The Stihl BG86C is a professional-grade backpack blower designed for demanding commercial and residential use. This parts manual provides detailed diagrams, part numbers, and ordering information for the complete assembly and components of the BG86C blower, including the engine, fan housing, throttle controls, harness system, fuel system, and muffler. Below are key sections for identification, engine parts, blower assembly, controls, fuel system, and ordering.
This manual is intended for qualified technicians for parts identification and replacement. Always use genuine Stihl parts to ensure performance, safety, and warranty compliance.
| Safety Symbol | Meaning |
|---|---|
| ⚠️ | General Warning - Read manual before operation or maintenance |
| 🔥 | Fire Hazard - Keep away from flammable materials |
| 🛑 | Stop Engine - Before inspecting or replacing parts |
| 🔧 | Use Correct Tools - For safe disassembly/reassembly |
WARNING! Disconnect spark plug boot before performing any maintenance or parts replacement to prevent accidental starting.
Locate the model identification plate on the blower housing. The BG86C model number and serial number are required for ordering correct parts.
Note: Always verify serial number when ordering parts.
Reference diagram showing major component groups and their relationship.
CAUTION! Refer to torque specifications when reassembling components.
| Part Number | Description | Qty |
|---|---|---|
| 1128 140 2000 | Cylinder | 1 |
| 1128 030 2001 | Piston Assembly | 1 |
| 1128 030 4800 | Piston Ring | 1 |
| 1128 140 4801 | Crankshaft | 1 |
| 1128 140 4802 | Connecting Rod | 1 |
| 1128 140 4803 | Main Bearing Set | 1 set |
| 1128 140 4804 | Crankcase Half (Left) | 1 |
| 1128 140 4805 | Crankcase Half (Right) | 1 |
| 1128 140 4806 | Ignition Module | 1 |
| 1128 140 4807 | Spark Plug (Bosch WSR6F) | 1 |
Note: Engine components must be replaced as matched sets where specified.
Components responsible for air movement and discharge.
WARNING! Always check impeller for cracks or damage. Replace if damaged to prevent failure.
Control interface and operator support system.
| Part Number | Description |
|---|---|
| 1128 140 5000 | Throttle Trigger Assembly |
| 1128 140 5001 | Throttle Cable |
| 1128 140 5002 | Throttle Lock Lever |
| 1128 140 5003 | Handle Assembly (Complete) |
| 1128 140 5004 | Harness Backpack Frame |
| 1128 140 5005 | Shoulder Straps (Pair) |
| 1128 140 5006 | Waist Belt |
| 1128 140 5007 | Quick-Release Buckle |
| 1128 140 5008 | Vibration Dampeners |
Tip: Lubricate throttle cable ends during installation.
Components for fuel storage and delivery.
CAUTION! Use only fresh, clean gasoline with Stihl 2-stroke oil mix (50:1).
Exhaust system components for noise reduction and spark arrest.
| Part Number | Description | Notes |
|---|---|---|
| 1128 140 5200 | Muffler Assembly (Complete) | Includes spark arrestor screen |
| 1128 140 5201 | Muffler Cover | Heat shield |
| 1128 140 5202 | Exhaust Gasket | Fiber material |
| 1128 140 5203 | Spark Arrestor Screen | USDA Forest Service approved |
| 1128 140 5204 | Muffler Mounting Bolts | M6 x 25mm (2 required) |
| 1128 140 5205 | Heat Deflector | Protects plastic components |
Important: Clean spark arrestor screen regularly to prevent overheating.
Common screws, nuts, and washers used throughout assembly.
Note: Use thread locker on critical fasteners as specified in service manual.
Common replacement items for routine maintenance.
Recommended: Keep maintenance kit with commonly replaced parts.
How to order genuine Stihl parts for the BG86C.
| Step | Action | Details |
|---|---|---|
| 1 | Identify Part | Use exploded diagrams and part numbers from this manual |
| 2 | Record Information | Note: Part number, description, quantity needed |
| 3 | Contact Dealer | Provide: Model (BG86C), Serial Number, Part Numbers |
| 4 | Verify Availability | Check stock and estimated delivery time |
| 5 | Order Parts | Provide payment and shipping information |
| 6 | Receive & Verify | Check received parts against order before installation |
Stihl Support: For technical assistance or to locate a dealer, visit www.stihlusa.com or call 1-800-467-8445.
Warranty: Use of non-genuine Stihl parts may void warranty and affect performance.