Stihl FS 55 RC Manual: A Comprehensive Guide
Welcome to your ultimate resource for mastering the Stihl FS 55 RC trimmer! This guide provides everything, from safety to maintenance.
The Stihl FS 55 RC trimmer is a versatile tool designed for homeowners and light-duty professional use. Known for its reliability and ease of use, the FS 55 RC is perfect for trimming grass, weeds, and light brush around gardens, landscapes, and along fences. This comprehensive guide will provide you with all the necessary information to operate and maintain your FS 55 RC trimmer effectively.
This guide covers assembly, safety precautions, fuel mixing, starting and stopping procedures, operating techniques, maintenance tips, and troubleshooting common issues. By following this manual, you’ll ensure optimal performance and longevity of your equipment. The FS 55 RC is part of the FS 55 family, including FS 55, FS 55 C, and FS 55 R models.
Safety Precautions and Warnings
Prioritize safety when operating the Stihl FS 55 RC trimmer. Always read and understand the instruction manual before use. Improper use can lead to severe or fatal injuries. Wear appropriate personal protective equipment (PPE), including eye protection, hearing protection, gloves, and sturdy footwear. Avoid loose clothing or jewelry that could get caught in moving parts.
Operate the trimmer in a well-ventilated area to avoid inhaling exhaust fumes. Never use the trimmer indoors or in enclosed spaces. Keep bystanders and pets at least 50 feet away from the work area. Inspect the trimmer before each use for any damage or loose parts. Ensure the cutting attachment is properly installed and secured; Never modify the trimmer or use attachments not approved by Stihl.
Understanding the Instruction Manual
The Stihl FS 55 RC instruction manual is your primary resource for safe and effective operation. This manual contains essential information regarding the trimmer’s features, functions, safety guidelines, and maintenance procedures. Familiarize yourself with the manual before attempting to assemble, operate, or service the trimmer.
Pay close attention to the warnings and cautions highlighted throughout the manual. These alerts indicate potential hazards and provide instructions for avoiding them. The manual also includes detailed diagrams and illustrations that demonstrate proper techniques and procedures. Refer to these visuals to ensure you are performing tasks correctly. The manual also explains the meaning of the pictograms.
Keep the instruction manual in a safe and accessible location for future reference. If you lose the manual, you can download a digital copy from the Stihl website or request a replacement from an authorized Stihl dealer.
Pictograms and Symbols
The Stihl FS 55 RC instruction manual uses pictograms and symbols to convey important information quickly and effectively. These visual cues help users understand instructions, warnings, and safety precautions at a glance. Understanding these pictograms and symbols is crucial for the safe and proper operation of the trimmer.
Pictograms are small illustrations that represent specific actions, components, or hazards. For example, a pictogram might show the correct way to wear safety glasses or indicate the location of the fuel tank. Symbols, on the other hand, are standardized markings that denote specific types of information, such as warnings, prohibitions, or mandatory actions.
Refer to the manual’s legend or glossary to identify the meaning of each pictogram and symbol. Pay close attention to symbols that indicate potential hazards or require immediate action. By understanding and heeding these visual cues, you can minimize the risk of accidents and ensure the safe operation of your Stihl FS 55 RC trimmer. Ignoring them can lead to injury.
Assembling the Stihl FS 55 RC
Proper assembly of your Stihl FS 55 RC trimmer is essential for safe and efficient operation. Before you begin, ensure you have all the necessary components and tools. Refer to the parts list in the instruction manual to verify that everything is present. The assembly process typically involves attaching the loop handle, fitting the carrying ring, and mounting the cutting attachment.
Carefully follow the step-by-step instructions provided in the manual, paying close attention to the illustrations. Ensure that all screws and bolts are tightened securely, but avoid over-tightening, which could damage the components. If you encounter any difficulties, consult the troubleshooting section of the manual or seek assistance from a qualified technician.
Double-check all connections before starting the engine. A loose or improperly installed component could lead to equipment failure or personal injury. Take your time and proceed methodically, and don’t hesitate to consult the manual for clarification. Correct assembly guarantees better performance.
Mounting the Loop Handle
The loop handle provides essential control and maneuverability for the Stihl FS 55 RC trimmer. Begin by positioning the loop handle on the drive tube at a comfortable distance from the control handle, ensuring it suits your reach and working style. Next, align the handle with the designated mounting points on the tube.
Insert the provided screws or bolts through the holes in the handle and into the corresponding threads on the clamp. Tighten the fasteners gradually, alternating between them to ensure even pressure distribution. Avoid over-tightening, as this could strip the threads or damage the handle.
