Stihl HS 74 Hedge Trimmer Manual

The Stihl HS 74 is a professional-grade, lightweight hedge trimmer designed for precise trimming and shaping of hedges and shrubs. It features a powerful 2-stroke engine, double-sided laser-cut blades, an anti-vibration system, and ergonomic handles for comfortable operation. Below are key sections covering safety, features, assembly, operation, maintenance, and troubleshooting.

Features at a Glance

Key components: 2-stroke engine, double-sided laser-cut blades, anti-vibration system, ergonomic front and rear handles, translucent fuel tank, and easy-start system.

Safety Instructions

Read all instructions before operation. Always wear appropriate personal protective equipment (PPE).

1. Wear safety glasses, hearing protection, gloves, long pants, and sturdy boots.
2. Inspect the work area for obstacles, power lines, or bystanders.
3. Ensure the trimmer is on a stable surface before starting.
4. Keep hands and feet away from blades at all times.
5. Never operate the trimmer with damaged or loose parts.

WARNING! Risk of serious injury or death from blade contact or thrown objects. Always maintain a firm grip and secure footing.

Assembly & Preparation

Unpack and inspect all parts. Assembly requires basic tools.

1. Attach the handle: Secure the rear loop handle to the shaft using provided bolts.
2. Install the blade guard: Place the blade guard over the blades for transport and storage.
3. Mix fuel: Use STIHL 2-stroke engine oil mixed with unleaded gasoline (50:1 ratio).
4. Fill fuel tank: Use a fuel can with a spout; avoid spills.
5. Fill bar and chain oil tank: Use STIHL hedge trimmer oil or equivalent.

CAUTION! Fuel is highly flammable. Mix and fill in a well-ventilated area away from sparks or flames.

Specifications

• Model: HS 74
• Engine Displacement: 1.6 cu in (26.4 cc)
• Power Output: 1.0 hp (0.75 kW)
• Blade Length: 24 in (60 cm)
• Tooth Spacing: 0.8 in (20 mm)
• Max. Cutting Diameter: 0.8 in (20 mm)
• Weight (without fuel): 10.1 lbs (4.6 kg)
• Fuel/Oil Ratio: 50:1 (STIHL 2-MIX oil)
• Vibration Level (front/rear): 4.5/2.5 m/s²
• Sound Power Level: 106 dB(A)

Controls and Operation

Familiarize yourself with all controls before starting.

Controls: On/Off switch, throttle trigger with lockout, choke lever, primer bulb, fuel valve, and decompression valve (if equipped).

Starting Procedure:

1. Move to a clear, flat area. Engage the chain brake.
2. Set the master control lever to cold start position (choke on).
3. Press the primer bulb 5-10 times until fuel is visible.
4. Hold the unit firmly, pull the starter rope briskly until engine fires.
5. Move master control to half-throttle position, pull until engine starts.
6. Allow engine to warm up at idle for 30 seconds before use.

Operating Tips: Use a smooth, sweeping motion. Cut from bottom to top for best results. Avoid forcing the blades.

Fuel & Lubrication

Use fresh, unleaded gasoline with a minimum octane rating of 89. Mix with STIHL 2-MIX engine oil at 50:1 ratio.

1. Always mix fuel in a clean, approved container.
2. Shake container gently to ensure proper mixing.
3. Fill fuel tank before operation. Do not overfill.
4. Lubricate blades before and during operation using the manual oiler button.

Tip: Use only high-quality, air-cooled 2-stroke engine oil. Do not use automotive motor oil.

Playing DVD Media

This section is not applicable to the Stihl HS 74 Hedge Trimmer. Please refer to the relevant sections for operation and maintenance.

Accessibility Features

This section is not applicable to the Stihl HS 74 Hedge Trimmer. Please refer to the Safety and Controls sections for proper handling.

Care & Cleaning

Proper cleaning extends tool life and ensures safe operation.

1. Allow engine to cool completely before cleaning.
2. Wipe exterior with a clean, dry cloth.
3. Clean air intake and cooling fins with a soft brush.
4. Remove debris from blades using a stiff brush or wooden stick.
5. Inspect for damage or loose parts after cleaning.

CAUTION! Never use water, solvents, or high-pressure cleaners. Avoid getting moisture into the air filter or engine.

Regulatory Information

This product complies with relevant EPA and CARB emissions standards for handheld outdoor power equipment. The STIHL HS 74 meets applicable ANSI safety standards. STIHL is a registered trademark of Andreas Stihl AG & Co. KG. For genuine parts, accessories, and service, contact an authorized STIHL dealer. For support, visit www.stihlusa.com or call 1-800-467-8445.

Troubleshooting

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

Dealer Locator: 1-800-467-8445; www.stihlusa.com