chainsaw manual cs-440

The CS-440 chainsaw is a professional-grade gas-powered chainsaw designed for heavy-duty cutting tasks. Featuring a 44cc 2-stroke engine, 18-inch guide bar, automatic oiling system, anti-vibration handles, chain brake safety feature, and easy-start technology. Below are key sections for safety, features, assembly, operation, maintenance, and troubleshooting.

Safety Instructions

Always wear protective equipment: safety glasses, hearing protection, gloves, chainsaw chaps, and steel-toe boots. Keep bystanders at least 15 feet away. Never operate above shoulder height or on unstable surfaces.

Safety Feature	Description
Chain Brake	Stops chain immediately upon kickback detection
Throttle Lockout	Prevents accidental throttle engagement
Right-Hand Guard	Protects hand from debris
Anti-Vibration System	Reduces operator fatigue
Spark Arrestor	Prevents ignition of flammable materials

Features at a Glance

Key components: 44cc 2-stroke engine, 18-inch guide bar, automatic chain oiler, decompression valve, air filtration system, side-access chain tensioner.

Feature	Description
Engine Displacement	44cc 2-stroke gasoline engine
Guide Bar Length	18 inches (45 cm)
Chain Pitch	3/8 inch
Fuel Capacity	14.9 oz (440 ml)
Oil Capacity	8.5 oz (250 ml)
Weight (without bar/chain)	10.8 lbs (4.9 kg)
Ignition System	Electronic ignition with easy-start
Vibration Damping	Multi-point anti-vibration system
Air Filter	Two-stage filtration system
Chain Brake	Inertia-activated safety feature

Assembly & Setup

Unpack and inspect all components. Assemble on clean, flat surface.

1. Attach guide bar: Remove bar cover nuts, position bar on studs, align chain with sprocket.
2. Install chain: Place chain over bar with cutting teeth facing forward, adjust tension.
3. Fill fluids: Mix fuel (50:1 gas/oil ratio), fill fuel tank, fill chain oil reservoir.
4. Check controls: Verify throttle, choke, and chain brake operation.

WARNING! Always wear gloves when handling chain. Ensure all fasteners are properly tightened.

Specifications

• Engine: 44cc 2-stroke, air-cooled.
• Power Output: 2.5 kW (3.4 hp) at 9,000 RPM.
• Maximum Chain Speed: 65 ft/s (20 m/s).
• Fuel Mix: 50:1 (unleaded gasoline to 2-stroke oil).
• Bar Length Options: 16", 18", 20".
• Chain Type: 3/8" pitch, .050" gauge, 72 drive links.
• Sound Level: 105 dB(A) at operator's ear.
• Warranty: 2 years commercial, 5 years residential.

Controls and Components

Main controls: Front Handle with throttle trigger, Rear Handle with throttle lockout, Choke lever, Decompression valve, Chain brake lever, Master control lever.

Components: Fuel tank cap, Oil tank cap, Air filter cover, Spark plug, Muffler, Chain tensioner, Chain catcher, Bar nuts.

Operation: Master control lever combines choke/stop functions. Chain brake engages automatically or manually. Decompression valve reduces starting effort by 40%.

Starting Procedure

Cold Start Procedure:

1. Place chainsaw on flat ground, clear of debris.
2. Engage chain brake by pushing forward.
3. Set master control lever to choke position.
4. Press decompression valve (if equipped).
5. Pull starter rope 3-5 times until engine fires.
6. Move lever to half-throttle position.
7. Pull starter rope until engine starts.
8. Blip throttle to disengage choke.

CAUTION! Never drop-start chainsaw. Always engage chain brake before starting.

Operation Guidelines

Proper cutting techniques for safety and efficiency.

1. Planning: Check area for obstacles, plan escape path.
2. Grip: Hold firmly with both hands, right hand on rear handle.
3. Position: Stand with feet shoulder-width, left foot slightly forward.
4. Cutting: Let chain do the work, avoid forcing saw.
5. Kickback Prevention: Keep nose of bar away from objects.
6. Refueling: Stop engine, allow to cool 5 minutes before refueling.

Tip: Maintain sharp chain for efficient cutting and reduced operator fatigue.

Maintenance Schedule

Daily maintenance ensures optimal performance and longevity.

Interval	Task
Before each use	Check chain tension, bar oil level, fuel level
Every 5 hours	Clean air filter, check spark plug
Every 20 hours	Clean spark arrestor, check bar wear
Every 50 hours	Replace fuel filter, clean carburetor
Every 100 hours	Replace spark plug, check compression

Chain Sharpening

Proper chain sharpening maintains cutting efficiency and safety.

1. Secure bar: Clamp bar in vise or use filing guide.
2. File angle: Maintain 30° cutting angle, 10° top plate angle.
3. File size: Use 5/32" (4.0 mm) round file for 3/8" chain.
4. File direction: Push file forward in smooth strokes.
5. Depth gauges: File to 0.025" (0.65 mm) below cutter.
6. Equal strokes: Apply same number of strokes to each cutter.

WARNING! Always wear cut-resistant gloves when handling chain. Ensure chain is properly tensioned before sharpening.

Storage Guidelines

Proper storage prevents fuel system issues and corrosion.

1. Drain fuel: Run engine until carburetor is empty.
2. Remove chain: Clean and oil chain, store separately.
3. Clean unit: Remove sawdust, dirt, and debris.
4. Lubricate: Apply oil to cylinder through spark plug hole.
5. Store: Place in dry, cool location, cover to prevent dust.

CAUTION! Never store with fuel in tank for more than 30 days. Use fuel stabilizer for longer storage.

Troubleshooting

Symptom	Possible Cause	Corrective Action
Engine won't start	Fuel issues, spark plug	Check fuel mix, clean spark plug, verify choke position.
Engine starts then dies	Air filter, carburetor	Clean air filter, adjust carburetor settings.
Chain won't turn	Brake engaged, clutch	Disengage chain brake, check clutch assembly.
Excessive vibration	Loose components	Tighten all fasteners, check anti-vibration mounts.
Chain throws oil	Over-oiling	Adjust oiler setting, check oil viscosity.
Poor cutting performance	Dull chain, bar wear	Sharpen chain, check bar for wear, replace if grooved.

Service: Authorized service centers only. Contact manufacturer for dealer locations.

Support: 1-800-CHAINSAW; www.cs-440support.com