STIHL Service Manuals Online

Welcome to the official online resource for STIHL service manuals. This portal provides comprehensive technical documentation, repair guides, and maintenance instructions for the full range of STIHL power tools, including chainsaws, trimmers, blowers, and hedge trimmers. Below are key sections for accessing manuals, understanding product categories, troubleshooting, ordering parts, and technical support.

Manual Categories & Access

Manuals are organized by product type, model series, and publication year for easy retrieval.

Category	Description
Chainsaws	Professional & homeowner models (MS, MSA series)
Trimmers & Brushcutters	Grass trimmers, clearing saws (FS, FSA series)
Blowers & Vacuums	Handheld & backpack blowers (BG, BR series)
Hedge Trimmers	Electric & petrol hedge cutters (HS, HSA series)
Multi-Tools	KombiSystem powerheads & attachments (KM, HLA series)
Sprayers & Dusters	SG series sprayers
Safety Equipment	Protective gear & accessories
Engine Service	2-stroke & 4-stroke engine repair manuals
Electrical Systems	Battery, wiring, and ignition system guides
Illustrated Parts Lists	Exploded views with part numbers

Product Series Overview

STIHL models follow specific series designations. Identify your product series to locate the correct manual.

1. MS Series: Petrol chainsaws (e.g., MS 170, MS 261, MS 661).
2. MSA Series: Battery-powered chainsaws (e.g., MSA 120, MSA 220).
3. FS Series: Petrol trimmers & brushcutters (e.g., FS 38, FS 250).
4. FSA Series: Battery-powered trimmers (e.g., FSA 57, FSA 90).
5. BG/BR Series: Blowers (e.g., BG 50, BR 600).
6. KM Series: KombiSystem multi-tool powerheads.

NOTE: Always verify the model number on the product nameplate before downloading a manual.

Registration & Account Setup

Registered professional users gain access to advanced technical documents and updates.

1. Navigate to the registration page and create an account using your business email.
2. Verify your account via the confirmation link sent to your email.
3. Log in and complete your profile (business type, dealer status optional).
4. Access the full library of service manuals, technical bulletins, and wiring diagrams.

IMPORTANT: Some advanced repair manuals are restricted to certified STIHL servicing dealers.

Search & Navigation

• Search by Model Number: Enter the full model (e.g., "MS 261") in the search bar.
• Browse by Category: Use the product category dropdown menus.
• Filter by Year: Select the manufacture year or manual revision date.
• Quick Links: Access recent manuals or frequently viewed documents.
• Language Selection: Manuals available in multiple languages (English default).

Download & Printing

Manuals are provided in PDF format. Ensure you have Adobe Acrobat Reader or compatible software.

Download Steps:

1. Locate the desired manual using search or browse functions.
2. Click the "Download PDF" button associated with the manual.
3. Save the file to your local device or cloud storage.
4. Open the PDF to view, or select "Print" for a physical copy.

Printing Tips: For best results, use "Actual Size" printing and high-quality paper for diagrams. Consider printing specific sections (e.g., torque specifications, exploded views) for workshop use.

Safety & Operation Guidelines

Every manual includes critical safety information. Never perform service without reviewing these sections.

Section	Content
Safety Symbols & Meanings	Explanation of warning, caution, and note icons.
Personal Protective Equipment (PPE)	Required safety gear for operation and maintenance.
Safe Starting & Handling	Procedures to avoid kickback, loss of control.
Fuel & Battery Safety	Handling petrol, oil, and lithium-ion batteries.
Workshop Safety	Proper ventilation, tool use, and fire prevention.

WARNING: Disregarding safety instructions can result in serious injury or death. Always follow the manual.

Maintenance Schedules

Regular maintenance is essential for performance, longevity, and safety. Refer to the manual for interval-based tasks.

1. Daily/Pre-Use: Check for loose fasteners, chain sharpness (saws), air filter condition.
2. Weekly/Monthly: Clean cooling fins, inspect spark plug, check fuel lines.
3. Seasonal/Annual: Replace fuel filter, clean carburetor, check piston/cylinder condition.
4. As Needed: Chain tensioning, bar maintenance, drive shaft lubrication (trimmers).

Tip: Keep a maintenance log with dates and parts replaced for each tool.

Troubleshooting & Diagnostics

Structured troubleshooting guides help diagnose common engine and mechanical problems.

Symptom	Possible Cause	Corrective Action
Engine won't start	Fuel issues, spark plug, ignition system	Check fuel mix, replace spark plug, test ignition coil.
Loss of power	Clogged air filter, exhaust screen, carburetor	Clean/replace air filter, clean spark arrestor screen, adjust carburetor.
Chain/trimming head doesn't turn	Drive system, clutch, gearbox	Inspect clutch shoes, drive shaft, gearbox for wear/damage.
Excessive vibration	Unbalanced cutting attachment, loose parts	Balance cutting head/chain, tighten all mounting fasteners.
Battery tool not holding charge	Battery age, charger fault, tool electronics	Test battery capacity, check charger output, inspect tool PCB.

Advanced Diagnostics: Some manuals include diagnostic flowcharts and specifications for pressure/vacuum testing.

Parts Diagrams & Ordering

Exploded views with numbered parts lists are included for accurate identification and ordering.

1. Locate the "Illustrated Parts List" section in your model's manual.
2. Identify the group number (e.g., 1110 for Cylinder Group) and the individual part number.
3. Use the part number to order genuine STIHL parts through an authorized dealer.
4. Cross-reference updates; part numbers may supersede older versions.

CAUTION: Use only genuine STIHL parts to maintain warranty, performance, and safety certifications.

Technical Specifications

Key specifications for service and repair reference.

• Engine Displacement: Ranges from 22.2cc (MS 170) to 121.6cc (MS 881).
• Power Output: kW/hp ratings for various models.
• Fuel/Oil Mix: Standard 50:1 ratio for most 2-stroke engines (ISO-L-EGD/ISO-FD quality).
• Ignition System: Electronic, breakerless magneto ignition specifications.
• Torque Specifications: Critical fastener torque values (cylinder bolts, clutch, sprocket).
• Battery Systems: Voltage (10.8V, 36V) and capacity (Ah) for AK/Ap series batteries.

Support & Contact

For further assistance with manuals or technical issues.

STIHL Technical Support Website: www.stihlusa.com/service-support/

Telephone Support: 1-800-467-8445 (USA). Hours: Mon-Fri, 8am-8pm EST.

Find a Dealer: Use the dealer locator on the STIHL website for local service centers.

Manual Updates: Check the website periodically for revised manuals and service bulletins.

Feedback: Report errors or suggest improvements via the "Contact Us" form on the website.