The STIHL F5 45 C is a professional-grade, lightweight, and powerful brushcutter designed for demanding vegetation management. It features a 45.4 cc STIHL engine with electronic ignition, an anti-vibration system, a comfortable harness, a straight shaft with a gearbox, and a versatile cutting head for nylon line and optional metal blades. Below are key sections for safety, features, assembly, operation, maintenance, and troubleshooting.
Key components: 45.4 cc 2-MIX engine, Ergonomic handle with master control lever, Anti-vibration system, Straight shaft with gearbox, QuickStop® inertia chain brake (if equipped with cutting blade), Comfortable carrying system.
| Feature | Description |
|---|---|
| Engine | 45.4 cc STIHL 2-MIX engine for reduced fuel consumption and emissions |
| Ignition | Electronic ignition (CDI) for reliable starting |
| Anti-Vibration | Integrated system to reduce operator fatigue |
| Shaft | Straight solid shaft with gearbox for power transmission |
| Handle | Ergonomic loop handle with master control lever (throttle trigger, stop switch) |
| Fuel System | Transparent fuel tank with integrated fuel pump |
| Starter | Rewind starter with decompression valve |
| Cutting Head | STIHL AutoCut C 5-2 line head or compatible blade options |
| Carrying System | Comfortable harness for balanced weight distribution |
| Weight | Approx. 6.8 kg (without cutting attachment) |
Read and understand all instructions before use. Always wear appropriate PPE.
WARNING! Risk of serious injury or death from blade contact, thrown objects, or fire. Never operate without proper training and PPE.
Unpack and inspect all parts. Assemble according to instructions.
CAUTION! Ensure all fasteners are tight before operation. Do not force components during assembly.
Master Control Lever: Combines choke, throttle trigger interlock, and stop switch functions. Throttle Trigger: Controls engine speed. Throttle Trigger Interlock: Must be depressed to operate throttle. Stop Switch: Moves to "0" or "STOP" to shut off engine. Decompression Valve: Reduces pulling force for starting. Primer Bulb: For easier cold starting. Choke Lever: Integrated into master control for cold starts.
Main Components: Engine, Fuel Tank, Air Filter, Muffler, Rewind Starter, Gearbox, Shaft, Handle, Carrying System Attachment Points.
Starting, Operation, and Stopping Procedures.
Tip: For best performance and longevity, always operate at full throttle when cutting.
Supports various line heads and metal blades for different vegetation.
WARNING! Always use STIHL-approved cutting attachments and ensure they are correctly installed and balanced. Never use damaged blades or line heads.
Regular maintenance ensures safety, performance, and long life. Perform daily checks and periodic servicing.
| Item | Frequency | Action |
|---|---|---|
| Air Filter | Daily/As needed | Clean with compressed air or soft brush. Replace if damaged or very dirty. |
| Spark Plug | Every 50 hours | Clean electrode, check gap (0.5 mm / 0.020 in). Replace if worn. |
| Fuel Filter | Every 3 months | Replace in-tank fuel filter. |
| Gearbox Grease | Every 25 hours | Add STIHL special grease through grease nipple. |
| Spark Arrestor Screen | Every 100 hours | Remove from muffler, clean carbon deposits, reinstall. |
| External Cleaning | After each use | Wipe down with a clean cloth. Keep cooling fins and air intake clear. |
| Fasteners & Guards | Before each use | Check for tightness and integrity. |
CAUTION! Always disconnect the spark plug boot before performing any maintenance except refueling.
For storage longer than 30 days, prepare unit to prevent fuel system damage.
CAUTION! Never store unit with fuel in the tank for extended periods. Old fuel can damage engine components.
STIHL Limited Warranty: Covers defects in materials and workmanship for a specified period from date of retail purchase. Proof of purchase required. Warranty does not cover normal wear, misuse, lack of maintenance, or use of non-STIHL parts/fuel. For technical support, genuine parts, and service, contact an authorized STIHL servicing dealer. Find a dealer at www.stihlusa.com or call 1-800-467-8445.
| Symptom | Possible Cause | Corrective Action |
|---|---|---|
| Engine will not start | No fuel, flooded engine, spark plug faulty, master control position wrong | Check fuel level. Set master control to warm start and pull starter rope with throttle open (to clear flood). Check/clean/replace spark plug. |
| Engine starts but dies | Clogged fuel filter, dirty air filter, carburetor adjustment | Replace fuel filter. Clean air filter. Have carburetor adjusted by authorized dealer. |
| Loss of power | Clogged air filter, dirty spark arrestor, old fuel | Clean air filter and spark arrestor screen. Use fresh fuel mix. |
| Excessive vibration | Damaged cutting attachment, loose fasteners, bent shaft | Inspect and replace damaged blade/head. Tighten all bolts/nuts. Check shaft for damage. |
| Cutting head does not advance line | Line too short, spool jammed, worn parts | Tap head on ground (engine off). Disassemble head, clean, and reload with new line. Replace worn spool or cover. |
| Gearbox overheating | Low grease level, incorrect attachment, excessive load | Add STIHL special grease. Ensure correct attachment is used. Avoid overloading the tool. |
Note: For repairs beyond basic maintenance, contact an authorized STIHL servicing dealer.
Service & Parts: 1-800-467-8445; www.stihlusa.com