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THANK YOU
Thank you for buying this quality product. This modern
outdoor power tool will provide many hours of useful
service. You will find it to be a great labor-saving device.
This operator’s manual provides you with easy-to-
understand operating instructions. Read the whole
manual and follow all the instructions to keep your new
outdoor power tool in top operating condition.
PRODUCT REFERENCES, ILLUSTRATIONS
AND SPECIFICATIONS
All information, illustrations and specifications in this
manual are based on the latest product information
available at the time of printing. We reserve the right to
make changes at any time without notice.
Copyright
©
2003 MTD SOUTHWEST INC
All Rights Reserved.
Bump Head™ is a trademark of MTD SOUTHWEST INC.
SplitLine™ is a trademark of MTD SOUTHWEST INC.
SERVICE INFORMATION
Service on this unit both within and after the warranty
period should be performed only by an authorized and
approved service dealer.
• Call 1-800-345-8746 in the United States, or
1-800-668-1238 in Canada, to obtain a list of
authorized service dealers near you
Or
• Go to www.RyobiOutdoor.com on the World Wide
Web for a list of authorized service dealers
DO NOT RETURN THE UNIT TO THE RETAILER.
NOTE: PROOF OF PURCHASE WILL BE REQUIRED
FOR WARRANTY SERVICE.
Make sure you carefully read and understand this
manual before starting or operating this equipment.
THIS PRODUCT IS COVERED BY ONE OR MORE
US PATENTS, OTHER PATENTS PENDING.
2
INTRODUCTION TABLE OF CONTENTS
I. California Proposition 65 Warning . . . . . . . . . . . . . . . . 3
II. Rules for Safe Operation . . . . . . . . . . . . . . . . . . . . . 3-7
A. Important Safety Information . . . . . . . . . . . . . . . . . 4
B. Safety and International Symbols . . . . . . . . . . . . . 6
C. Know Your Unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
III. Assembly Instructions . . . . . . . . . . . . . . . . . . . . . . 8-10
A. Install and Adjust the J handle . . . . . . . . . . . . . . . 8
B. Install the Harness . . . . . . . . . . . . . . . . . . . . . . . . . 8
C. Remove and Install the Attachment Shield . . . . . . .8
D. Remove the Cutting Attachment and
Install the Cutting Blade . . . . . . . . . . . . . . . . . . . . .9
E. Remove the Cutting Blade and
Install the Cutting Attachment . . . . . . . . . . . . . . . .10
IV. Oil and Fuel Information . . . . . . . . . . . . . . . . . . . . . . 11
V. Starting/Stopping Instructions . . . . . . . . . . . . . . . . . 12
VI. Operating Instructions . . . . . . . . . . . . . . . . . . . . 13-14
A. Holding the Trimmer . . . . . . . . . . . . . . . . . . . . . . 13
B. Adjusting Trimming Line Length . . . . . . . . . . . . . 13
C. Tips for Best Trimming Results . . . . . . . . . . . . . . 13
D. Decorative Trimming . . . . . . . . . . . . . . . . . . . . . . 14
E. Using the Cutting Blade . . . . . . . . . . . . . . . . . . . . .14
VII. Maintenance and Repair Instructions . . . . . . . . . 15-20
A. Maintenance Schedule . . . . . . . . . . . . . . . . . . . . 15
B. Line Installation . . . . . . . . . . . . . . . . . . . . . . . . . . 15
C. Installing a Prewound Reel . . . . . . . . . . . . . . . . . 17
D. Air Filter Maintenance . . . . . . . . . . . . . . . . . . . . . 17
E. Spark Arrestor Maintenance . . . . . . . . . . . . . . . . .18
F. Carburetor Adjustment . . . . . . . . . . . . . . . . . . . . 19
G. Replacing the Spark Plug . . . . . . . . . . . . . . . . . . 19
H. Cleaning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
I. Storage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
J. Long Term Storage . . . . . . . . . . . . . . . . . . . . . . . .20
K. Accessories/Replacement Parts . . . . . . . . . . . . . .20
VIII. Troubleshooting Chart . . . . . . . . . . . . . . . . . . . . . . . 21
IX. Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
X. Warranty . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
XI. Parts List . . . . . . . . . . . . . . . . . . . . . .Inside Back Cover
CONTENTS OF CARTON
• Model 780r Trimmer/Brushcutter
∆ Large Bump Head Cutting Attachment
∆ 4-Tooth Brush Blade and Hardware
∆ J-Handle and Hardware
• Cutting Attachment Shield with Hardware
• Shoulder Harness
• Locking Rod Tool
•Operator's Manual
• Product Registration Card
• Bottle of 2-Cycle Oil
∆ This item will either be installed on the unit or in the
hardware pack