chainsaw 87g1 manual

The Chainsaw 87G1 is a professional-grade gasoline-powered chainsaw designed for heavy-duty cutting tasks. It features an 87cc engine, 20-inch guide bar, automatic oiling system, anti-vibration handles, chain brake, and quick-start technology. Below are key sections for safety, features, assembly, operation, maintenance, and troubleshooting.

Features at a Glance

Key components: 87cc 2-stroke engine, 20-inch guide bar, automatic chain oiler, anti-vibration system, chain brake, decompression valve, quick-start mechanism.

Feature	Description
Engine displacement	87cc 2-stroke gasoline engine
Guide bar length	20 inches (50cm)
Chain pitch	3/8 inch
Automatic oiler	Adjustable chain lubrication system
Anti-vibration	Reduced vibration handles for comfort
Chain brake	Inertia-activated safety brake
Decompression valve	Easier starting mechanism
Fuel capacity	700ml (23.7 fl oz)
Oil capacity	300ml (10.1 fl oz)
Weight (dry)	6.8 kg (15 lbs)

Assembly & Setup

Unpack and inspect all components. Assembly requires basic tools.

1. Attach guide bar: Loosen bar nuts, position bar on studs, align chain sprocket.
2. Install chain: Place chain on bar with cutting teeth facing forward, adjust tension.
3. Fill fluids: Add 2-stroke oil mixture (50:1) to fuel tank, fill bar oil reservoir.
4. Check controls: Verify throttle trigger, chain brake, and safety switches function properly.

WARNING! Always wear protective gear during assembly. Ensure chain is properly tensioned before use.

Safety Instructions

Power on chainsaw; follow safety protocols.

1. Personal protective equipment: Always wear safety glasses, hearing protection, gloves, chainsaw chaps, and steel-toe boots.
2. Pre-operation check: Verify chain tension, fluid levels, and all safety devices.
3. Clear work area: Remove debris, ensure stable footing, identify escape paths.
4. Proper grip: Hold with both hands, right hand on rear handle, left on front.

CAUTION! Never operate with one hand. Keep bystanders at least 15 feet away.

Specifications

• Engine Type: 2-stroke, air-cooled, single cylinder.
• Power Output: 5.2 kW (7.0 HP) at 9000 RPM.
• Fuel Mix: 50:1 (unleaded gasoline to 2-stroke oil).
• Ignition System: Electronic CDI.
• Chain Speed: 25 m/s at max RPM.
• Sound Level: 105 dB(A) at operator's ear.
• Vibration Level: Front handle: 4.2 m/s², Rear handle: 5.1 m/s².
• Warranty: 2 years commercial use, 5 years private use.

Controls and Functions

Main controls: Front handle with chain brake, rear handle with throttle trigger, master control lever, decompression valve.

Master Control Lever: Three positions - Stop (0), Run (I), Start (Choke symbol).

Chain brake: Manual activation via front hand guard; inertia-activated during kickback. Throttle lockout: Must be depressed before throttle can be engaged. Decompression valve: Reduces cylinder pressure for easier starting. Chain tensioner: Adjustable via side knob.

Starting Procedure

Cold start and warm start procedures differ.

1. Place on level ground: Ensure chain is clear of obstructions.
2. Set master control: Move to START (choke) position for cold engine.
3. Prime fuel: Press primer bulb 5-6 times until fuel is visible.
4. Pull starter: Hold front handle with left hand, place right foot in rear handle, pull starter cord briskly.
5. Switch to run: After engine fires, move master control to RUN position.

Tip: For warm starts, use RUN position without choke.

Cutting Techniques

Supports felling, limbing, bucking, and pruning.

1. Felling: Plan escape path, make notch cut, then back cut leaving hinge wood.
2. Limbing: Stand on opposite side of log, cut from top down, watch for spring poles.
3. Bucking: Support log properly, cut from top, avoid pinching chain.
4. Pruning: Use bottom of bar for control, cut in stages for heavy branches.
5. Kickback prevention: Maintain firm grip, avoid bar nose contact, use reduced kickback chain.
6. Bar tip safety: Never cut with upper quadrant of bar tip.

WARNING! Always cut at waist level or below. Never cut above shoulder height.

Maintenance Schedule

Daily: Check chain tension, sharpness, fluid levels. Clean air filter, check for loose parts.

Weekly: Clean cooling fins, inspect spark plug, check bar for wear, clean fuel filter.

Monthly: Replace air filter, inspect anti-vibration elements, check clutch drum.

Annually: Replace fuel lines, inspect carburetor, check all safety devices.

Chain Sharpening

Use round file (5.5mm) and filing guide. Maintain 30° cutting angle, 10° top plate angle.

Procedure: Secure bar, file from inside out, equal strokes per tooth, check depth gauges.

CAUTION! Always wear gloves when handling chain. File in one direction only.

Storage Guidelines

Long-term storage requires proper preparation.

1. Drain fuel: Run engine until carburetor is empty, or add fuel stabilizer.
2. Clean thoroughly: Remove sawdust, resin, and debris from all surfaces.
3. Remove chain: Clean and oil chain, store separately.
4. Protect cylinder: Add few drops of oil through spark plug hole, pull starter slowly.
5. Store properly: Keep in dry place, cover with breathable material.

Troubleshooting

Symptom	Possible Cause	Corrective Action
Engine won't start	Fuel issues, spark plug, flooded	Check fuel mix, clean spark plug, wait if flooded, check decompression valve.
Engine runs poorly	Air filter, carburetor, fuel filter	Clean/replace air filter, adjust carburetor, replace fuel filter.
Chain won't turn	Brake engaged, clutch, sprocket	Disengage chain brake, check clutch springs, inspect drive sprocket.
Excessive vibration	Loose parts, unbalanced chain	Tighten all fasteners, balance chain, check anti-vibration mounts.
Chain throws oil	Oiler adjustment, oil type	Adjust oiler flow rate, use proper bar and chain oil.

Service: Authorized service centers only. Contact 1-800-555-CHAINSAW or visit www.chainsaw87g1.com