STIHL BG 56, BG 56 C, BG 66, BG 66 C, BG 86, BG 86 C Service Manual

This service manual contains detailed descriptions of all the repair and servicing procedures specific to this power tool. Part numbers can be identified by the STIHL logo.

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Document Details

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Document Number / Seller:
30204 / Joseph Cooper
File Size:
8.23 MB
File Type:
PDF
Language:
English
Printable:
Yes
Category:
Leaf Blower
Last updated / verified
May 28, 2025

Models Covered & Key Technical Specifications

STIHL BG 56, BG 66, BG 86 (2008-01) Comprehensive Service & Repair Manual Documentation-Set STIHL Leaf Blower | BG 56, BG 66, BG 86 Set

  • Documented Bolt Torques: M5 screws are set to 3.5 Nm Benchmarks.
  • Calibrated Volume Data: The filter housing is set to 27.2 cm³ Benchmarks.
  • Authorized Clearance Data: The spark plug gap dictates 0.5 mm Requirements.
  • Core Output Rating: The engine power is set to 0.70 kW (1.0 bhp) for BG 56, SH 56 Requirements.
  • Rated Processing Speed: Idle speed is set to 2500 rpm Benchmarks.
  • Principal Coupling Torques: M8x1 L nuts limit 17.0 Nm Threshold.

Professional Workshop Service Manual & Technical Specifications

STIHL BG 56, BG 66, BG 86 Service Manual

Repair-Classification: STIHL / System-Identifier: BG 56, BG 66, BG 86 / Repair-Classification: Service Manual

Assessment-Element Baseline Validation-Data
Air Filter Housing 27.2 cm³ 0.70 kW (1.0 bhp)
Carburetor Specs 34 mm 5800 rpm
Ignition System 0.5 bar 7200 rpm
Max. Speed 30 mm 2500 rpm
Bore Size 0.15 ... 0.30 mm 0.8 kW (1.1 bhp)
Torque Specs 3.5 Nm 0.5 bar

Following OEM groupings, the manual includes:

  • Introduction
  • Safety Precautions
  • Specifications
  • Troubleshooting
  • Engine
  • Ignition System
  • Rewind Starter
  • Repairing AV System
  • Control Levers
  • Fuel System
  • Blower and Vacuum Attachment
  • Special Servicing Tools
  • Servicing Aids

This comprehensive document provides detailed insights into the BG 56, BG 66, and BG 86 series, covering every aspect from basic maintenance to complex repairs. It includes diagrams and step-by-step instructions for all assemblies and systems, ensuring a structured approach to diagnostics and servicing.

Ignition System

Troubleshooting the ignition system is crucial for engine performance. This manual details procedures for checking the spark plug, ignition module, and related components, offering guidance on fault diagnosis and resolution.

Fuel System

Dive deep into the fuel system's intricacies, from air filter maintenance to carburetor adjustments. The manual covers fuel hose replacement, tank venting tests, and detailed carburetor servicing, including diaphragm and needle valve procedures.

Rewind Starter

Learn to service the rewind starter mechanism, addressing common issues like stiff or slow rope action. The manual provides instructions for removing, cleaning, and installing components such as pawls, springs, and the rope rotor.

Blower and Vacuum Attachment

This section details the maintenance and repair of the blower and vacuum attachments. It includes procedures for removing and installing the intake screen, fan housing, blower tube, and elbow to ensure optimal performance and longevity.

The technical manual documents torque specifications for engine components to ensure proper thermal expansion compensation.

FAQ

Reference the **specified** tool requirements for disassembly. keyboard_arrow_down

Part number 5910 890 4400 is required for the puller assembly, and 1116 893 4800 for the installing tool, as detailed in the manual's special tools section.

What are the **essential** electrical values for the ignition module? keyboard_arrow_down

The ignition module requires a specific air gap between 0.15 to 0.30 mm for proper function, as outlined in the specifications section.

Specify the **correct** calibration settings for the carburetor. keyboard_arrow_down

The low-speed screw (L) should be turned counter-clockwise until the engine runs smoothly, and the high-speed screw (H) should be adjusted to achieve a maximum speed of 14,000 rpm.

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Reviews (3)

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This manual covers everything you need to know about the BG 56. The layout is organized, which makes finding information quick. Downloading was seamless too! I appreciate the professional assistance provided. Definitely worth the investment!
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This manual has been a lifesaver for my STIHL BG 56! The troubleshooting section is especially helpful. I received my download link promptly after purchase, making everything super smooth. Highly recommend!
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I found the repair procedures straightforward and easy to follow. The diagrams really helped clarify things. Plus, the support team was quick to respond when I had a question about my download. Excellent service!