chainsaw manual cs 370

The CS 370 is a professional-grade chainsaw featuring a 37cc 2-stroke engine, 16-inch guide bar, automatic chain oiling system, anti-vibration handles, chain brake safety feature, quick-stop inertia brake, easy-start system, and low-kickback chain. Below are key sections for safety, features, assembly, operation, maintenance, and troubleshooting.

Features at a Glance

Key components: 37cc 2-stroke engine, 16-inch guide bar, automatic oiler, chain brake, anti-vibration system, quick-stop inertia brake.

Feature	Description
Engine Type	37cc 2-stroke air-cooled gasoline engine
Guide Bar Length	16 inches (40cm)
Chain Pitch	3/8 inch
Chain Gauge	0.050 inch
Fuel Capacity	14.9 oz (440ml)
Oil Capacity	8.5 oz (250ml)
Weight	10.8 lbs (4.9kg) without bar and chain
Sound Power Level	112 dB(A)
Vibration Level	Front handle: 4.5 m/s², Rear handle: 5.5 m/s²
Safety Features	Chain brake, inertia brake, throttle lockout

Safety Instructions

Always wear proper safety equipment and follow safety guidelines.

1. Personal Protective Equipment: Wear safety glasses, hearing protection, gloves, chainsaw chaps, and steel-toed boots.
2. Pre-Operation Check: Inspect chainsaw for damage, ensure chain tension is correct, check fuel and oil levels.
3. Work Area Safety: Clear work area of obstacles, maintain secure footing, keep bystanders at safe distance.
4. Kickback Prevention: Hold saw firmly with both hands, avoid contact with bar tip, use reduced-kickback chain.

WARNING! Never operate chainsaw with one hand. Always engage chain brake when not cutting. Keep hands away from moving chain.

Assembly & Setup

Assemble chainsaw following these steps.

1. Attach guide bar and chain: Place bar on mounting studs, install chain with cutting teeth facing forward.
2. Adjust chain tension: Loosen bar nuts, adjust tensioning screw until chain snaps back when pulled from bar.
3. Fuel mixture: Use 50:1 gasoline to 2-stroke oil ratio (89 octane minimum).
4. Chain oil: Fill with bar and chain oil (not motor oil).

CAUTION! Ensure chain is properly installed with cutting direction correct. Over-tightening can damage bar and chain.

Specifications

• Engine Displacement: 37cc (2.26 cubic inches)
• Power Output: 2.0 HP
• Maximum Power Speed: 9,500 RPM
• Idle Speed: 2,800 RPM
• Fuel Consumption: 580 g/kWh
• Spark Plug: NGK BPMR7A (gap 0.020 inch/0.5mm)
• Carburetor: Walbro WT-215
• Air Filter: Dual-stage foam and mesh
• Warranty: 2 years commercial use, 5 years consumer use

Controls and Components

Main controls: Front handle with chain brake, rear handle with throttle trigger, throttle lockout, choke control, primer bulb.

Components: 1. Chain brake lever 2. Throttle trigger 3. Throttle lockout 4. Choke control 5. Primer bulb 6. Stop switch 7. Fuel cap 8. Oil cap 9. Chain tensioning screw 10. Bar nuts 11. Spark arrestor 12. Air filter cover

Operation: Pull choke for cold start, press primer bulb 5 times, set stop switch to run position, pull starter cord. For warm start: Choke off, primer not needed.

Operating Instructions

Starting, cutting techniques, and proper handling.

1. Starting Procedure: Engage chain brake, set choke, prime, pull starter cord until engine fires, disengage choke, restart.
2. Basic Cutting: Hold saw firmly, let chain reach full speed before contacting wood, avoid forcing saw.
3. Felling Trees: Plan escape path, make notch cut, then back cut leaving hinge wood.
4. Limbing: Cut from top of log, watch for springback on underside branches.
5. Bucking: Support log properly, cut from top down, avoid contact with ground.

Tip: Let saw do the work - don't push or force. Keep chain sharp for best performance.

Maintenance & Care

Regular maintenance ensures optimal performance and longevity.

1. Daily: Clean air filter, check chain tension, inspect bar for wear, clean cooling fins.
2. Weekly: Clean spark arrestor, check spark plug, inspect fuel filter.
3. Monthly: Clean carburetor, check all fasteners for tightness, inspect anti-vibration elements.
4. Seasonal: Replace fuel filter, inspect clutch and sprocket, check ignition system.

WARNING! Always disconnect spark plug wire before performing maintenance. Allow engine to cool completely.

Chain Sharpening

Sharp chain improves cutting efficiency and safety.

1. File Size: Use 5/32 inch (4.0mm) round file for sharpening cutters.
2. Filing Angle: Maintain 30° angle on top plate, 10° on side plate.
3. Depth Gauges: File depth gauges with flat file to maintain 0.025 inch (0.65mm) below cutters.
4. Filing Technique: File from inside to outside, maintain equal strokes on all cutters.

CAUTION! Wear gloves when handling chain. Ensure chain is properly secured during sharpening.

Storage Guidelines

Proper storage prevents fuel system issues and corrosion.

1. Short-term (under 30 days): Add fuel stabilizer to fuel tank, run engine for 5 minutes to circulate.
2. Long-term (over 30 days): Drain fuel tank and carburetor, run engine until it stops from fuel starvation.
3. Chain Storage: Remove chain, clean in solvent, coat with oil, store in sealed container.
4. General: Store in dry location, cover to prevent dust accumulation.

Important: Never store chainsaw with fuel in tank for extended periods without stabilizer.

Warranty Information

CS 370 comes with limited warranty: 2 years for commercial use, 5 years for consumer use. Warranty covers defects in materials and workmanship. Not covered: Normal wear, misuse, improper maintenance, unauthorized repairs. Keep purchase receipt for warranty claims. For service, contact authorized service centers only.

Troubleshooting

Symptom	Possible Cause	Corrective Action
Engine won't start	Fuel issues, spark plug, air filter	Check fuel mixture, clean/replace spark plug, clean air filter.
Engine starts then dies	Carburetor adjustment, fuel filter	Adjust carburetor screws, replace fuel filter.
Poor cutting performance	Dull chain, improper tension	Sharpen chain, adjust tension, check bar for wear.
Chain won't stop when brake engaged	Brake mechanism, clutch	Clean brake band, check clutch springs, replace if worn.
Excessive vibration	Loose components, worn AV mounts	Tighten all fasteners, replace anti-vibration mounts.
Chain throws oil excessively	Oiler adjustment, wrong oil viscosity	Adjust oiler screw, use proper bar and chain oil.

Service: For technical support: 1-800-555-CHAINSAW (2424) or visit www.chainsawcs370.com