stihl 034 av manual free

The STIHL 034 AV is a professional-grade gasoline-powered chainsaw featuring anti-vibration (AV) technology, a robust engine, and a range of safety and performance features. This manual provides essential information for safe operation, maintenance, troubleshooting, and specifications. Below are key sections covering safety, features, operation, maintenance, and technical data.

Features at a Glance

Key components: Engine with anti-vibration system, Chain brake, Throttle trigger lockout, Decompression valve, Chain oiler, and Quick-stop inertia brake.

Feature	Description
Anti-Vibration System (AV)	Reduces operator fatigue by dampening engine vibrations
Chain Brake	Stops chain rotation in kickback situations for operator safety
Decompression Valve	Easier starting by reducing cylinder compression
Automatic Chain Oiler	Lubricates chain and bar during operation
Quick-stop Inertia Brake	Activates chain brake automatically upon kickback detection
Throttle Trigger Lockout	Prevents accidental throttle engagement
STIHL Elastostart	Reduces starting resistance for easier pull-starts
Side-access Chain Tensioner	Allows easy chain adjustment without tools
Spark Arrestor Muffler	Reduces exhaust sparks and noise
Winter/Summer Shutter	Adjusts air intake for optimal performance in varying temperatures

Safety Information

Read all instructions before operation. Wear proper PPE: helmet, eye protection, hearing protection, gloves, chainsaw chaps, and steel-toed boots.

1. Clear work area of obstacles and bystanders.
2. Inspect chainsaw before each use: chain sharpness, tension, and lubrication.
3. Ensure chain brake is functional by performing a test activation.
4. Always hold saw with both hands: left on front handle, right on rear handle.
5. Never operate above shoulder height or on unstable surfaces.

WARNING! Risk of serious injury or death from kickback, cutting, or falling objects. Never operate a chainsaw without proper training and safety equipment.

Assembly & First-Time Setup

Unpack and inspect all components. Assemble guide bar and chain.

1. Attach guide bar: Loosen nuts, position bar on studs, align chain drive links with sprocket.
2. Install chain: Place chain over bar with cutters facing forward on top. Ensure proper direction.
3. Tension chain: Adjust side-access tensioner until chain snaps back when pulled from bar.
4. Fill fuel tank: Use fresh gasoline (min. 89 octane) mixed with STIHL 2-cycle oil at 50:1 ratio.
5. Fill oil tank: Use STIHL chainsaw bar and chain oil or equivalent.
6. Start engine: Engage chain brake, set master control lever to cold start position, pull starter cord.

CAUTION! Ensure chain is properly tensioned—too loose may derail; too tight may damage bar or engine.

Specifications

• Engine Displacement: 56.5 cc (3.45 cu. in.)
• Power Output: 3.4 kW (4.6 hp)
• Fuel Capacity: 0.75 L (25.4 fl. oz.)
• Oil Capacity: 0.32 L (10.8 fl. oz.)
• Guide Bar Lengths: 16" to 24" (40 cm to 60 cm)
• Chain Pitch: 3/8" or .325"
• Weight (without bar/chain): 6.2 kg (13.7 lbs)
• Ignition System: Electronic, breakerless
• Idle Speed: 2,800 rpm
• Maximum Power Speed: 9,500 rpm
• Sound Pressure Level: 106 dB(A)
• Vibration Level (front/rear): 4.5/2.5 m/s²

Controls and Components

Master Control Lever: Combines stop switch, choke, and throttle settings. Front Handle: Includes hand guard and chain brake trigger. Rear Handle: Contains throttle trigger with lockout.

Key Controls: Master Control (Stop/Choke/Run), Throttle Trigger, Throttle Trigger Lockout, Chain Brake Lever, Decompression Valve Button, Chain Tensioner, Winter/Summer Shutter.

Operation: Set master control to start position, engage decompression valve, pull starter cord. Adjust idle speed via carburetor screw if necessary. Use chain brake by pushing hand guard forward.

