FS56RC Stihl Manual

The FS56RC is a lightweight, professional-grade gasoline-powered string trimmer/brushcutter from Stihl, featuring a loop handle for easy maneuverability, a bicycle-style throttle trigger, a translucent fuel tank, a QuickStop inertia-activated chain brake, a side-mounted choke, and a 2-MIX engine technology for reduced emissions and fuel consumption. Below are key sections for safety, features, assembly, operation, maintenance, and troubleshooting.

Features at a Glance

Key components: 2-MIX engine, Loop handle, Bicycle-style throttle trigger, Translucent fuel tank, QuickStop inertia-activated chain brake, Side-mounted choke, and a standard cutting head.

Feature	Description
2-MIX Engine	Reduces fuel consumption and exhaust emissions
Loop Handle	Provides comfortable, two-handed control
Bicycle-style Throttle Trigger	Easy to operate with index finger
Translucent Fuel Tank	Allows for easy fuel level monitoring
QuickStop Inertia-Activated Chain Brake	Stops cutting attachment in event of kickback
Side-mounted Choke	Simplifies cold starting procedure
Cutting Head	Standard bump-feed trimmer head
Stop Switch	Immediately stops engine
Throttle Trigger Lockout	Prevents accidental throttle engagement
Spark Arresting Muffler	Reduces fire hazard from exhaust sparks

Assembly & Preparation

Unpack and inspect all contents. Assemble on a clean, flat surface.

1. Attach handle: Align handle with mounting points on shaft and secure with provided bolts.
2. Install cutting attachment: Ensure engine is off. Attach trimmer head or blade per instructions.
3. Fuel mix: Use STIHL 2-MIX engine oil mixed with unleaded gasoline (50:1 ratio).
4. Fill fuel tank: Use clean fuel mix; do not overfill.

WARNING! Always wear appropriate personal protective equipment (PPE) including eye protection, hearing protection, gloves, long pants, and sturdy boots.

First-Time Operation

Before starting, ensure unit is on a flat, clear surface away from people and flammable materials.

1. Starting procedure: Set stop switch to "I". Press fuel pump bulb 5 times. Set choke lever to cold start position. Pull starter rope briskly until engine fires. Move choke lever to run position. Pull starter rope again to start.
2. Warm-up: Allow engine to idle for 30 seconds before applying throttle.
3. Adjust harness: If using a harness, adjust for comfortable fit and balance.
4. Test controls: Ensure throttle trigger, lockout, and stop switch function properly.

CAUTION! Never start the engine indoors or in poorly ventilated areas due to carbon monoxide risk.

Specifications

• Engine Type: STIHL 2-MIX, single-cylinder, air-cooled.
• Displacement: 27.2 cc.
• Power Output: 0.9 kW / 1.2 hp.
• Fuel/Oil Ratio: 50:1 (STIHL 2-MIX engine oil).
• Fuel Tank Capacity: 0.42 liters.
• Sound Pressure Level: Typically 96 dB(A).
• Vibration Levels: Front/Rear handle values per applicable standards.
• Cutting Attachment: Standard bump-feed trimmer head.
• Drive System: Flexible shaft.
• Weight (without cutting attachment): Approximately 5.2 kg.

Controls and Settings

Main Controls: Stop Switch (I/O), Throttle Trigger with Lockout, Choke Lever, Fuel Pump Bulb, Starter Grip.

Operation: Throttle trigger controls engine speed. Lockout must be depressed to engage throttle. Stop switch stops engine immediately. Choke lever has three positions: Run, Cold Start, and Half Choke (for warm restart).

Adjustments: Handle position can be adjusted for operator comfort. Harness attachment points are provided.

Attaching Accessories

Compatible with various Stihl trimmer heads and brushcutting blades.

1. Ensure engine is off and spark plug boot is disconnected.
2. Remove standard cutting head by unscrewing retaining nut (clockwise to loosen, counter-clockwise to tighten - may vary).
3. Install desired accessory following specific accessory instructions.
4. Reconnect spark plug boot before starting.

Tip: Always use the correct guard for the accessory being installed.

Operating Procedures

For trimming grass and light vegetation.

1. Starting: Follow cold or warm start procedure.
2. Trimming technique: Use a smooth, sweeping motion from side to side, keeping cutting head parallel to ground.
3. Line advance: Tap cutting head on ground (bump-feed) while at high idle to advance trimmer line.
4. Shut down: Release throttle and allow engine to idle for 30 seconds. Press stop switch to "O".
5. Clearing debris: Always shut off engine and disconnect spark plug before clearing debris from cutting head.

WARNING! Never operate unit without proper guard in place. Keep bystanders and pets at least 15 meters away.

Safety Features

QuickStop Inertia-Activated Chain Brake: Automatically stops cutting attachment if kickback occurs. Throttle Trigger Lockout: Prevents accidental throttle engagement. Stop Switch: Immediate engine shut-off. Spark Arresting Muffler: Reduces fire risk.

Care & Maintenance

Perform maintenance only when engine is off and cool. Disconnect spark plug boot.

Daily: Clean exterior, check for loose fasteners, inspect cutting attachment for damage.

Weekly/Monthly: Clean air filter, check spark plug, clean cooling fins, inspect fuel filter.

Annually: Have unit serviced by an authorized STIHL dealer.

CAUTION! Use only STIHL branded parts and accessories. Improper maintenance can void warranty and create safety hazards.

Regulatory Information

Complies with applicable ANSI, EPA, and CARB standards for handheld outdoor power equipment. This product incorporates emissions control technology. STIHL and the STIHL logo are registered trademarks of Andreas Stihl AG & Co. KG. For genuine parts, accessories, and service, contact an authorized STIHL dealer. For support, visit www.stihlusa.com or contact STIHL Incorporated at 1-800-467-8445.

Troubleshooting

Symptom	Possible Cause	Corrective Action
Engine will not start	No fuel, flooded, spark plug	Check fuel level; ensure choke is in correct position; check/replace spark plug.
Engine runs poorly or stalls	Dirty air filter, old fuel	Clean or replace air filter; use fresh fuel mix.
Excessive vibration	Loose parts, bent shaft	Tighten all fasteners; inspect shaft for damage.
Line does not advance	Empty spool, tangled line	Refill spool with correct line; clear tangles.
Loss of power	Clogged fuel filter, exhaust screen	Replace fuel filter; clean spark arrestor screen.

Dealer Service: For repairs beyond basic maintenance, contact an authorized STIHL dealer.

Customer Support: 1-800-467-8445; www.stihlusa.com