stihl 028 chainsaw manual

The STIHL 028 chainsaw is a professional-grade gasoline-powered chainsaw designed for demanding cutting tasks. It features a powerful engine, anti-vibration system, automatic oiler, chain brake, and a range of safety features. Below are key sections for safety, features, assembly, operation, maintenance, and troubleshooting.

1. Features at a Glance 2. Assembly & Preparation 3. First-Time Operation 4. Specifications 5. Controls and Functions 6. Chain & Bar Maintenance 7. Fuel & Lubrication 8. Safety Features 10. Care & Storage 11. Regulatory Information 12. Troubleshooting

Features at a Glance

Key components: Engine, guide bar, saw chain, anti-vibration handles, chain brake, automatic chain oiler, and safety throttle lock.

Feature	Description
Engine Type	2-stroke, single cylinder, air-cooled gasoline engine
Displacement	Approximately 51.5 cc (3.14 cu. in.)
Power Output	High torque for demanding cutting applications
Guide Bar Length	Typically 16" to 20" (varies by model)
Chain Brake	Inertia-activated for kickback protection
Anti-Vibration System	Reduces operator fatigue
Automatic Oiler	Lubricates chain and bar during operation
Fuel Tank Capacity	Approximately 0.55 US qt (0.52 l)
Oil Tank Capacity	Approximately 0.26 US qt (0.25 l)
Ignition System	Electronic, capacitor discharge ignition (CDI)

Assembly & Preparation

Unpack and inspect all parts. Assemble on a clean, stable surface.

Attach guide bar and chain: Place bar on studs, tension chain correctly, tighten nuts.
Fill fuel tank: Use proper gasoline/oil mixture (50:1 with STIHL HP Ultra oil).
Fill chain oil tank: Use STIHL chain oil or equivalent.
Check chain tension: Chain should snap back when pulled from bar.

WARNING! Always wear protective gear: gloves, eye protection, hearing protection, chainsaw chaps, and sturdy boots.

First-Time Operation

Perform pre-start checks before each use.

Check chain brake: Ensure it functions properly by engaging manually.
Set master control lever: Move to cold start position (choke on).
Prime fuel system: Press fuel pump bulb several times.
Start saw: Place on ground, hold front handle, pull starter rope firmly.
Warm up: Allow engine to run at idle for 30 seconds before cutting.

CAUTION! Never start the saw unless the chain brake is disengaged and you are in a clear, stable position.

Specifications

Engine Displacement: 51.5 cc (3.14 cu. in.)
Powerhead Weight: Approximately 12.1 lbs (5.5 kg) without bar and chain
Fuel/Oil Ratio: 50:1 (Gasoline to STIHL HP Ultra 2-cycle oil)
Ignition: Electronic CDI
Chain Pitch: 3/8" or .325" (depending on configuration)
Chain Gauge: .050" or .058"
Recommended Bar Length: 16", 18", 20"
Sound Pressure Level: Typically 106 dB(A) at operator's ear
Vibration Level: Front/Rear handle: approx. 4.5/2.5 m/s²

Controls and Functions

Master Control Lever: Combines choke, throttle lock, and stop functions. Throttle Trigger: Controls engine speed. Throttle Lockout: Must be pressed to engage throttle. Chain Brake Lever: Manual engagement; inertia-activated. Decompression Valve: Eases starting (if equipped).

Operation: Start with master control in cold start position. Once started, push to fast idle, then to run position. Use throttle trigger for cutting. Engage chain brake when not actively cutting.

Chain & Bar Maintenance

Regular maintenance ensures optimal performance and safety.

Check chain tension frequently: Adjust when chain sags from bar.
Sharpen chain: Use round file and guide; maintain correct filing angle (typically 30°).
Clean bar groove: Remove debris from oil holes and groove.
Flip bar regularly: Ensures even wear.
Check sprocket: Replace if worn.

Tip: A sharp chain cuts faster, reduces operator effort, and is safer than a dull chain.

Fuel & Lubrication

Use fresh, high-quality unleaded gasoline (min. 89 octane) mixed with STIHL HP Ultra oil at 50:1 ratio.

Mix fuel in approved container: Never mix directly in saw tank.
Fill chain oil tank: Use proper bar and chain oil, especially in cold weather.
Check oiler output: Run saw at full throttle against a light-colored surface; oil line should appear.
Storage: For long-term storage, run carburetor dry or use fuel stabilizer.

WARNING! Gasoline is highly flammable. Mix and refuel outdoors, away from sparks or flames. Allow engine to cool before refueling.

Safety Features

Chain Brake: Stops chain within milliseconds if activated by inertia (kickback) or manually. Throttle Lockout: Prevents accidental throttle engagement. Right-Hand Guard: Protects hand from broken chain. Anti-Vibration System: Reduces fatigue. Muffler: Directs exhaust and reduces noise.

Care & Storage

Clean saw after each use. Remove debris from air intake, cooling fins, and guide bar. Check all fasteners for tightness.

Storage: Empty fuel tank or add stabilizer. Run carburetor dry. Remove chain and bar, clean, and coat with oil. Store in a dry, secure place.

CAUTION! Never use pressure washers or solvents to clean the saw. Keep handles clean and dry.

Regulatory Information

This chainsaw meets applicable ANSI/OPEI standards. It is equipped with a spark-arresting muffler certified to USDA Forest Service standards. STIHL is a registered trademark of Andreas Stihl AG & Co. KG. For genuine parts, accessories, and service, contact an authorized STIHL servicing dealer.

Troubleshooting

Symptom	Possible Cause	Corrective Action
Engine will not start	No fuel, flooded, spark plug	Check fuel, set master control to start, check/chang spark plug.
Engine starts then dies	Fuel filter, carburetor, air filter	Check fuel line/filter, clean air filter, adjust carburetor (by dealer).
Chain does not turn	Chain brake engaged, clutch, sprocket	Disengage chain brake, check clutch drum/sprocket for wear.
Chain throws oil excessively	Oiler setting	Adjust oiler output screw (if equipped).
Excessive vibration	Chain unbalanced, loose parts	Sharpen chain evenly, check/tighten all fasteners, mounts.
Poor cutting performance	Dull chain, incorrect filing	Sharpen chain correctly, check depth gauges.

Service: For repairs beyond basic maintenance, contact an authorized STIHL dealer. Use only STIHL original parts.