BBT Chainsaw Manual

The BBT Chainsaw is a professional-grade power tool designed for efficient cutting of wood and other materials. It features a high-performance engine, safety mechanisms including chain brake and throttle lock, automatic oiling system, ergonomic handles, and low-kickback chain. Below are key sections for safety, features, assembly, operation, maintenance, and troubleshooting.

Features at a Glance

Key components: High-torque gasoline engine, Guide Bar, Cutting Chain, Chain Brake, Throttle Trigger with Safety Lock, Front and Rear Handles, Chain Oiler, Air Filter, Spark Plug, and Fuel Tank.

Feature	Description
Engine Displacement	High-performance 2-stroke engine for powerful cutting
Guide Bar Length	Available in 14", 16", or 18" options
Chain Brake	Inertia-activated safety feature to stop chain rotation
Automatic Oiling	Lubricates chain and bar during operation
Anti-Vibration System	Reduces user fatigue during extended use
Safety Throttle Lock	Prevents accidental throttle engagement
Air Filter	Washable foam filter for engine protection
Fuel Mix Ratio	Requires gasoline and 2-stroke oil at 50:1 ratio
Spark Arrestor	Prevents emission of burning particles
Chain Tension Adjustment	Easy side-access for proper chain tensioning

Safety Information

Read all instructions before operation. Always wear proper safety gear.

1. Personal Protective Equipment: Wear safety glasses, hearing protection, gloves, steel-toed boots, and chainsaw chaps.
2. Work Area Safety: Clear area of obstacles and bystanders; ensure secure footing.
3. Kickback Awareness: Hold saw firmly with both hands; avoid contact with bar tip.
4. Fuel Safety: Refuel in well-ventilated area with engine off and cool.
5. Transport Safety: Engage chain brake and use scabbard when carrying.

WARNING! Chainsaws are dangerous tools. Failure to follow safety instructions can result in serious injury or death. Keep hands away from moving chain.

Assembly & Preparation

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

1. Attach Guide Bar and Chain: Place bar on mounting studs, loop chain around sprocket and bar groove, adjust tension.
2. Fill Fuel Tank: Mix unleaded gasoline with 2-stroke oil (50:1 ratio). Do not use automotive oil.
3. Fill Chain Oil Tank: Use recommended bar and chain oil.
4. Check Chain Tension: Chain should be snug against bar but pull freely by hand.
5. Test Safety Features: Verify chain brake and throttle lock function properly.

CAUTION! Ensure all fasteners are tightened securely before starting engine.

Specifications

• Engine Type: 2-stroke, air-cooled gasoline engine.
• Displacement: Varies by model (e.g., 45cc, 50cc).
• Power Output: High torque for demanding cutting tasks.
• Fuel Capacity: Approximately 0.5 liter (16.9 fl oz).
• Oil Capacity: Approximately 0.25 liter (8.5 fl oz).
• Weight: Varies by model (typically 4.5-5.5 kg / 10-12 lbs).
• Bar Length Options: 14", 16", 18".
• Chain Pitch/Gauge: 0.325" pitch, 0.050" gauge (check specific model).
• Sound Level: Approximately 105 dB(A) at operator's ear.
• Vibration Level: Reduced through anti-vibration system.

Controls and Components

Main Controls: Front Handle with Throttle Trigger, Rear Handle, Chain Brake Lever, Throttle Lockout, Choke Control, Stop Switch, and Decompression Valve (if equipped).

Component Locations: Fuel Cap, Oil Cap, Air Filter Cover, Spark Plug, Muffler, Chain Tensioner, and Bar Nut.

Operation: Pull choke for cold start, engage throttle lockout before pulling trigger, push chain brake forward to engage safety stop. Maintenance: Regular cleaning of air filter, checking spark plug, sharpening chain, and adjusting tension.

Operation Guide

Starting Procedure: Place on ground, engage chain brake, set choke, pull starter cord.

1. Cold Start: Set choke to full, pull starter 3-4 times until engine fires, move choke to half, pull until starts, then open choke.
2. Warm Start: Choke off, pull starter cord.
3. Cutting Technique: Stand with feet shoulder-width apart, grip handles firmly, let saw do the work without forcing.
4. Kickback Prevention: Maintain secure grip, be aware of bar tip contact, use reduced-kickback chain.
5. Shutting Down: Release throttle, engage chain brake, press stop switch.

Tip: Never operate chainsaw above shoulder height or with one hand.

Maintenance & Cleaning

Regular maintenance ensures optimal performance and safety.

1. Daily: Clean air filter, check chain tension and sharpness, inspect bar for wear.
2. Weekly: Clean cooling fins, check spark plug condition, clean fuel filter.
3. Monthly: Clean carburetor air intake, check all nuts and bolts for tightness.
4. Seasonal: Replace spark plug, clean exhaust port and spark arrestor.
5. Annual: Professional servicing recommended for carburetor adjustment and engine inspection.

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

Chain Sharpening & Replacement

Sharp chain improves cutting efficiency and safety.

1. Sharpening: Use round file matching chain pitch (typically 5/32" or 4.0mm). Maintain 30° filing angle.
2. Depth Gauge Setting: File depth gauges to 0.025" below cutter height using depth gauge tool.
3. Replacement: Replace chain when cutters are worn to 50% of original height or damaged.
4. Bar Maintenance: Rotate bar regularly to ensure even wear; file bar rails if grooved.
5. Sprocket Inspection: Replace drive sprocket if worn or damaged.

CAUTION! Wear heavy gloves when handling chain. Ensure proper chain direction during installation.

Storage Guidelines

Proper storage prevents fuel system issues and corrosion.

1. Short-term (under 30 days): Fill fuel tank to prevent condensation.
2. Long-term: Drain fuel completely or add fuel stabilizer. Run engine to distribute stabilized fuel through system.
3. Chain Care: Remove chain, clean in solvent, coat with oil, store separately.
4. General: Clean entire saw, store in dry place, cover to prevent dust accumulation.
5. Battery (if electric start): Remove and store battery in cool, dry place.

CAUTION! Store fuel in approved containers away from heat sources and living areas.

Warranty Information

BBT Chainsaws come with a limited warranty covering defects in materials and workmanship. Warranty period varies by model (typically 1-2 years for consumer use, 90 days for commercial use). Proof of purchase required. Warranty does not cover normal wear, misuse, improper maintenance, or unauthorized repairs. For warranty claims, contact authorized BBT service center or visit www.bbtchainsaws.com/support.

Troubleshooting

Symptom	Possible Cause	Corrective Action
Engine won't start	Fuel issues, spark plug, flooded engine	Check fuel mix, clean spark plug, wait if flooded, check choke setting.
Engine starts then dies	Clogged fuel filter, carburetor issues	Replace fuel filter, clean carburetor, check fuel lines.
Poor cutting performance	Dull chain, improper tension	Sharpen chain, adjust tension, check bar for wear.
Chain doesn't oil	Empty oil tank, clogged oil ports	Fill oil tank, clean oil ports, check oil pump function.
Excessive vibration	Loose components, unbalanced chain	Tighten all fasteners, balance chain, check anti-vibration mounts.
Chain keeps coming loose	Worn bar, improper tensioning	Inspect bar for wear, follow proper tensioning procedure.
Overheating	Clogged cooling fins, lean fuel mix	Clean cooling fins, adjust carburetor, use proper fuel mix.

Service: For technical support, contact 1-800-BBT-HELP or visit www.bbtchainsaws.com/support. Always use genuine BBT replacement parts.