Ryobi PLT-2543 - User Manual

This document provides the owner's operation manual for the RYOBI PLT-2543 Trimmer, a tool designed for cutting grass and light vegetation. The manual covers safety instructions, assembly, operation, maintenance, and troubleshooting, ensuring users can operate the device safely and effectively.

Function Description

The RYOBI PLT-2543 is a gasoline-powered trimmer (also referred to as a brushcutter in some sections) designed for cutting grass and light vegetation. It operates using a monofilament string head that rotates at high speed to trim unwanted growth. The device is intended for outdoor use and requires pre-mixed petrol and 2-cycle oil for its engine. Its primary function is to maintain lawns and clear overgrown areas, offering a robust and trouble-free performance when properly cared for. The trimmer is equipped with a grass deflector to protect the user from debris and features an EZ Line™ Tap Advance System for convenient string advancement during operation.

Important Technical Specifications

Weight:
- Without fuel and string head: 4.63 Kg
- Without fuel, w/string head: 4.44 Kg
Fuel Tank Volume: 425 cm³
Cutting Swath: 432 mm
Engine Displacement: 25 cm³
Maximum Engine Performance (in accordance with ISO 8893): 0.75 kW
Maximum Rotational Frequency of the Spindle: 9,000 min⁻¹
Engine Speed (rotational frequency) at recommended max. spindle rotational frequency: 12,500 min⁻¹
Engine Speed (rotational frequency) at idle: 3,100 - 4,300 min⁻¹
Fuel Consumption (in accordance with ISO 8893):
- At max. engine performance: 0.48 kg/h
- At max. engine performance: 0.46 kg/h
Vibration Level Idling:
- Front handle: 4.8 m/s²
- Rear handle: 4.8 m/s²
Vibration Level Racing:
- Front handle: 13.0
- Rear handle: 8.4
Sound Pressure Level (in accordance with EN ISO 11806:1997, ISO 7917:1987): 100
Sound Power Level (in accordance with ISO 10884): 113
String Diameter: 2.0 mm (.080 in.) monofilament string.
Spark Plug: Champion RCJ-6Y with 0.63 mm (.025 in.) electrode gap.

Usage Features

The RYOBI PLT-2543 Trimmer is designed for user-friendly operation with several features enhancing its usability:

Ergonomic Design: The trimmer is held with the right hand on the rear handle and the left hand on the front handle, promoting a firm grip and comfortable operating position, ideally with the rear handle at hip height.
EZ Line™ Tap Advance System: This system allows for convenient string advancement by tapping the string head on the ground while the engine is running at full throttle. This eliminates the need to manually adjust the string during operation, improving efficiency.
Manual String Advancement: If the string is too short to advance by tapping, users can manually advance the string by pushing down the spool retainer and pulling on the string(s).
Optimal Cutting Technique: The manual advises tilting the trimmer toward the area being cut to utilize the "best cutting area" and using only the tip of the string, avoiding forcing the string head into uncut grass.
Cold and Warm Engine Starting Procedures: Detailed instructions are provided for starting the engine in both cold and warm conditions, including the use of the primer bulb, choke lever, throttle interlock, and starter grip.
Safety Switch: The unit is equipped with a positive on-off switch (Ignition Switch) that must be in the "I" (run) position to start and "O" to stop.
Fuel Mixing: The trimmer requires a pre-mix of unleaded petrol and 2-cycle engine oil at a 50:1 ratio (2% oil). Specific instructions are given on the type of oil to use and how to mix and store fuel safely.
Grass Deflector Line Trimming Cut-Off Blade: A blade on the grass deflector automatically trims the string to the optimal length for best cutting performance.
Adjustable Front Handle: The front handle can be installed and moved to a comfortable position for the user, with a spacer limiting its upper position.

Maintenance Features

Regular maintenance is crucial for the longevity and performance of the RYOBI PLT-2543 Trimmer. The manual outlines several key maintenance tasks:

String Replacement: Detailed instructions are provided for replacing the string, including how to install a new pre-wound spool or manually wind new string onto the spool. This involves removing the spool retainer, the old spool, and winding two pieces of string (each approximately 2.7 m long) onto the upper and bottom parts of the spool.
Cleaning the Exhaust Port and Muffler: Users are advised that carbon deposits can block the exhaust port and muffler, leading to power loss. While removal of these deposits typically requires a qualified service technician, the manual highlights the importance of this maintenance.
Spark Arrester Maintenance: The spark arrester needs to be cleaned or replaced every 25 hours or yearly. Instructions include removing the spark arrester, cleaning it with a quality carbon cleaner and wire brush if it's metal, or replacing it if it's fiberglass.
Air Filter Replacement and Cleaning: The air filter (43) should be kept clean for proper performance and long life. Instructions include removing the air filter cover, cleaning the filter in warm soapy water, rinsing, and drying it completely. Annual replacement is recommended.
Fuel Cap Inspection: The fuel cap contains a non-serviceable filter and check valve. A clogged filter or faulty check valve can cause poor engine performance, and the cap should be replaced if leaking or if performance improves when loosened.
Spark Plug Replacement: The spark plug (Champion RCJ-6Y) should be replaced annually, ensuring the correct electrode gap of 0.63 mm (.025 in.).
Carburetor Adjustments: The manual mentions that carburetor adjustments may be necessary for optimal engine performance, particularly for idle speed and mixture. It notes that the carburetor adjustment needle(s) are equipped with plastic cap(s) that prevent counterclockwise rotation from the original factory setting, and any adjustments beyond this require an authorized service dealer. However, it does provide guidance for minor adjustments like turning the mixture needle or idle speed screw.
General Inspection: Before each use, users should inspect the unit for loose fasteners, fuel leaks, and damaged parts, replacing any damaged components before operation. All guards, straps, deflectors, and handles must be properly and securely attached.
Storage: For storage longer than one month, the manual advises draining all fuel from the tank, running the engine until it stops, cleaning the trimmer, and storing it in a well-ventilated place inaccessible to children and away from corrosive agents. The blade should be covered with a protector.