Engaging And Disengaging The Chain Brake; Mixing Fuel And Refueling The Chainsaw - Stihl MS 400 C-M Instruction Manual

7 Engaging and Disengaging the Chain Brake

► Place the spiked bumper (1) in position.
► Fit the screw (2).
► Insert screw (3) through spiked bumper and
nut (4).
► Tighten down the screws (2) and (3) firmly.
The spiked bumper (1) must not be removed.
7 Engaging and Disengaging
the Chain Brake
7.1 Engaging the Chain Brake
The saw is equipped with a chain brake.
The chain brake is activated by the inertia of the
front hand guard if the kickback force is high
enough or can be engaged by the operator.
► Push the hand guard away from the front han‐
dle with your left hand.
The hand guard engages with an audible click.
The chain brake is engaged.
7.2 Disengaging the Chain Brake
► Pull the hand guard toward the front handle
with your left hand.
The hand guard engages with an audible click.
The chain brake is disengaged.
8 Mixing Fuel and Refueling
the Chainsaw
8.1 Mixing Fuel
This chainsaw requires a fuel mixture of gasoline
and two-stroke engine oil in a ratio of 50:1.
STIHL recommends you use STIHL MotoMix.
0458-788-0121-B
If you mix the fuel yourself, use only STIHL two-
stroke engine oil or another high-performance
engine oil in accordance with JASO FB, JASO
FC, JASO FD, ISO-L-EGB, ISO-L-EGC or ISO-L-
EGD.
STIHL specifies STIHL HP Ultra two-stroke
engine oil or an equivalent high-performance
engine oil in order to maintain emission limits
throughout the machine's service life.
► Make sure that the octane number of the gas‐
oline is at least 90 RON and the ethanol con‐
tent is not more than 10%.
► Make sure the two-stroke engine oil you are
using meets the requirements.
► Depending on the required amount of fuel,
determine the correct amounts of two-stroke
engine oil and gasoline in a mix ratio of 50:1.
Examples for fuel mixes:
– 1 liter gasoline, 20 ml two-stroke engine oil
– 3 liters gasoline, 60 ml two-stroke engine oil
– 5 liters gasoline, 100 ml two-stroke engine
oil
► Pour two-stroke engine oil into a clean
approved fuel canister first and then add gaso‐
line.
► Thoroughly mix the fuel.
8.2 Fueling the Saw
► Shut off the engine and engage the chain
brake.
► Allow chainsaw to cool down.
► Place your chainsaw on a level surface so that
the fuel tank cap faces up.
► Use a damp cloth to clean the tank cap and
the area around it.
► Swing the grip on the fuel tank cap to the verti‐
cal position.
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