Craftsman 316.350850 Chainsaw User Manual

Operate this unit only
in a well-ventilated
outdoor area. Carbon
monoxide exhaust fumes can be lethal in a
confined area.
Never operate the saw
without the bar and
chain properly
WARNING: Be sure to read the Oil and Fuel Information
of this manual before you begin. If you do not
understand the oil and fuel information, do not attempt
to fuel your unit. For more information contact your
local Sears service center at 1-800-4-MY-HOME®.
The bar and chain require lubrication. The chain oiler
provides continuous lubrication to the chain and guide
bar. Be sure to fill the bar oil tank when you fill the fuel
tank. (Capacity = 6.8 fl. oz.). Lack of oil will quickly
ruin the bar and chain. Too little oil will cause over-
heating with smoke coming from the chain and discol-
oration of the bar. For maximum guide bar and chain
life, we recommend you use Craftsman chain saw bar
oil. If Craftsman bar oil is not available, you may use a
good grade SAE 30 oil until you are able to obtain the
Craftsman brand. The oil output is automatically
metered during operation. Your saw will use approxi-
mately one tank of bar oil for every tank of fuel mix.
Always fill the bar oil tank when you fill the fuel tank.
WARNING: Remove fuel cap slowly when refueling.
This engine is certified to operate on unleaded gaso-
line. Befor
e operation, gasoline must be mixed with a
good quality synthetic 2-cycle air-cooled engine oil.
We recommend Craftsman brand synthetic oil. Mix
gasoline and oil at a ratio of 40:1. 40:1 ratio is
obtained by mixing 3.2 ounces of oil with 1 gallon of
unleaded gasoline. Included with this saw is a 3.2
ounce container of oil. Pour the entire contents of this
container into one gallon of gasoline to achieve the
proper fuel mixture. DO NOT use automotive oil or
boat oil. These oils will cause engine damage. When
mixing fuel, follow the instructions printed on the oil
container. Once oil is added to the gasoline, shake
container momentarily to assure that the fuel is thor-
oughly mixed. Always read and follow the safety rules
relating to fuel before fueling your unit.
Experience indicates that alcohol blended with fuels
(called gasohol or using ethanol or methanol) can
attract moisture which leads to separation and forma-
tion of acids during storage. Acidic gas can damage
the fuel system of an engine when in storage. To avoid
engine problems, the fuel system should be emptied
before storage for 30 days or longer. Drain the gas
tank, start the engine and let it run until fuel lines and
carburetor are empty. Use fresh fuel next season.
Never use engine or carburetor cleaner products in the
fuel tank or permanent damage can occur. See STOR-
AGE instructions for additional information.
Be sure the chain brake is disengaged by pulling the
front hand guard back toward the front handle as far
as possible. The chain brake must be disengaged
before cutting with the saw.
WARNING: The chain brake must not move when the
engine runs at idle speed. If the chain brake moves at
idle speed, refer to CARBURETOR ADJUSTMENT in
this manual. Avoid contact with the muffler. A hot muf-
fler can cause serious burns.
When pulling the starter rope, do not use the full
extent of the rope as this can cause the rope to break.
Do not let starter rope snap back. Hold the handle and
let the rope rewind slowly. For cold weather starting,
start the unit at FULL CHOKE; allow the engine to
warm up before squeezing the throttle trigger.
DO NOT attempt to cut material with the choke/fast idle
lever in the FULL CHOKE position.
NOTE: Dispose of the old fuel/oil mix in accor
dance to
Federal, State and Local r
Old and/or improperly mixed fuel are the main reasons for
the unit not running properly. Be sure to use fresh (less
than 60 days old) clean unleaded fuel. Follow the instruc-
tions car
efully for the proper fuel/oil mixture.
Definition of Blended Fuels
Today's fuels are often a blend of gasoline and oxy-
genates such as ethanol, methanol, or MTBE (ether).
Alcohol-blended fuel absorbs water. As little as 1% water
in the fuel can make fuel and oil separate and lead to for-
mation of acids during storage. When using alcohol-
blended fuel, use fresh fuel.
Using Blended Fuels
If you choose to use a blended fuel, or its use is unavoid-
able, follow r
ecommended precautions:
Always use the fresh fuel mix explained in your opera-
tor's manual
Always shake the fuel mix before fueling the unit
Drain the tank and run the engine dry before storing the
Using Fuel Additives
The bottle of 2-cycle oil that came with your unit contains
a fuel additive which will help inhibit corrosion and mini-
mize the formation of gum deposits. It is recommended
that you use our 2-cycle oil with this unit.
If unavailable, use a good 2-cycle oil designed for
air-cooled engines along with a fuel additive, such as
Gas Stabilizer or an equivalent. Add 0.8 oz.
(23 ml.) of fuel additive per gallon of fuel according to the
instructions on the container. NEVER add fuel additives
directly to the unit's fuel tank.
To Obtain Correct Fuel Mix:
Thoroughly mix the proper ratio of 2-cycle engine oil with
unleaded gasoline in a separate fuel can. Use a 40:1
fuel/oil ratio. Do not mix them dir
ectly in the engine fuel
tank. See the table below for specific gas and oil mixing
NOTE: One gallon (3.8 liters) of unleaded gasoline mixed
with one 3.2 oz. (95 ml.) bottle of
2-cycle oil makes a 40:1 fuel/oil ratio.
(3.8 LITERS)
3.2 FL. OZ.
(95 ml)
1 LITER 25 ml
Add fuel in a clean,
well ventilated out
door area. Wipe up any spilled fuel immedi-
ately. Avoid creating a source of ignition for
spilled fuel. Do not start the engine until fuel
vapors dissipate.
Gasoline is extreme-
ly flammable. Ignited
Vapors may explode. Always stop the engine
and allow it to cool before filling the fuel
tank. Do not smoke while filling the tank.
Keep sparks and open flames at a distance
from the area.
Remove fuel cap
slowly to avoid injur
from fuel spray. Never operate the unit without
the fuel cap secur
ely in place
For proper engine
operation and maxi-
mum reliability, pay strict attention to the oil
and fuel mixing instructions on the 2-cycle
oil container. Using improperly mixed fuel
can severely damage the engine.