Operator's Manual for Ryobi 2-Cycle String Trimmer

Quick guide from the manual

This manual provides essential instructions for the safe and efficient operation of your Ryobi 2-Cycle String Trimmer. Key points include:

• Fuel Mixing: Use a 50:1 gasoline-to-oil ratio. Always use fresh, clean unleaded gasoline and 2-cycle oil.
• Starting Procedure: Prime the bulb 10 times, set the choke to Position 1, squeeze the throttle, and pull the starter rope 5 times. Move the choke to Position 2 and pull 5-10 times to start.
• Safety: Always wear eye, hearing, hand, and foot protection. Keep bystanders at least 50 feet (15 m) away.

Know Your Unit

Familiarize yourself with the main components of your trimmer, including the cutting head, shaft housing, handle, throttle control, choke lever, and primer bulb. Refer to the diagram on page 11 for specific part identification.

Assembly

Follow these steps to prepare your unit for use:

• Cutting Head Shield: Install the shield using the provided wing nut, washer, and bolt. Ensure it is firmly in place before operation.
• Shaft Connection: Connect the upper and lower shaft housings by aligning the holes and securing them with the provided screws using a #2 Phillips screwdriver.
• Handle Adjustment: Attach the handle to the upper shaft and adjust it to a comfortable operating position, ensuring it is positioned beyond the safety label.

Oil and Fuel

Proper fuel mixture is critical for engine performance. Use a 50:1 ratio (1 gallon of unleaded gasoline to 2.6 fl. oz. of 2-cycle oil). Do not use E85 fuel, as it will damage the engine and void the warranty.

Operation

Hold the unit with both hands at waist level, keeping the cutting head a few inches above the ground. For units with bump heads, tap the bump knob on the ground while operating at high speed to release more trimming line.

Maintenance

Regular maintenance ensures longevity and performance:

• Air Filter: Clean and re-oil every 10 hours of use.
• Spark Plug: Check condition and gap (0.025 in. / 0.635 mm) every 25 hours.
• Idle Speed: If the engine does not idle properly, adjust the idle speed screw clockwise in 1/8 turn increments.

Troubleshooting

If the engine fails to start, check if the fuel tank is empty, press the primer bulb 10 times, or check for a fouled spark plug. If the cutting head fails to advance line, clean the head or refill with new line.