Installation Guide
Tools Needed:
- Chain tension adjustment tool
- Screwdrivers (flat and Phillips)
- Socket wrench set
- Bar and chain oil
- Fuel mixing container
- Safety gloves and goggles
Step-by-Step Assembly
- Unpack and Inspect: Remove all packaging materials and inspect chainsaw for any shipping damage.
- Handle Assembly: Attach the rear handle and front handle according to the provided instructions.
- Bar and Chain Installation: Install the guide bar and chain, ensuring proper alignment and tension.
- Chain Tension Adjustment: Adjust chain tension to manufacturer specifications (typically 1/4 inch play).
- Fuel and Oil Mixing: Mix gasoline and 2-cycle oil at the recommended ratio (usually 50:1).
- Lubrication System: Fill the bar and chain oil reservoir with recommended lubricant.
- Safety Check: Verify all safety features including chain brake, throttle lock, and safety switch.
- Initial Start-up: Follow starting procedure and test all functions in a safe area.
Specifications
| Model Series | CMCS620 / CMCS610 |
| Type | Gas-Powered Chainsaw |
| Engine Displacement | 62cc / 42cc |
| Bar Length | 20 inch / 18 inch |
| Power Output | 4.2 HP / 2.8 HP |
| Fuel Capacity | 14.9 fl oz / 12.7 fl oz |
| Oil Capacity | 8.5 fl oz / 7.4 fl oz |
| Weight (dry) | 13.2 lbs / 10.8 lbs |
| Chain Pitch | 3/8 inch |
| Chain Gauge | 0.050 inch |
| Sound Power Level | 112 dB(A) |
| Vibration Level | Front/Rear: 4.5/3.2 m/s² |
Warranty Information
- Full Warranty: 2 years limited warranty
- Engine Warranty: 5 years on professional models
- Additional Coverage: 90-day satisfaction guarantee
For warranty service, contact Craftsman Customer Service at 1-888-331-4569 or visit Craftsman.com
Key Features
Professional Grade Engine
Craftsman's professional-grade 2-cycle engine delivers maximum power with minimal vibration, featuring advanced air filtration and easy-start technology.
Automatic Oiling System
The automatic chain oiling system ensures consistent lubrication during operation, extending bar and chain life while reducing maintenance requirements.
Tool-Free Chain Tensioning
Quick-adjust side-mounted tensioner allows for fast chain adjustments without additional tools, maintaining optimal cutting performance.
Inertia-Activated Chain Brake
Advanced safety feature that automatically stops the chain in kickback situations, providing enhanced operator protection.
Anti-Vibration System
Multi-point anti-vibration system reduces operator fatigue during extended use while maintaining control and precision.
Clear Fuel Window
Integrated fuel level window allows for quick visual checks without removing the fuel cap, preventing unexpected run-outs.
Safety Features Explained
Chain Brake
Stops chain rotation within milliseconds during kickback events
Throttle Lockout
Prevents accidental throttle engagement during starting
Right Hand Guard
Protects operator's hand from chain contact
Spark Arrestor
Prevents emission of burning particles in dry conditions
Vibration Dampeners
Rubber isolators reduce vibration transfer to operator
Chain Catcher
Prevents broken chain from striking operator
Troubleshooting
| Problem | Possible Cause | Solution |
|---|---|---|
| Engine won't start | Old fuel, clogged filter, flooded engine | Use fresh fuel mix, clean air filter, clear flood condition |
| Engine starts then dies | Fuel line issues, carburetor problems | Check fuel lines, clean carburetor, adjust mixture |
| Poor cutting performance | Dull chain, improper tension, worn bar | Sharpen chain, adjust tension, inspect/replace bar |
| Chain won't oil | Empty oil tank, clogged oil ports | Fill oil reservoir, clean oil ports, check pump |
| Excessive vibration | Loose components, unbalanced chain | Tighten all fasteners, balance chain, check mounts |
| Chain throws off bar | Improper tension, worn sprocket, damaged bar | Adjust tension, replace sprocket, inspect bar groove |
Maintenance Codes
- Daily: Clean air filter, check chain tension, inspect bar
- Weekly: Sharpen chain, clean cooling fins, check fasteners
- Monthly: Clean spark arrestor, replace fuel filter, inspect spark plug
- Seasonal: Drain fuel system, clean carburetor, store properly
- Annual: Replace fuel lines, check compression, professional tune-up
Manual Downloads
Current Model Manuals
CMCS620
20" 62cc Professional Chainsaw
CMCS610
18" 42cc Homeowner Chainsaw
CMCS500
16" 40cc Electric Start Chainsaw
CMCS450
14" 38cc Compact Chainsaw
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