680ES OPERATOR MANUAL
23
© 2015 ICS®, Blount International Inc. Specications are subject to
change without notice. REV071315 F/N 577451
Fueling
FUEL MIXING INSTRUCTIONS
Pressure can build up in the fuel tank and container and possibly cause sudden
release of fuel vapors when the tank is opened.
Open the fuel cap slowly and always provide adequate ventilation when
handling fuel.
It is important to accurately measure the amount of oil to be mixed with gasoline
to assure that the correct mixture is obtained. When mixing small amounts of fuel,
even small inaccuracies can drastically aect the ratio of the mixture.
Always mix gasoline and oil in a clean container approved for use with fuel. Keep
fuel container closed tightly to prevent moisture from getting into the fuel. Do not
mix more than one month’s supply of fuel. This helps prevent the separation of the
2-stroke oil from the gasoline (varnishing).
Before fueling, clean the area around fuel cap on the saw to prevent dirt from
contaminating the fuel. Contamination of the fuel tank can lead to saw malfunction.
Always begin mixing fuel by pouring half the amount of gasoline to be prepared into
the mixing container. Then add the correct amount of 2-stroke oil for 4% (25:1)
mixture and nish by adding gasoline to obtain the total quantity of mixed fuel.
Shake the fuel container to thoroughly mix the gasoline and oil before adding to the
saw. The table below shows the correct quantity of two-cycle oil to be used.
FUEL MIXTURE: 4% (25:1) mixture gasoline/oil.
GASOLINE OIL
US Gallon US Fl oz
1 5.2
2 1/2 12.8
5 25.6
GASOLINE OIL
Liters ml
1 40
5 200
10 400
20 800
NOTE: If the saw is not used for an extended period of time (3 months) the fuel tank
should be emptied and cleaned.
CAUTION
IMPORTANT
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