Operation Instructions

Starting, cutting techniques, and shutdown procedures.

1. Cold Start: Engage chain brake, set master control to choke, press decompression valve, pull starter cord 2-3 times until engine fires. Move lever to half-throttle, pull until starts. Disengage choke.
2. Warm Start: Set master control to run position, pull starter cord.
3. Cutting: Use full throttle during cuts. Let chain do the work—do not force. Beware of pinch points and kickback zones.
4. Shutdown: Release throttle, allow engine to idle, set master control to stop position.

Tip: Maintain a firm grip and stable stance. Plan escape path from falling tree or limb.

Maintenance Schedule

Regular maintenance ensures longevity and safe operation.

Interval	Task
Before each use	Check chain tension, sharpness, lubrication; inspect for loose parts
Every 10 hours	Clean air filter, check spark plug, inspect fuel filter
Every 20 hours	Clean cooling fins, check clutch and sprocket
Every 50 hours	Replace spark plug, clean exhaust screen, inspect anti-vibration elements
Annually	Professional servicing: carburetor adjustment, piston inspection

WARNING! Always disconnect spark plug wire before performing maintenance to prevent accidental starting.

Chain & Bar Care

Proper chain and bar maintenance ensures efficient cutting and reduces wear.

1. Sharpening: Use round file matching chain pitch (typically 5.5 mm). Maintain correct filing angle (usually 30°). File all cutters evenly.
2. Tensioning: Chain should be snug against bar but pull freely. Adjust when chain sags from bar groove.
3. Bar Maintenance: Clean bar groove regularly. Flip bar periodically to ensure even wear. Dress bar rails if burred.
4. Lubrication: Ensure oiler is working—check oil output at bar tip during operation.

CAUTION! A dull chain increases kickback risk and operator fatigue. Always stop engine before adjusting chain tension.

Fuel & Lubrication

Use only high-quality, fresh fuel and recommended lubricants.

• Fuel Mix: 50:1 ratio (2% oil). Use 89+ octane gasoline and STIHL 2-cycle engine oil.
• Bar & Chain Oil: Use STIHL chainsaw oil or equivalent ISO viscosity grade suitable for temperature.
• Storage: Do not store fuel mix longer than 30 days. Use fuel stabilizer if storing longer.
• Carburetor Adjustment: Only adjust if necessary. Factory settings are optimal for most conditions.

WARNING! Never use automotive oil or straight gasoline. Improper fuel mix will cause engine damage.

Storage Guidelines

Proper storage prevents fuel system issues and corrosion.

1. Empty fuel tank and run engine until it stops to clear carburetor.
2. Remove chain, clean, and soak in oil. Clean bar and coat with oil.
3. Clean entire saw, especially cooling fins and air filter.
4. Store in dry, cool place away from ignition sources.
5. Cover to prevent dust accumulation.

CAUTION! Never store with fuel in tank for extended periods—fuel degrades and damages components.

Troubleshooting

Symptom	Possible Cause	Corrective Action
Engine won't start	No spark, flooded, stale fuel	Check spark plug; use fresh fuel mix; follow cold start procedure.
Engine runs poorly	Dirty air filter, clogged fuel filter	Clean/replace air filter; replace fuel filter.
Chain doesn't turn	Clutch worn, chain brake engaged	Disengage chain brake; inspect clutch and sprocket.
Excessive vibration	Loose components, worn AV mounts	Tighten all fasteners; inspect anti-vibration elements.
Chain not oiling	Empty oil tank, clogged oiler	Fill oil tank; clean oil passages and filter screen.
Overheating	Dirty cooling fins, lean fuel mix	Clean cooling fins; check carburetor adjustment.

Reset: For electronic ignition issues, disconnect spark plug wire for 30 seconds to reset module.

Service: For technical support or parts, contact STIHL authorized dealer or visit www.stihlusa.com.