Operator's Manual
Table Of Contents
- Operator’s Manual CS-3510 CHAIN SAW
- Table of Contents
 - Introduction
 - Servicing Information
 - Packing List
 - Safety
 - Emission Control
 - (Exhaust & Evaporative)
 - Description
 - Operation
 - Maintenance
 - Troubleshooting
 - Storage
 - Specifications
 - Notes
 - Product Registration
 
 
OPERATION CS-3510
28 X7503360201
© 8/20 ECHO Incorporated
◆ Use an approved fuel container. Mark fuel containers as 
containing 2-stroke mixture fuel.  
◆ DO NOT smoke near fuel.
◆ DO NOT allow flames or sparks near fuel.
◆ Fuel tanks/cans may be under pressure. Always loosen 
fuel caps slowly allowing pressure to equalize.
◆ NEVER refuel a unit when the engine is HOT or RUNNING!
◆ DO NOT fill fuel tanks indoors. ALWAYS fill fuel tanks 
outdoors over bare ground.
◆ DO NOT overfill fuel tank. Wipe up spills immediately.
◆ Securely tighten fuel tank cap and close fuel container 
after refueling.
◆ Inspect for fuel leakage. If fuel leakage is found, do not 
start or operate unit until leakage is repaired.
◆ Move at least 3 m (10 ft.) from refueling location before 
starting the engine.
Gasoline vapor is heavier than air, and can travel along the 
ground to nearby sources of ignition such as electrical motors, 
pilot lights, and hot or running engines. Vapors ignited by an 
ignition source can flash back to the fuel container, resulting in 
an explosion, fire, serious or fatal injuries, and extensive 
property damage.
Mixing Instructions
Stored fuel ages. Do not mix more fuel than you expect to use in 30 
days, 90 days when a fuel stabilizer is added.
1. Fill an approved fuel container 
with half of the required 
amount of gasoline.
2. Add the proper amount of 
2-stroke oil to gasoline.
3. Close container and shake to 
mix oil with gasoline.
4. Add remaining gasoline, close 
fuel container, and remix.
Fuel to Oil Mix – 50:1 Ratio
US Metric
Gas Oil Gas Oil
gal. fl.oz. L cc
12.65100
2 5.2 10 200
51325500










