Echo X750010904 User Manual

8

CS-450

 1.    Instruction 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.   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.

 4.   Cleaner cover knob - Device for installing the air 

cleaner cover.

 5.    Air cleaner cover - Covers air filter. 
 6.    Purge pump - When starting engine, push purge 

pump 3 or 4 times.

 7.   Choke control knob - Device for enriching the 

fuel/air mixture in the carburetor to aid cold start-

ing.

 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.    Spiked  bumper - Device, fitted in front of the 

guide bar mounting point, acting as a pivot when 
in contact with a tree or log.

 13.   Guide bar - The part that supports and guides 

the saw chain.

 

14.   Saw chain - Chain, serving as a cutting tool. 
 15.   Bar tip guard - Anti-kickback device attached 

on the bar nose.

 16.    Cylinder  cover - The cooling airflow grill. It cov-

ers the cylinder, spark plug and silencer.

 17.   Front handle (for the left hand) - Support han-

dle located at the front of the engine housing.

 18.   Oil tank cap - For sealing the oil tank.
 19.    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.

 20.   Fuel tank cap - For sealing the fuel tank.
 21.    Throttle  trigger - Device activated by the op-

erator’s finger, for controlling the engine speed.

 22.   Rear handle (for the right hand) - Support 

handle located towards the rear of the engine 

housing.

 23.    Throttle trigger lockout - A safety lever which 

must be depressed before the throttle trigger 

can be activated in order to prevent the acciden-

tal operation of the throttle trigger.

 24.    Ignition  switch - Device for connecting and dis-

connecting the ignition system and thus allowing 

the engine to be started or stopped.

muffler with catalyst -The muffler or catalytic 

muffler controls exhaust noise and emission. 

The spark arrestor screen prevents hot, glow-

ing particles of carbon from leaving the muffler. 

Keep exhaust area clear of flammable debris

. 

 

Moving parts can amputate fingers or cause severe injuries.  Keep hands, clothing and loose objects away from 

all openings.     

• 

aLwaYS stop engine, disconnect spark plug, and make sure all moving parts have come to a complete stop  

before removing obstructions, clearing debris, or servicing unit.

• 

DO nOT start or operate unit unless all guards and protective covers are properly assembled to unit.

• 

nEVEr reach into any opening while the engine is running.  Moving parts may not be visible through openings.