Chainsaw User Manual
5
CS-450
TO AVOID KICKBACK
1. Hold the chain saw rmly with both 
hands.
2. Don’t let the nose of the guide bar 
contact any obstruction.
3. Tip contact may suddenly move the 
guide bar upward and backward, 
which may cause serious injury.
Part Number 890191-30131
Carburetor adjustment 
- Idle speed
Carburetor adjustment 
- High speed mixture
Carefully read the Instruction 
manual
Wear eyes, ears and head 
protection
Carburetor adjustment 
- Low speed mixture
Oil and gasoline mixture
Symbol form/shape Symbol description/application Symbol form/shape Symbol description/application
Chain oiler adjustment
Chain oil pump
Chain oil ll
DECALS
Locate these safety decals on your unit. The 
complete unit illustration found in the “NOMEN-
CLATURE OF PARTS” section will help you locate 
them. Make sure the decals are legible and that 
you understand and follow the instructions on 
them. If a decal cannot be read, a new one can be 
ordered from your ECHO dealer. 
Emergency stop
Choke control “Cold Start” 
position (choke closed)
STOP
SYMBOL FORM
Part Number X503-008770
WARNING!! Read and follow all 
safety precaution in the instruction 
manual. Failure to follow 
instructions could result in serious 
personal injury.
CS-450
Part Number X524-003720
Chain brake operation










