The Stihl FS76 is a lightweight, professional-grade straight-shaft grass trimmer/brushcutter designed for demanding vegetation control. It features a powerful 2-stroke engine, anti-vibration system, ErgoStart™ for easy starting, a translucent fuel tank, and a versatile cutting head system. Below are key sections for safety, features, operation, maintenance, and troubleshooting.
Key components: 2-stroke engine, straight shaft, ErgoStart™ system, anti-vibration handles, translucent fuel tank, and quick-release cutting head system.
| Feature | Description |
|---|---|
| Engine Type | 2-stroke, single-cylinder, air-cooled |
| Displacement | 27.2 cc |
| Power Output | 0.9 kW (1.2 bhp) |
| Fuel Tank Capacity | 0.53 liters |
| Weight (without cutting attachment) | Approx. 5.2 kg |
| Starting System | ErgoStart™ (recoil starter) |
| Anti-Vibration System | Integrated dampers in handles and shaft |
| Shaft Type | Straight, solid drive shaft |
| Cutting Attachment System | Quick-release for easy change of trimmer heads or blades |
| Throttle Trigger | With throttle trigger lockout for safety |
Read and understand all instructions before operation. Always wear appropriate PPE.
WARNING! Improper use can cause serious or fatal injury. The cutting attachment continues to rotate after the throttle is released.
Unpack all parts. Assembly requires attaching the handle, cutting attachment, and shoulder strap.
CAUTION! Ensure all fasteners are tight before operation. Do not force attachments.
Master Control Lever: Combines stop switch, choke, and run positions. Throttle Trigger: With lockout. Throttle Trigger Lockout: Must be depressed to allow throttle operation.
Starting Procedure (Cold Engine):
Operation: Engage throttle trigger lockout, then squeeze throttle to desired speed. Use a smooth, sweeping motion when trimming. For brushcutting, use a controlled side-to-side arc.
Stopping: Release throttle and allow engine to return to idle. Move master control lever to STOP (0) position.
Supports various trimmer heads and metal blades.
WARNING! Always shut off engine and ensure it has stopped completely before changing attachments. Inspect blades for cracks or damage before each use.
Fuel Mix: Use only clean, fresh unleaded gasoline with a minimum octane rating of 89 (RON). Mix with a high-quality 2-stroke engine oil meeting STIHL HP Ultra specification at a 50:1 ratio (2% oil). Example: 5 liters gasoline to 0.1 liters oil.
Mixing Instructions:
Gearbox Lubrication: The gearbox at the end of the shaft is filled with grease at the factory. Check periodically for leaks. Regrease annually or after every 50 hours of operation using STIHL gearbox grease.
CAUTION! Never use automotive oil, dirty gasoline, or fuel older than 30 days. Do not mix oil directly in the machine's fuel tank.
| Component | Before Each Use | Every 25 Hours | Every 50 Hours / Season |
|---|---|---|---|
| Air Filter | Check, clean if dirty | Clean thoroughly | Replace if damaged/worn |
| Spark Plug | Check condition | Clean electrode, check gap (0.5mm) | Replace |
| Fuel Filter | - | - | Replace |
| Spark Arrestor Screen (Muffler) | - | Check, clean with brush | Replace if clogged/damaged |
| Gearbox | Check for damage/leaks | - | Regrease |
| Cutting Attachment | Inspect for wear/damage, check tightness | Sharpen metal blades | Replace worn parts |
| External Screws/Nuts | Check tightness | Tighten as needed | - |
Note: More frequent maintenance may be required under severe conditions.
Short-Term (Less than 30 days): Store in a dry, secure location out of reach of children.
Long-Term (Winterization):
CAUTION! Never store the unit with fuel in the tank indoors or in an enclosed space due to fire and fume hazards.
STIHL products are backed by a limited warranty. The specific terms and duration vary by country/region. Proof of purchase from an authorized STIHL dealer is required for warranty service.
What is Covered: Defects in material and workmanship under normal use and maintenance.
What is Not Covered: Damage from misuse, neglect, improper fuel, unauthorized modifications, or lack of maintenance. Normal wear items (spark plugs, filters, cutting line, etc.) are not covered.
To Obtain Service: Contact the authorized STIHL dealer where the product was purchased or your local STIHL service center. For support in the USA, visit www.stihlusa.com or contact 1-800-467-8445.
| Symptom | Possible Cause | Corrective Action |
|---|---|---|
| Engine will not start | 1. No fuel 2. Flooded engine 3. Spark plug faulty 4. Choke position wrong 5. Air filter clogged | 1. Check fuel level, mix. 2. Move control to run, hold throttle open, pull starter many times. 3. Check/replace spark plug. 4. Use choke for cold start only. 5. Clean/replace air filter. |
| Engine starts but dies | 1. Fuel filter clogged 2. Carburetor adjustment 3. Vent in fuel cap blocked | 1. Replace fuel filter. 2. Have dealer adjust carburetor. 3. Clean fuel cap vent. |
| Loss of power | 1. Dirty air filter 2. Spark arrestor screen clogged 3. Old/dirty fuel | 1. Clean air filter. 2. Clean spark arrestor screen. 3. Drain and replace with fresh fuel mix. |
| Excessive vibration | 1. Cutting attachment unbalanced/damaged 2. Loose mounting bolts 3. Bent drive shaft | 1. Inspect and replace damaged blade/head. 2. Tighten all fasteners. 3. Contact authorized service. |
| Line does not advance | 1. Line too short 2. Line tangled in head 3. Worn trimmer head | 1. Pull out more line manually. 2. Disassemble head and rewind line. 3. Replace trimmer head. |
Safety First: Always disconnect the spark plug boot before performing any troubleshooting beyond basic checks.
Service: For repairs beyond basic maintenance, contact an authorized STIHL servicing dealer.