Refueling The Chain Saw - Stihl MS 462 C-M Instruction Manual

English
Gasoline with an ethanol content of more than 10% can
cause running problems and major damage in engines and
should not be used. For further details, see
www.STIHLusa.com/ethanol.
The ethanol content in gasoline affects engine speed. It may
be necessary to readjust the carburetor if you use fuels with
varying ethanol content.
The idle speed and maximum speed of the engine change if
you switch to a fuel with a much higher or lower ethanol
content. This problem can be avoided by always using an
ethanol-free fuel or fuel with consistent ethanol levels.
STIHL MotoMix
STIHL MotoMix is ethanol-free, has a high octane rating and
ensures that you always use the right gasoline/oil mix ratio.
STIHL MotoMix uses STIHL HP Ultra 2-Cycle Engine Oil
suited for high performance engines. For further details, see
www.STIHLusa.com/ethanol.
STIHL recommends using MotoMix in your chain saw. If not
using MotoMix, use only STIHL HP Ultra 2-Cycle Engine Oil
or equivalent high quality 2-cycle engine oils that are
designed for use in air cooled 2-cycle engines.
The use of non-seasonal gasoline blends may increase the
potential for pressure to build in the fuel tank during
operation. For example, using a winter blend during the
summer will increase pressure in the fuel tank. Always use
gasoline blends appropriate to the season, altitude and
other environmental factors.
Do not use BIA or TCW rated (2-cycle water cooled) mix oils
or other mix oils that state they are for use in both water
cooled and air cooled engines (e.g., outboard motors,
snowmobiles, chain saws, mopeds, etc.).
Mixing Fuel
WARNING
Take care when handling gasoline. Avoid direct contact with
the skin and avoid inhaling fuel vapor. Anytime you are filling
a container at the fuel pump, remove the container from your
vehicle and place it on the ground before filling. To reduce
40
13 Mixing Fuel and Refueling the Chain Saw
the risk of sparks from static discharge and resulting fire
and/or explosion, do not fill fuel containers that are sitting in
or on a vehicle or trailer.
WARNING
Shaking fuel can cause pressure to build in the fuel
container. To reduce the risk of fire and severe personal
injury or property damage from fuel spraying, allow the fuel
container to sit for several minutes before opening. Open the
container slowly to release any residual pressures. Never
open the fuel container in the vicinity of any ignition source.
Read and follow all warnings and instructions that
accompany your fuel container.
To properly mix fuel:
► If not using STIHL MotoMix, only mix sufficient fuel for a
few days of work. Never mix more than a 30-day supply of
fuel.
► Store the fuel mix in an approved fuel container.
► Depending on the required amount of fuel, determine the
correct amounts of 2-cycle engine oil and gasoline in a mix
ratio of 50:1. Examples for fuel mixes:
– 1 US gals of gasoline: 2.6 oz. of 2-cycle engine oil
– 2.5 US gals of gasoline: 6.4 oz. of 2-cycle engine oil
– 5 US gals of gasoline: 12.8 oz. of 2-cycle engine oil
► When mixing, pour oil into the container first, and then add
gasoline. Close the container and shake it by hand to
ensure proper mix of oil and gasoline.
► Dispose of empty mixing-oil containers only at authorized
disposal locations.

13.2 Refueling the Chain Saw

0458-790-8221-A