Stihl 4226 358 0705 Fuel Line Instruction Manual

1. Introduction

This manual provides essential information for the proper installation, operation, and maintenance of the Stihl 4226 358 0705 Fuel Line. This genuine OEM part is designed to ensure optimal performance and compatibility with Stihl HS72, HS74, HS75, HS76, and HS85 series hedgetrimmers. Adhering to these instructions will help maintain the efficiency and longevity of your equipment.

Figure 1: The Stihl 4226 358 0705 Fuel Line, a genuine replacement component.

2. Safety Precautions

Always prioritize safety when working with fuel systems and power equipment. Failure to follow safety guidelines can result in serious injury or damage to property.

• Ensure the hedgetrimmer engine is off and cool before beginning any work.
• Disconnect the spark plug wire to prevent accidental starting.
• Work in a well-ventilated area to avoid inhaling fuel fumes.
• Wear appropriate personal protective equipment (PPE), including safety glasses and gloves.
• Handle fuel with extreme care. Avoid spills and keep away from open flames or ignition sources.
• Dispose of old fuel and parts responsibly according to local regulations.

3. Package Contents

Upon opening the package, verify that all components are present and undamaged.

• 1 x Stihl 4226 358 0705 Fuel Line

Figure 2: Stihl 4226 358 0705 Fuel Line as supplied in its original packaging.

4. Installation Guide (Setup)

This section outlines the general steps for replacing the fuel line. Specific hedgetrimmer models may have slight variations.

Tools Required:

• Pliers (needle-nose recommended)
• Screwdriver (appropriate for your hedgetrimmer's casing)
• Clean rags
• Fuel-resistant sealant (optional, for some connections)

Installation Steps:

1. Prepare the Hedgetrimmer: Ensure the engine is off and cool. Disconnect the spark plug wire. Drain any remaining fuel from the tank into an approved container.
2. Access the Fuel System: Carefully remove the engine cover or housing components as necessary to gain access to the fuel tank and existing fuel lines. Refer to your hedgetrimmer's specific service manual for detailed disassembly instructions.
3. Remove Old Fuel Line: Locate the old fuel line. Note its routing and connections to the carburetor and fuel tank. Use pliers to gently disconnect the old fuel line from its fittings. Be prepared for residual fuel to leak out.
4. Clean Connections: Inspect and clean the connection points on the carburetor and fuel tank to ensure no debris will interfere with the new fuel line.
5. Install New Fuel Line: Carefully insert the new Stihl 4226 358 0705 Fuel Line into the fuel tank opening. Ensure the filter end is properly seated at the bottom of the tank. Connect the other end of the fuel line to the carburetor fitting, ensuring a snug and secure connection.
6. Secure Routing: Route the new fuel line exactly as the old one was, ensuring it is not kinked, pinched, or rubbing against any moving parts or hot engine components.
7. Reassemble: Reattach any removed covers or housing components. Ensure all screws and fasteners are tightened securely.
8. Refuel and Test: Refill the fuel tank with the appropriate fuel mixture. Reconnect the spark plug wire. Prime the carburetor if necessary and start the hedgetrimmer to check for leaks and proper operation.

5. Operation Considerations

Once installed, the fuel line functions as a critical component in delivering fuel from the tank to the carburetor. Proper installation ensures uninterrupted fuel flow, which is essential for the hedgetrimmer's engine to run smoothly.

• After installation, always check for any fuel leaks before and during operation.
• Ensure the fuel line is not kinked or pinched by any part of the hedgetrimmer's housing, as this can restrict fuel flow.
• The fuel filter attached to the end of the fuel line inside the tank should remain submerged in fuel during operation to prevent air from entering the fuel system.

6. Maintenance and Care

Regular inspection and timely replacement of the fuel line are crucial for maintaining your hedgetrimmer's performance and preventing fuel system issues.

• Visual Inspection: Periodically inspect the fuel line for signs of wear, such as cracks, hardening, brittleness, swelling, or leaks. Pay close attention to areas where the line connects to fittings or passes through housing.
• Replacement Interval: Fuel lines can degrade over time due to exposure to fuel, heat, and UV light. It is recommended to replace the fuel line every 1-2 years, or immediately if any signs of damage are observed, even if no visible leaks are present.
• Fuel Quality: Using fresh, high-quality fuel and the correct oil mixture (for 2-stroke engines) can help prolong the life of fuel system components.

7. Troubleshooting Common Issues

If you experience problems with your hedgetrimmer after fuel line installation, consider the following:

• Engine Not Starting or Running Poorly:
  • Check for kinks or pinches in the fuel line that could restrict fuel flow.
  • Ensure all connections are secure and not leaking air, which can cause a lean fuel mixture.
  • Verify the fuel filter at the end of the line inside the tank is clean and not clogged.
• Fuel Leaks:
  • Inspect all connection points for proper seating and tightness.
  • Check the entire length of the fuel line for any cuts, cracks, or abrasions.
  • Ensure the fuel tank cap is properly sealed.

If issues persist, consult a qualified Stihl service technician.

8. Product Specifications

9. Warranty and Support

This Stihl OEM part is manufactured to high standards. For specific warranty information, please refer to the documentation provided with your original Stihl hedgetrimmer or contact an authorized Stihl dealer. Keep your purchase receipt as proof of purchase.

For technical assistance or further support, please contact your local authorized Stihl service center or the retailer from whom you purchased the part.

• Stihl Official Website: www.stihlusa.com
• Authorized Dealer Locator: Use the dealer locator tool on the official Stihl website to find a service center near you.