The STIHL SH86C is a professional-grade backpack leaf blower designed for heavy-duty commercial and residential use. This parts manual provides detailed diagrams, part numbers, and ordering information for the complete assembly, engine, fuel system, air filtration, ignition, exhaust, blower tube, harness, and controls of the SH86C model. Below are key sections for identification, assembly groups, ordering, and maintenance.
Identify your unit using the model number and serial number plate located on the blower housing.
| Feature | Description |
|---|---|
| Model | SH86C |
| Type | Backpack Leaf Blower |
| Engine | 2-MIX engine, 27.2 cc |
| Air Speed | Up to 159 mph |
| Air Volume | 441 cfm |
| Fuel Tank Capacity | 40.6 fl. oz. (1.2 liters) |
| Dry Weight | Approx. 20.7 lbs (9.4 kg) |
| Sound Pressure Level | Typically 107 dB(A) |
| Vibration Level | Typically 5.5 m/s² |
| Warranty | Commercial Warranty applies |
Always refer to the original instruction manual for safe operation. Use only genuine STIHL replacement parts.
WARNING! Failure to use correct STIHL parts may void warranty and create unsafe operating conditions.
The unit is divided into major assembly groups for parts identification.
NOTE: Refer to exploded diagrams in Section 11 for visual reference.
Key components: Fuel tank, carburetor, fuel filter, fuel lines, primer bulb, tank cap.
Carburetor: Zama C1Q-S series. Includes diaphragm kits, gaskets, needle valve, and adjustment screws.
Fuel Lines: Supply and return lines. Ensure correct diameter and length.
Fuel Filter: In-tank filter. Replace during regular maintenance.
Primer Bulb: Part of the carburetor assembly or separate component.
Air Filter: Foam filter element. Pre-filter may be included.
Tip: Service air filter more frequently in dusty conditions.
Supports reliable starting and operation.
WARNING! Always disconnect spark plug boot before performing any maintenance.
Muffler Assembly: Includes muffler body, heat shield, gasket, and spark arrestor screen.
Spark Arrestor: Mesh screen inside muffler outlet. Clean regularly to prevent carbon buildup and fire hazard.
Unplug before cleaning. Use dry cloth only; no liquids or aerosols.
CAUTION! Inspect tubes for cracks. Damaged tubes can reduce performance and safety.
Backpack Harness: Includes shoulder straps, waist belt, padded back frame, and quick-release buckles.
Throttle Control: Throttle lever, throttle cable, lockout lever, and cable housing.
Harness Frame: Metal or plastic frame connecting to blower unit.
Padding: Replaceable foam padding for straps and back.
Vibration Dampeners: Rubber mounts between engine and harness frame.
| Component Group | Key Part Numbers (Examples) | Diagram Reference |
|---|---|---|
| Engine Crankcase | 1140 030 2001 (Case Half) | Fig. 1200-1 |
| Carburetor Kit | 1130 007 1050 (Repair Kit) | Fig. 1300-2 |
| Air Filter | 1140 140 2001 (Foam Filter) | Fig. 1400-1 |
| Ignition Module | 1140 400 1401 | Fig. 1500-1 |
| Muffler Assembly | 1140 140 3800 | Fig. 1600-1 |
| Blower Tube | 1140 790 2001 | Fig. 1700-1 |
| Harness Assembly | 1140 790 3100 | Fig. 1800-1 |
Ordering: Contact an authorized STIHL dealer with the model number (SH86C) and the specific part number.
Support: 1-800-467-8445; www.stihlusa.com