Once the handle is securely mounted, check its stability by applying moderate force. It should remain firmly in place without any wobbling or slippage. Ensure the throttle cable isn’t kinked, and that the throttle trigger moves freely! If necessary, adjust the handle position slightly to achieve optimal comfort and control. Remember to consult the manual.
Fitting the Carrying Ring
The carrying ring plays a crucial role in balancing the Stihl FS 55 RC during operation, reducing strain and improving handling. To correctly fit the carrying ring, first identify the appropriate location on the drive tube, generally a comfortable distance from the engine housing.
Align the carrying ring with the chosen spot, ensuring that the attachment point faces upwards, ready to connect to the shoulder strap. Insert the provided screw, typically an M6x14 screw, through the ring and into the corresponding hole on the drive tube.
Tighten the screw firmly to secure the ring in place, but avoid excessive force that could damage the tube. Once attached, test the ring’s stability by gently pulling on it. It should remain securely fastened without any movement. Remember to mount the deflectors. Finally, adjust the position of the carrying ring until the machine balances.
Mounting the Cutting Attachment
Mounting the cutting attachment on your Stihl FS 55 RC requires careful attention to ensure safety and optimal performance. Begin by selecting the appropriate cutting attachment for your task, whether it’s a mowing head or a metal blade. Ensure the machine is off and the spark plug is disconnected for safety.
If your machine came with mounting hardware, proceed to attach the cutting attachment directly to the shaft. If it didn’t, only mowing heads may be used which mount directly to the shaft. Block the shaft to prevent rotation during installation. Remove any existing hardware or debris from the shaft.
Carefully align the cutting attachment with the shaft, ensuring that it seats properly against the thrust washer. Secure the attachment using the appropriate nut or bolt, tightening it firmly with a wrench. Always ensure the convex side faces up. Finally, double-check the tightness of the attachment before starting the engine, and use the matching deflector.
Fuel and Lubrication
Proper fuel and lubrication are crucial for the longevity and performance of your Stihl FS 55 RC trimmer. Using the correct fuel mixture ensures optimal engine operation and prevents damage. Always use high-quality brand-name gasoline with a minimum octane rating of 90, whether leaded or unleaded. Avoid using fuel that has been stored for extended periods, as it can degrade and cause engine problems.
The recommended fuel mixture for the Stihl FS 55 RC is a 50:1 ratio of gasoline to two-stroke engine oil. Use Stihl’s high-quality two-stroke engine oil for best results, as it is specifically formulated to protect your engine. Mixing fuel should be done in a clean, approved container, adding the oil to the gasoline and shaking thoroughly to ensure a uniform mixture.
Regularly inspect the fuel tank and canister, cleaning them to prevent contamination. Proper fuel management not only enhances engine performance but also extends the life of your trimmer. Avoid working in closed or poorly ventilated rooms.
Fuel Recommendations
To ensure the optimal performance and longevity of your Stihl FS 55 RC trimmer, adhering to specific fuel recommendations is essential. Stihl advises using high-quality, brand-name gasoline with a minimum octane rating of 90. This can be either leaded or unleaded fuel, as long as it meets the octane requirement. Avoid using gasoline with a lower octane rating, as this can lead to engine knocking and potential damage.
It is equally important to use the correct type of two-stroke engine oil. Stihl recommends using their own brand of high-quality two-stroke oil, which is specifically formulated to provide the necessary lubrication and protection for your trimmer’s engine. Using other types of oil may not provide adequate protection and could result in premature engine wear or failure.
Always mix the fuel and oil in the correct ratio, which is typically 50:1 (gasoline to oil). Proper fuel recommendations are crucial for maintaining your Stihl FS 55 RC.
Mixing Fuel
Properly mixing fuel for your Stihl FS 55 RC trimmer is crucial for its performance and longevity. Always use a clean fuel can to avoid contamination. Start by adding the correct amount of high-quality, two-stroke engine oil to the can. Stihl recommends a 50:1 ratio, meaning 50 parts gasoline to 1 part oil. For example, if you’re mixing 1 gallon of gasoline, you’ll need 2.6 ounces of oil.
Next, add the gasoline to the fuel can. Use gasoline with a minimum octane rating of 90, whether leaded or unleaded. After adding the gasoline, securely close the fuel can and shake it vigorously for at least one minute to ensure the oil and gasoline are thoroughly mixed.
