Stihl Autocut 5-2 Manual

The Stihl Autocut 5-2 is a professional-grade trimmer head designed for efficient line feeding during grass and weed trimming. Compatible with various Stihl trimmer models, it features an automatic line advance system (Tap 'n Go), a durable cutting head with reinforced components, a transparent guard for line monitoring, and easy reloading. Below are key sections for safety, features, installation, operation, maintenance, and troubleshooting.

Features at a Glance

Key components: Autocut 5-2 cutting head, pre-wound spool, bump knob, locking mechanism, transparent guard, and mounting hardware.

Feature	Description
Automatic line advance	Tap 'n Go system for easy line feeding during operation
Reinforced cutting head	Durable construction for extended service life
Transparent guard	Allows visual monitoring of remaining line
Easy reload system	Quick spool replacement without tools
Bump knob	For manual line advance if needed
Compatible line diameter	Designed for 2.0mm trimmer line
Locking mechanism	Secures head to trimmer drive shaft
Pre-wound spools	Available for quick replacement
High-impact housing	Resists damage from debris and impacts
Balanced design	Reduces vibration for comfortable operation

Installation

Unpack and inspect contents. Ensure trimmer is turned off and spark plug disconnected.

1. Remove old cutting head: Hold drive shaft stationary and rotate head counterclockwise.
2. Clean drive shaft threads: Remove any debris from threads.
3. Install Autocut 5-2: Thread onto drive shaft clockwise and hand-tighten securely.
4. Secure with locking mechanism: Engage lock to prevent loosening during operation.
5. Install guard: Attach transparent guard using provided screws.

WARNING! Always disconnect spark plug before installation to prevent accidental starting. Wear protective gloves.

First-Time Setup

After installation, prepare for first use.

1. Load trimmer line: Insert ends of line through eyelets in cutting head.
2. Wind spool: Follow directional arrows; leave approximately 6 inches of line extended.
3. Test automatic advance: Start trimmer at idle and gently tap head on ground.
4. Adjust line length: Trim to desired length (recommended 5-6 inches).
5. Check guard alignment: Ensure guard does not interfere with line movement.

CAUTION! Keep hands and feet clear of cutting area during testing. Operate in clear, open space.

Specifications

• Model: Autocut 5-2
• Compatibility: Stihl trimmer models FS 38, FS 45, FS 55, FS 56, FS 70, FS 85, FS 86, FS 90, FS 100, FS 110
• Line Diameter: 2.0 mm (0.080 inch)
• Line Capacity: Approximately 15 feet of dual-line
• Advance System: Automatic Tap 'n Go with manual bump option
• Housing Material: High-impact polymer with metal reinforcement
• Weight: 0.45 lbs (204 grams)
• Operating Speed: Up to 10,000 RPM
• Warranty: 1 year limited warranty

Controls and Operation

Operation is simple with automatic line advance feature.

Starting Procedure: Ensure trimmer is on firm ground, start engine according to trimmer manual.

Automatic Advance: While trimming at operating speed, gently tap cutting head on ground to advance fresh line.

Manual Advance: If needed, press bump knob against ground while head is rotating to feed line manually.

Cutting Technique: Use sweeping motion from side to side, keeping cutting head parallel to ground. Avoid forcing head into dense vegetation.

Stopping: Release throttle trigger, allow head to stop completely before setting trimmer down.

Line Replacement

Replace line when less than 2 inches remains or line becomes worn.

1. Stop trimmer and disconnect spark plug.
2. Remove spool: Press locking tabs and lift spool from housing.
3. Remove old line: Discard worn line.
4. Load new line: Insert ends through eyelets, wind following directional arrows.
5. Reinstall spool: Align tabs with slots, press until it clicks into place.
6. Pull line ends: Extend approximately 6 inches of line through eyelets.
7. Trim line: Cut to even length (5-6 inches recommended).

Tip: Use only Stihl 2.0mm trimmer line for optimal performance and to prevent jamming.

Maintenance

Regular maintenance ensures optimal performance and longevity.

1. Daily: Clean cutting head of grass and debris after use.
2. Weekly: Inspect for cracks or damage; check line eyelets for wear.
3. Monthly: Lubricate drive shaft threads with light machine oil.
4. Seasonally: Replace entire spool if housing shows significant wear.
5. Storage: Remove spool and clean thoroughly before long-term storage.

WARNING! Always disconnect spark plug before performing any maintenance. Never attempt to modify cutting head.

Safety Features

Transparent guard: Protects operator from debris and allows line monitoring. Locking mechanism: Prevents accidental detachment. Automatic brake: Stops line rotation within seconds of releasing throttle. Warning labels: Indicate proper operation and maintenance procedures.

Care & Storage

Clean after each use with dry cloth. Store in dry location away from direct sunlight and extreme temperatures.

CAUTION! Do not use high-pressure water or solvents for cleaning. Never store with fuel in trimmer.

Regulatory Information

CE certified for European market. Meets ANSI B175.3 standards for outdoor power equipment. Copyright © Stihl Incorporated; all rights reserved. For genuine Stihl parts and accessories, contact authorized Stihl dealers only. For support, visit www.stihlusa.com or contact 1-800-467-8445.

Troubleshooting

Symptom	Possible Cause	Corrective Action
Line not advancing	Empty spool/tangled line	Replace spool; rewind line properly; clean eyelets.
Excessive vibration	Unbalanced spool/damaged head	Rewind line evenly; inspect for damage; replace if cracked.
Line breaking frequently	Wrong line diameter/eyelet wear	Use only 2.0mm Stihl line; replace worn eyelets or entire head.
Head won't stay attached	Worn threads/improper installation	Check drive shaft threads; replace if stripped; tighten securely.
Poor cutting performance	Dull line/incorrect length	Advance fresh line; trim to 5-6 inches; replace spool.
Automatic advance not working	Dirty mechanism/spring issue	Clean interior; check advance spring; replace spool if damaged.

Service: For repairs, contact authorized Stihl service center. Do not attempt to repair damaged cutting head.

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