Use and Care Manual
4
CS-4510
 1. Do not operate a chain saw with one hand! 
Serious injury to the operator, helpers, 
bystanders, or any combination of these 
persons may result from one-handed operation.  
A chain saw is intended for two-handed use. 
 2. Do not operate a chain saw when you are 
fatigued. 
 3. Use safety footwear, snug-fitting clothing and 
protective gloves. 
Wear eye, hearing, and head protection 
devices.
 4. Use caution when handling fuel. 
Move the chain saw at least 3 m (10 feet) from 
the fueling point before starting the engine. 
 5. Do not allow other persons to be near the chain 
saw when starting or   cutting with the 
chain saw. 
Keep bystanders and animals out of the 
work area. 
 6. Do not start cutting until you have a clear work 
area, secure footing, and a planned retreat 
path from the falling tree. 
 7. Keep all parts of your body away from the saw 
chain when the engine is running. 
 8. Before you start the engine, make sure that the 
saw chain is not contacting anything. 
 9. Carry the chain saw with the engine stopped, 
the guide bar and saw chain to the rear, and 
the muffler away from your body. 
 10. Do not operate a chain saw that is damaged, 
improperly adjusted, or not completely and 
securely assembled. 
Be sure that the saw chain stops moving when 
the throttle control trigger is released. 
 11. Shut off the engine before setting the chain 
saw down. 
 12. Use extreme caution when cutting small size 
brush and saplings because slender material 
may catch the saw chain and be whipped 
toward you or pull you off balance. 
 13. When cutting a limb that is under tension, be 
alert for spring-back so that you will not be 
struck when the tension in the wood fibers is 
released. 
 14. Keep the handles dry, clean, and free of oil or 
fuel mixture. 
 15. Operate the chain saw only in well ventilated 
areas. 
 16. Do not operate a chain saw in a tree unless 
you have been specifically trained to do so. 
 17. All chain saw service, other than items 
listed in the Instruction manual maintenance 
instructions, should be performed by competent 
service personnel. 
(For example, if improper tools are used to 
remove the flywheel or if an improper tool is 
used to hold the flywheel in order to remove 
the clutch, structural damage to the flywheel 
could occur and could subsequently cause the 
flywheel to burst.) 
 18. When transporting your chain saw, use the 
appropriate guide bar scabbard. 
 19. Spark arrestor mufflers approved to SAE 
Standard J335 are standard on ECHO chain 
saws to reduce the possibility of forest fires. 
Do not operate the chain saw with a loose or 
defective muffler. 
Do not remove the spark arrestor screen. 
20. When using a chain saw a fire 
extinguisher should be available.
21. When felling, keep at least 2 tree lengths 
between yourself and your fellow 
workers.
22. Follow instructions in your operator’s manual 
for starting the chain saw.
23. Never adjust the guide bar or saw chain when 
the engine operating.
24. When boring with the chain saw, the initial cut 
should be introduced with the lower part of the 
nose (tip) until the hole is sufficiently large so 
as to introduce the entire nose (tip) of the guide 
bar. This technique should reduce the danger 
of kickback.
25. Allow your chain saw to cool before 
refueling, and do not smoke while 
refueling.
B. Other Safety Precautions










