-gal. (18.9 l)
16.0 floz.(473 cm
3
) 12.8 floz.(378 cm
3
) 6.4 floz.(189 cm
3
)
100:1
Gasoline
40:1
50:1
OIL
HP 100
+
other oil DOLMAR oil DOLMAR oil
OIL
50:1
DOLMAR
21


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