STIHL 271 Manual

The STIHL 271 is a professional-grade chainsaw designed for demanding cutting tasks. It features a powerful engine, advanced safety systems, ergonomic design, and low-emission technology. Below are key sections for safety, features, assembly, operation, maintenance, and troubleshooting.

1. Features at a Glance 2. Assembly Instructions 3. First-Time Operation 4. Technical Specifications 5. Controls and Functions 6. Chain and Bar Maintenance 7. Fuel and Lubrication 8. Safety Features 9. Cleaning & Storage 10. Regulatory Information 11. Troubleshooting

Features at a Glance

Key components: Engine with STIHL anti-vibration system, QuickStop® chain brake, side-access chain tensioner, decompression valve, and ErgoStart™ system.

Feature	Description
Engine displacement	50.2 cc professional engine
Power output	3.0 bhp for high cutting performance
Fuel tank capacity	500 ml (16.9 fl. oz.)
Oil tank capacity	260 ml (8.8 fl. oz.)
Guide bar lengths	16" to 20" (40 cm to 50 cm)
Weight (powerhead)	5.7 kg (12.6 lbs)
Anti-vibration system	Reduces operator fatigue
QuickStop® chain brake	Stops chain in milliseconds if kickback occurs
Side-access chain tensioner	Easy chain adjustment without tools
Decompression valve	Reduces starting effort by 40%

Assembly Instructions

Unpack and inspect all components. Ensure all parts are present before assembly.

Attach guide bar and chain: Place bar on studs, loop chain over sprocket, align with bar groove.
Install bar nuts: Hand-tighten nuts, then use combination wrench to secure.
Adjust chain tension: Use side tensioner to achieve proper slack (chain should snap back when pulled).
Fill fuel and oil: Use STIHL MotoMix® or 50:1 fuel/oil mixture; fill chain oil reservoir.

WARNING! Always wear protective gloves when handling the chain. Ensure chain brake is engaged during assembly.

First-Time Operation

Perform pre-start checks before first use.

Check chain tension: Chain should move freely but not sag from bar.
Test chain brake: Pull hand guard forward to engage; it should snap into position.
Start engine: Set master control lever to cold start position, pull starter rope until engine fires.
Warm up: Allow engine to idle for 30 seconds before applying throttle.

CAUTION! Clear work area of obstacles. Maintain firm footing and secure grip at all times.

Technical Specifications

Engine Type: 2-stroke, single cylinder
Displacement: 50.2 cm³ (3.06 cu. in.)
Power Output: 2.2 kW (3.0 bhp) at 9,000 rpm
Fuel/Oil Ratio: 50:1 (STIHL HP Ultra oil recommended)
Idle Speed: 2,800 rpm
Maximum Powerhead Speed: 13,500 rpm
Sound Pressure Level: 104 dB(A)
Vibration Level (front/rear): 3.2/2.5 m/s²
Emissions Compliance: EPA Phase III, CARB Tier III

Controls and Functions

Master control lever: Combines stop switch, choke, and run positions. Throttle trigger: Variable speed control with interlock. Throttle trigger lockout: Prevents accidental throttle engagement. Chain brake hand guard: Engages QuickStop® system when pushed forward. Decompression valve: Reduces cylinder pressure for easier starting. Fuel primer bulb: Press 5-10 times for cold starts.

Starting Procedure: Engage chain brake, set master control to cold start, press decompression valve, pull starter rope until engine fires, then move control to run position.

Chain and Bar Maintenance

Regular maintenance ensures optimal performance and safety.

Chain sharpening: Use round file matching chain pitch (typically 3/8" or .325").
Bar maintenance: Clean bar groove weekly; flip bar monthly for even wear.
Sprocket inspection: Replace drive sprocket if teeth show significant wear.
Tension adjustment: Check tension every 15-20 minutes of operation.

Tip: Keep chain sharp - a dull chain increases kickback risk and reduces cutting efficiency.

Fuel and Lubrication

Use only high-quality, fresh fuel mixtures.

Fuel mixture: 50:1 ratio of unleaded gasoline (minimum 89 octane) to STIHL HP Ultra oil.
Chain oil: Use STIHL chain oil or equivalent for proper lubrication.
Storage: Empty fuel tank if storing more than 30 days; run engine dry.
Oil pump adjustment: Turn screw clockwise to increase oil flow for longer bars.

WARNING! Never use automotive oil or fuel older than 60 days. Store fuel in approved containers away from heat sources.

Safety Features

QuickStop® chain brake: Activates automatically or manually via hand guard. Throttle trigger lockout: Prevents accidental throttle engagement. Right-hand guard: Protects from chain contact. Chain catcher: Prevents broken chain from striking operator. Anti-vibration system: Reduces hand-arm vibration syndrome risk.

Cleaning & Storage

Clean after each use. Remove sawdust from air intake, cooling fins, and chain brake mechanism. Wipe exterior with damp cloth. Store in dry place with bar cover installed.

CAUTION! Never use high-pressure water or solvents. Allow engine to cool completely before cleaning.

Regulatory Information

EPA Certified: Meets Phase III emission standards. CARB Compliant: Tier III certified for California. ANSI B175.1: Compliant with safety standards. EU Noise Directive: 2000/14/EC compliant. For genuine STIHL parts and service, visit www.stihlusa.com or contact 1-800-467-8445.

Troubleshooting

Symptom	Possible Cause	Corrective Action
Engine won't start	Old fuel, flooded engine	Use fresh fuel mixture; move control to run position and pull starter 10-15 times.
Engine runs then dies	Clogged fuel filter, vent	Replace fuel filter; check tank vent.
Chain doesn't turn	Brake engaged, clutch worn	Disengage chain brake; inspect clutch springs and shoes.
Excessive vibration	Loose components, worn mounts	Tighten all fasteners; check anti-vibration mounts.
Poor cutting performance	Dull chain, improper tension	Sharpen chain; adjust tension per manual.

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

Service: 1-800-467-8445; www.stihlusa.com