Echo CS-490 Operator's Manual - Nomenclature of Parts
7
CS-490
NOMENCLATURE OF PARTS
1. Operator's manual - Included with unit.
Read before operation and keep for future
reference to learn proper, safe operating
techniques.
2. Safety manual - Describe operating and safety
instructions for this chain saw.
3. Spiked bumper - Device, fitted in front of the
guide bar mounting point, acting as a pivot
when in contact with a tree or log.
4. Spark arrestor muffler - The spark arrestor
muffler controls the exhaust noise and
prevents hot, glowing particles of carbon
from leaving the muffler.
5. Front hand guard - Guard between the front
handle and the saw chain for protecting the
hand from injuries and aiding in control of the
chain saw if the hand slips off the handle.
This guard is used to lock the chain brake
which is to stop the saw chain rotation.
6. Choke control knob - Device for enriching the
fuel/air mixture in the carburetor to aid cold
starting.
Also activates fast idle throttle latch.
7. Rear handle (for the right hand) - Support
handle located towards the rear of the
engine housing.
8. Rear hand guard - Extension on the lower part
of the rear handle for protecting the hand
from the chain if it breaks or degrooves.
9. Clutch cover - Protective cover to the guide
bar, saw chain, clutch and sprocket when
the chain saw is in use.
10. Chain tension adjuster - Device to adjust
chain tension.
11. Chain catcher - A projection designed to
reduce the risk of the operator’s right hand
from being hit by a chain which has broken
or derailed from the guide bar during cutting.
12. Guide bar - The part that supports and guides
the saw chain.
13. Saw chain - Chain, serving as a cutting tool.
14. Bar tip guard - Anti-kickback device attached
on the bar nose.
15. Oil tank cap - For closing the oil tank.
16. Starter handle - Pull handle slowly until starter
engages then quickly and firmly.
When engine starts, return handle slowly.
Do not let handle snap back or damage to
unit will occur.
17. Fuel tank cap - For closing the fuel tank.
18. Throttle trigger - Device activated by the
operator’s finger, for controlling the engine
speed.
19. Throttle trigger lockout - A safety lever which
must be depressed before the throttle trigger
can be activated in order to prevent the
accidental operation of the throttle trigger.
20. Ignition switch - Device for connecting and
disconnecting the ignition system and thus
allowing the engine to be started or stopped.
21. Air cleaner cover - Covers air cleaner.
22. Cleaner cover knob - Device for installing the
air cleaner cover.
23. Front handle (for the left hand) - Support
handle located at the front of the engine
housing.
24. Cylinder cover - The cooling airflow grill.
It covers the cylinder, spark plug and
silencer.