Mixing Fuel; Bar Oil - Shindaiwa 490 Manual Del Operador

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 Pre-
mium bar and chain oil.
n When Shindaiwa oil is not available,
use a premium 30-weight oil spe-
cifically 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
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IMPORTANT!
Shindaiwa high-performance 2-cycle
engines 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.
Example of 50:1 Mixing Quantities
GASOLINE 2-CYCLE MIXING OIL
U.S. Gallons
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
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 hardwoods
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.
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-performance air-cooled
2-cycle engines can cause
excessive carbon deposits,
reduce engine life and/or cause
U.S. Fluid Ounces
engine failure.
Filling With Fuel
1. Place the saw on a hard surface with
Milliliters
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 fueling point before starting the
engine.
2. Place the saw on its side, with the
clutch cover facing up.
Counter-Clockwise to
Increase Oil Flow
3. Use a screwdriver to push down
and turn the oil flow rate adjustment
screw.
n Clockwise to decrease bar and chain
lubrication.
n Counter-clockwise to increase bar
and chain lubrication.