Stihl Autocut 5 10 11 Manual

The Stihl Autocut 5, 10, and 11 are professional-grade grass trimmers/brushcutters designed for efficiency and durability. These models feature a semi-automatic cutting head line feed system (Autocut), robust engines, anti-vibration systems, and ergonomic designs for extended use. Below are key sections covering 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. Cutting Head & Line Feed 7. Maintenance Schedule 8. Safety Features 9. Storage & Transport 10. Warranty Information 11. Troubleshooting

Features at a Glance

Key components: Engine unit, Drive shaft, Cutting head (Autocut system), Handlebar, Harness, Safety guard.

Feature	Description
Autocut Cutting Head	Semi-automatic line feed system for continuous cutting
Engine Type	2-stroke gasoline engine (specific to model 5, 10, or 11)
Anti-Vibration System	Reduces operator fatigue during extended use
Ergonomic Handlebar	Adjustable for user comfort and control
QuickStop Inertia Chain Brake	Safety feature that stops cutting head rapidly
Fuel Tank	Integrated with easy-fill cap
Throttle Trigger	With lockout to prevent accidental acceleration
Starter Grip	Rewind starter for easy engine starting
Debris Shield	Protects operator from thrown debris
Harness Attachment Points	For comfortable shoulder carrying

Assembly & Preparation

Unpack all parts and inspect for damage. Assemble on a clean, flat surface.

Attach the handlebar: Align with mounting points on the shaft and secure with provided bolts.
Install the harness: Connect harness loops to attachment points on the machine.
Fit the cutting head guard: Secure over the cutting head using the designated fastener.
Prepare fuel mix: Use high-quality 2-stroke oil mixed with unleaded gasoline as specified (e.g., 50:1).

WARNING! Always wear protective gloves during assembly. Ensure all fasteners are tightened securely.

First-Time Operation

Before starting, ensure you are wearing appropriate PPE: safety glasses, gloves, long pants, and sturdy boots.

Fuel the machine: Fill the tank with the correct fuel/oil mixture.
Prime the engine (if equipped): Press the primer bulb several times.
Set the choke: Move lever to START position for cold engine.
Start the engine: Place on ground, hold securely, pull starter cord briskly.
Warm up: Allow engine to run at idle for a short period before applying throttle.
Engage cutting head: Squeeze throttle trigger to desired speed.

CAUTION! Never operate without the debris shield properly installed. Keep bystanders at a safe distance.

Specifications

Model Series: Autocut 5, Autocut 10, Autocut 11.
Engine Displacement: Varies by model (approx. 25cc - 31cc).
Fuel: Unleaded gasoline mixed with 2-stroke oil (ratio per manual).
Cutting Width: Up to 17 inches (430mm) with standard line head.
Drive System: Flexible drive shaft.
Weight (without fuel): Approx. 5.1 - 5.7 kg (varies by model).
Sound Power Level: Complies with relevant directives (e.g., 116 dB(A) typical).
Vibration Levels: Front/Rear handle values as per EN ISO 5349.

Controls and Functions

Main controls located on the handlebar. Throttle Trigger: Controls engine speed. Throttle Trigger Lockout: Must be depressed to allow throttle operation. Stop Switch: Moves to STOP position to shut off engine. Choke Lever: For cold starting. Primer Bulb: (If equipped) to draw fuel into carburetor.

Adjustments: Handlebar angle can be adjusted for user preference. Harness can be adjusted for balance and comfort.

Cutting Head & Line Feed

The Autocut head automatically feeds line as needed during operation.

Loading line: Unlock head, remove spool, wind new line onto spool following directional arrows, reassemble.
Manual feed: Tap head gently on ground while engine is at high idle to advance line.
Line length: Do not let line extend beyond the cutting guard. Trim excess if necessary.
Head inspection: Regularly check for wear, cracks, or damage. Replace if damaged.

Tip: Use only Stihl recommended nylon line diameter for optimal performance and feed.

Maintenance Schedule

Supports long life with regular maintenance.

After each use: Clean exterior, check for loose parts.
Air filter: Clean weekly or more often in dusty conditions; replace when worn.
Spark plug: Check and clean every 25 operating hours; replace as needed.
Fuel filter: Replace every season or if clogged.
Gearbox grease: Lubricate per manual interval (e.g., every 50 hours).
Cutting head: Inspect spool and housing for wear; replace components as required.

WARNING! Always disconnect the spark plug cap before performing any maintenance. Allow engine to cool.

Safety Features

QuickStop Inertia Chain Brake: Stops cutting head within seconds if kickback occurs. Throttle Trigger Lockout: Prevents accidental throttle engagement. Debris Shield: Essential protective barrier. Anti-Vibration System: Reduces long-term exposure to vibration.

Storage & Transport

For storage longer than 30 days: Drain fuel tank and run carburetor dry. Store in a cool, dry place, out of reach of children.

CAUTION! Fuel is flammable. Store fuel mix in an approved container away from sparks or flame. Secure machine during transport to prevent movement.

Warranty Information

Stihl limited warranty applies to original purchaser. Proof of purchase required. Warranty covers defects in materials and workmanship under normal use. Does not cover damage from misuse, neglect, improper maintenance, or unauthorized repairs. For warranty service, contact an authorized Stihl servicing dealer. For support, visit www.stihl.com or contact your local Stihl dealer.

Troubleshooting

Symptom	Possible Cause	Corrective Action
Engine will not start	No fuel, flooded, spark plug	Check fuel level; wait if flooded; check/clean spark plug.
Engine runs but dies	Clogged air/fuel filter, carburetor	Clean or replace air/fuel filter; have carburetor serviced.
Line does not feed	Empty spool, tangled line, worn head	Reload line; untangle or replace spool; inspect head for wear.
Excessive vibration	Loose parts, bent shaft, unbalanced head	Tighten all fasteners; inspect shaft and head for damage.
Loss of power	Dirty exhaust screen, carbon buildup	Clean spark arrestor screen; decarbonize exhaust port (by dealer).

Service: For repairs beyond basic maintenance, take to an authorized Stihl dealer.

Dealer Locator: www.stihl.com