Ryobi 990r User Manuals

Table of Contents

• I. California Emission Regulations

  3
• II. Safety Warnings

  3
• A. Safety Warnings for Brush Blade

  4
• B. Safety and International Symbols

  5
• III. Assembly Instructions

  7
• A. Adjusting the J-Handle

  7
• B. Installing the Shoulder Strap

  7
• C. Installing the Brush Blade

  8
• D. Installing the Line Spool

  9
• E. Operating Split Boom Coupler

  10
• IV. Oil and Fuel Information

  11
• V. Starting/Stopping Instructions

  13
• Operating Instructions

  14
• A. Adjusting the Trimming Line Length

  14
• B. Decorative Trimming

  14
• C. Using the Brush Blade

  14
• VII. Maintenance and Repair Instructions

  15
• A. Maintenance Schedule

  15
• B. Line Installation

  16
• C. Gear Housing Service

  18
• D. Air Filter Maintenance

  19
• E. Carburetor Adjustment

  20
• F. Inspecting/Cleaning the Muffler

  21
• G. Replacing the Spark Plug

  23
• H. Checking/Adjusting Valve Clearance

  23
• VIII. Cleaning and Storage

  25
• Specifications

  25
• Troubleshooting Chart

  26
• XII. Warranty

  28