Stihl FS 55 Instruction Manual

Pages 104

Year 2011

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of 104

Stihl FS 55 Specification

The Stihl FS 55 is a versatile and powerful grass trimmer designed for both residential and light commercial use. At its core, the FS 55 is equipped with a robust 27.2 cc 2-stroke engine, delivering ample power to tackle a variety of trimming tasks. This engine is known for its reliability and efficiency, ensuring consistent performance over prolonged periods of use. The trimmer features a fuel capacity of 0.33 liters, offering a reasonable runtime before needing refuel, which is suitable for small to medium-sized yards.

The FS 55 is designed with user comfort in mind, incorporating an ergonomic loop handle that provides excellent maneuverability and control. This feature is especially beneficial when navigating around obstacles or working in tight spaces. The lightweight construction of the trimmer, weighing approximately 4.9 kg, reduces user fatigue, allowing for extended operation without discomfort.

Stihl has equipped the FS 55 with a TapAction™ Autocut® C 25-2 cutting head, which facilitates easy line advancement with a simple tap on the ground. This mechanism ensures that the trimmer line is always at an optimal length, enhancing cutting efficiency. Additionally, the FS 55 supports a variety of attachments and cutting tools, increasing its versatility for different landscaping needs.

The trimmer's design includes a multi-function control handle, enabling easy and convenient access to all controls, thereby enhancing operational safety and ease of use. The FS 55 also features a simplified starting procedure with its semi-automatic choke lever, reducing the effort required to start the engine. Overall, the Stihl FS 55 is a well-balanced trimmer that combines power, efficiency, and user-friendly features, making it a popular choice for homeowners and professionals alike.

Stihl FS 55 F.A.Q.

How do I start the Stihl FS 55 trimmer?

To start the Stihl FS 55, set the trimmer on a flat surface. Move the stop switch to the "I" position, press the fuel pump bulb several times until fuel is visible, move the choke lever to the cold start position, pull the starter rope until the engine runs briefly, then move the choke to the run position and pull again until the engine starts.

What type of fuel should I use for the Stihl FS 55?

Use unleaded gasoline with a minimum octane rating of 89 and mix it with high-quality 2-cycle engine oil at a ratio of 50:1. Stihl recommends their own brand of engine oil for optimal performance.

How often should I clean the air filter on my FS 55 trimmer?

The air filter should be checked and cleaned after every 25 hours of operation or more frequently if you are working in dusty conditions. Rinse the filter in warm, soapy water and allow it to dry completely before reinstalling.

What is the correct way to replace the trimmer line on the Stihl FS 55?

To replace the trimmer line, ensure the engine is off and cool. Remove the spool from the trimmer head, cut two lengths of line about 13 feet each, and wind the line onto the spool in the direction indicated. Secure the line ends in the notches and reassemble the spool onto the head.

How can I troubleshoot if my FS 55 won't start?

If the FS 55 won't start, check if there is fresh fuel in the tank and that it is mixed correctly. Ensure the spark plug is clean and in good condition. Inspect the air filter for clogs and clean it if necessary. Also, confirm that the choke is set correctly according to the starting instructions.

What maintenance should be performed regularly on the FS 55 trimmer?

Regular maintenance includes checking and cleaning the air filter, inspecting and replacing the spark plug annually, lubricating the gear head, and checking the fuel system for leaks or damage. Follow the maintenance schedule in the user manual for detailed guidance.

How do I adjust the carburetor on my FS 55 trimmer?

Adjusting the carburetor should be done cautiously and only if necessary. Locate the adjustment screws marked 'L', 'H', and 'LA'. Adjusting 'L' affects low-speed performance, 'H' affects high-speed performance, and 'LA' adjusts idle speed. It's recommended to refer to the user manual or consult a professional for precise adjustments.

Why does the FS 55 engine stall after starting?

If the engine stalls after starting, it could be due to an incorrect choke setting, clogged air filter, or fuel line issues. Ensure the choke is set to the run position after starting, clean the air filter, and check for any obstructions in the fuel line.

How can I prevent the trimmer line from breaking frequently?

To prevent the trimmer line from breaking, avoid contact with hard surfaces, use the correct line diameter specified for the FS 55, and ensure the line is wound correctly on the spool. Regularly check for signs of wear and replace the line as needed.

What safety precautions should I take while using the Stihl FS 55?

Always wear appropriate personal protective equipment, including eye and ear protection, gloves, and sturdy footwear. Ensure the work area is clear of bystanders and obstacles. Follow the manufacturer's guidelines for operation and maintenance to ensure safe use.