It’s best to mix only the amount of fuel you’ll need for a short period, as fuel mixtures can degrade over time. Never use fuel that has been mixed for more than 30 days. Always store fuel in a cool, dark place away from direct sunlight and heat. Properly mixed fuel is essential for your Stihl FS 55 RC.
Starting and Stopping the Engine
Starting your Stihl FS 55 RC trimmer requires a few simple steps. First, ensure the trimmer is on a flat surface and the cutting attachment is clear of any obstructions. Move the slide control to the “START” position. If the engine is cold, engage the choke. For warm starts, the choke may not be necessary.
Firmly grip the trimmer and pull the starter rope handle sharply and smoothly. Avoid pulling the rope to its full extension, as this can damage the starter mechanism. Repeat until the engine sputters or starts briefly. Once the engine starts, disengage the choke. Allow the engine to warm up for a few moments before using it.
To stop the engine, move the slide control to the “STOP” or “0” position. The engine should shut off immediately. Always ensure the cutting attachment has completely stopped before setting the trimmer down. If the engine does not stop, consult the troubleshooting section of the manual. Following these steps will ensure safe and efficient operation.
Operating Instructions
Before operating the Stihl FS 55 RC, ensure you’re wearing appropriate safety gear, including eye protection, hearing protection, and sturdy footwear. Clear the area of any obstacles or debris that could be thrown by the cutting attachment. Familiarize yourself with the trimmer’s controls and safety features.
Start the engine following the instructions in the “Starting and Stopping the Engine” section. Once the engine is running smoothly, hold the trimmer firmly with both hands; Maintain a balanced stance and keep the cutting attachment clear of your feet and other objects. Use a sweeping motion to cut grass or weeds, keeping the cutting head at a consistent height.
Avoid forcing the trimmer through dense vegetation, as this can strain the engine and reduce cutting efficiency. If the cutting attachment becomes clogged, stop the engine and carefully remove the obstruction. Regularly inspect the cutting attachment for damage or wear and replace it as needed. Always operate the trimmer in a well-ventilated area to avoid inhaling exhaust fumes. Take breaks as needed to prevent fatigue.
Balancing the Machine
Properly balancing your Stihl FS 55 RC is crucial for comfortable operation and reducing fatigue during extended use. Start by attaching the shoulder strap, adjusting its length so the trimmer hangs comfortably at your side. The carabiner should sit approximately a hand’s width below your right hip. With the strap in place, hold the trimmer in your normal operating position.
Next, adjust the position of the carrying ring along the drive tube. Loosen the screw securing the ring and slide it up or down until the trimmer feels balanced. The goal is to achieve a neutral position where the cutting attachment hovers parallel to the ground without requiring excessive effort to hold it in place. Once you find the optimal position, tighten the screw moderately to secure the carrying ring.
Test the balance by letting go of the trimmer briefly and observing its “floating” position. If the cutting head tilts up or down, readjust the carrying ring until it remains level. Fine-tuning the balance ensures even weight distribution, minimizing strain on your arms and back, allowing for more precise and controlled cutting;
Adjusting the Carburetor
Fine-tuning the carburetor on your Stihl FS 55 RC is essential for optimal engine performance and fuel efficiency. Carburetor adjustments primarily involve the low-speed screw (L) and, in some models, a high-speed screw (H), although the FS 55 RC typically has a fixed high-speed setting. Before making any adjustments, ensure the air filter is clean and the spark plug is in good condition.
To adjust the low-speed screw, start by locating it on the carburetor. With the engine running, slowly turn the screw clockwise until the engine begins to run roughly or stalls. Then, gradually turn the screw counterclockwise until the engine runs smoothly and accelerates without hesitation. The goal is to find the “sweet spot” where the engine idles steadily and responds quickly to throttle input.
If the cutting attachment rotates at idle, slightly turn the low-speed screw clockwise until it stops. Remember, precise adjustments are crucial; small changes can significantly impact performance. If you are unsure about adjusting the carburetor, consult a qualified technician to avoid potential engine damage.
Maintenance and Care
Regular maintenance is vital to prolonging the life and ensuring the efficient operation of your Stihl FS 55 RC trimmer. Consistent care prevents costly repairs and keeps your machine performing at its best. Key aspects of maintenance include spark plug maintenance, air filter cleaning, and general inspections.
Begin by regularly inspecting the spark plug. Clean or replace it if it shows signs of wear or fouling. A clean spark plug ensures proper ignition and optimal engine performance. Next, routinely clean the air filter to maintain adequate airflow to the engine. A clogged air filter can reduce power and increase fuel consumption.
