Mixing Fuel; Bar Oil - Shindaiwa 446s Owner's/Operator's Manual

Mixing Fuel

WARNING!
Minimize the risk of fire,
burns, and personal injury!
n STOP engine before refueling.
n ALWAYS allow the engine to cool
before refueling!
n ALWAYS open the fuel cap slow-
ly to allow any pressure build-up
in the tank to release fuel vapor
slowly.
n Avoid overfilling and wipe up all
spilled fuel. Move the engine at
least 10 feet (3 meters) from the
fueling point, storage area and
other readily flammable
materials before restarting!
n ALWAYS inspect the unit for fuel
leaks before each use. During
each refill, make sure there are
no fuel leaks around the fuel cap
and/or tank. If a fuel leak is evi-
dent, stop using the unit immedi-
ately. Fuel leaks must be repaired
before using the unit.
n NEVER smoke or light any fires
near the engine or fuel source!
n NEVER place any flammable
material near the engine muffler!
n NEVER operate the engine with-
out the muffler and spark arrester
in good working condition.
n ALWAYS have fire extinguishing-
tools available if you should need
them. Sparks can come from the
muffler, the bar and chain or other
sources. Help prevent forest fires.

Bar Oil

Oil Requirements
n When available, use Shindaiwa
Premium bar and chain oil.
n When Shindaiwa oil is not avail-
able, use a premium 30-weight oil
specifically blended for bar and
chain lubrication.
n For cold weather operation, bar
oil may be thinned by mixing with
clean kerosene at a ratio of 1:1.
Filling the Oil Reservoir
1. Place the saw on its side (clutch
cover down), and wipe any chips or
debris from around the oil cap.
2. Remove the oil cap at the front of
the saw.
3. Fill the oil reservoir with bar and
chain oil and replace the cap.
4. Wipe spilled oil from handles and
controls before starting the saw.
8
IMPORTANT!
Shindaiwa high-performance 2-cycle en-
gines are designed to operate on a 50:1
mixture of unleaded gasoline and 2-cycle
mixing oil. Using a fuel mixture less than
50:1 ratio (such as 80:1 or 100:1) can
cause catastrophic engine failure!
n Use only fresh, clean unleaded gaso-
line with a pump octane rating of 87
or higher.
n Mix fuel with a 2-cycle mixing oil
designed for use in high-performance
2-cycle air-cooled engines.
CAUTION!
n Some types of gasoline contain
alcohol. Never use any type of
gasoline containing more than
10% alcohol by volume! More
than 10% alcohol by volume may
affect the lubricating qualities of 2-
cycle mixing oils reducing engine
life and/or causing engine failure.
n Generic mixing oil and marine
engine oil may not be intended for
use in high-performance 2-cycle
engines and should never be used
in Shindaiwa engines. Mixing oils
not intended for use in high-perfor-
mance air-cooled 2-cycle engines
can cause excessive carbon
deposits, reduce engine life and/or
cause engine failure.
CAUTION!
Proper lubrication is critical to the
performance and service life of your
saw's oil pump, guide bar, and saw
chain! Always use a high quality
lubricating oil designed for saw
chain lubrication! Never use dirty or
reclaimed oil!
Oil Pump Adjustment
Guide bar and saw chain lubrication is
automatically provided by an adjust-
able-rate oil pump designed to operate
whenever the clutch drum rotates. A
temporary increase in oil flow rate is
often desirable when cutting hard-
woods or large-diameter softwoods,
and can be provided as follows:
1. Stop the engine and verify that the
engine stop switch is in the "OFF"
position.
Filling With Fuel
1. Place the saw on a hard surface with
the fuel cap up and wipe any chips or
debris from around the fuel cap.
2. Remove the fuel cap and fill the tank
with clean, fresh 2-cycle fuel mix.
Avoid overfilling and fuel spillage.
3. Wipe any spilled fuel and move the saw
at least 10 feet (3 meters) from the fuel-
ing point before starting the engine.
Example of 50:1 Mixing Quantities
GASOLINE 2-CYCLE MIXING OIL
U.S. Gallons U.S. Fluid Ounces
1 gal................................................2.6 oz
2.5 gal.............................................6.4 oz
5 gal..............................................12.8 oz
Liters
2.5 l.................................................50 ml
5 l..................................................100 ml
10 l.................................................200 ml
20 l................................................400 ml
2. Place the saw on its side, with the
clutch cover facing up.
Counter-Clockwise
to Increase Oil Flow
3. Use a screwdriver to turn the oil
flow rate adjustment screw.
n Clockwise to decrease lubrication.
n Counter-clockwise to increase
lubrication.
Milliliters