Additionally, inspect the cutting attachment for damage and replace it as needed. Keep the cutting blades sharp to ensure clean and efficient cuts. Periodically check all accessible screws and nuts, retightening them as necessary to prevent loosening due to vibration. Store the trimmer in a dry, secure location, away from children and unauthorized users, to protect it from damage and ensure safety.
Spark Plug Maintenance
Maintaining the spark plug in your Stihl FS 55 RC is crucial for ensuring optimal engine performance and reliable starting. A properly functioning spark plug provides the necessary spark to ignite the fuel-air mixture, allowing the engine to run smoothly. Regular inspection and maintenance can prevent starting issues and engine misfires.
To inspect the spark plug, first, ensure the engine is cool and the trimmer is turned off. Remove the spark plug boot carefully. Use a spark plug wrench to unscrew and remove the spark plug. Examine the spark plug for signs of wear, fouling, or damage. A healthy spark plug should have clean electrodes and a light tan color.
If the spark plug is dirty, clean it with a wire brush. If the electrodes are heavily worn or the porcelain insulator is cracked, replace the spark plug with a new one that meets the Stihl specifications. When reinstalling the spark plug, tighten it securely, but avoid overtightening, which could damage the engine. Finally, reattach the spark plug boot, ensuring a snug fit to prevent moisture and dirt from entering. Regular spark plug maintenance ensures reliable engine performance.
Air Filter Cleaning
Maintaining a clean air filter in your Stihl FS 55 RC trimmer is essential for optimal engine performance and longevity. The air filter prevents dirt and debris from entering the engine, ensuring a clean air supply for combustion. A clogged or dirty air filter restricts airflow, leading to reduced power, poor fuel efficiency, and potential engine damage. Regular cleaning and maintenance of the air filter can prevent these issues and keep your trimmer running smoothly.
To clean the air filter, first, ensure the engine is turned off and cool. Locate the air filter housing, typically on top of the engine. Open the housing and remove the air filter. Inspect the filter for dirt and debris. If the filter is lightly soiled, gently tap it to remove loose particles. For more stubborn dirt, wash the filter with warm, soapy water. Rinse thoroughly and allow the filter to air dry completely before reinstalling it.
If the air filter is damaged or excessively dirty, replace it with a new one that meets the Stihl specifications. Ensure the air filter is properly seated in the housing before closing it. Regular air filter cleaning ensures optimal engine performance and extends the life of your Stihl FS 55 RC trimmer.
Troubleshooting Common Issues
Even with proper maintenance, the Stihl FS 55 RC trimmer may encounter occasional issues. This section provides guidance on troubleshooting common problems to help you quickly resolve them and get back to work. One frequent issue is difficulty starting the engine. This could be due to several factors, including an empty fuel tank, stale fuel, a fouled spark plug, or a clogged air filter. Ensure the fuel tank is filled with fresh fuel mixed at the correct ratio. Check the spark plug for fouling and clean or replace it if necessary. Inspect the air filter and clean or replace it if clogged.
Another common problem is the engine running poorly or stalling. This can be caused by a dirty carburetor, improper carburetor adjustment, or a clogged fuel filter. Try adjusting the carburetor according to the manual’s instructions. If the problem persists, the carburetor may need professional cleaning or rebuilding. Also, check the fuel filter and replace it if it’s clogged.
If the cutting attachment isn’t rotating, check the drive shaft and clutch for damage. Ensure the cutting attachment is properly installed and secured. By systematically addressing these potential issues, you can effectively troubleshoot and resolve common problems with your Stihl FS 55 RC trimmer.
Approved Cutting Attachments
Using the correct cutting attachment is crucial for the safe and efficient operation of your Stihl FS 55 RC trimmer. Stihl approves specific cutting heads and blades for use with this model, ensuring optimal performance and minimizing the risk of accidents. Using unapproved attachments can lead to equipment damage, personal injury, and voiding the warranty.
Approved cutting attachments for the FS 55 RC include various mowing heads and metal cutting blades. Mowing heads like the Stihl AutoCut C 25-2 are designed for trimming grass and weeds in open areas and along edges. Metal cutting blades are suitable for tougher vegetation, such as thick brush and small saplings. Always refer to the instruction manual for a complete list of approved cutting attachments and their specific applications. It’s very important to choose the right tool for the job.
Never modify or adapt non-approved cutting attachments for use with the FS 55 RC. Such modifications can compromise the trimmer’s safety features and lead to dangerous situations. Always purchase genuine Stihl cutting attachments from an authorized dealer to ensure compatibility and quality. Remember, safety and performance depend on using the correct, approved cutting attachments.