INTRODUCTION
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
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© 2002 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
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 understood this manual before starting or operating this equipment.
THIS PRODUCT IS COVERED BY ONE OR MORE US PATENTS, OTHER PATENTS PENDING.
TABLE OF CONTENTS
I. California Proposition 65 Warning . . . . . . . . . . . . . . . . 3
II. Rules for Safe Operation . . . . . . . . . . . . . . . . . . . . .
III. Assembly Instructions . . . . . . . . . . . . . . . . . . . . . . | |
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 . . . . . . . . . . . . . . . . . . . .
VII. Maintenance and Repair Instructions . . . . . . . . . | |
A. Maintenance Schedule . . . . . . . . . . . . . . . . . . | . . 16 |
B. Line Installation . . . . . . . . . . . . . . . . . . . . . . . . | . . 16 |
C. Installing a Prewound Reel . . . . . . . . . . . . . . . | . . 18 |
D. Air Filter Maintenance . . . . . . . . . . . . . . . . . . . | . . 18 |
E. Spark Arrestor Maintenance . . . . . . . . . . . . . . | . . .19 |
F. Carburetor Adjustment . . . . . . . . . . . . . . . . . . | . . 20 |
G. Replacing the Spark Plug . . . . . . . . . . . . . . . . | . . 20 |
H. Long Term Storage . . . . . . . . . . . . . . . . . . . . . | . . . 21 |
I. Cleaning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . | . . 21 |
J. Storage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . | . . 21 |
K. Accessories/Replacement Parts . . . . . . . . . . . | . . .21 |
VIII. Troubleshooting Chart . . . . . . . . . . . . . . . . . . . . . . . 22
IX. Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
X. Warranty . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
XI. Parts List . . . . . . . . . . . . . . . . . . . . . .Inside Back Cover
CONTENTS OF CARTON
• Model 790r Trimmer/Brushcutter
∆Large Bump Head Cutting Attachment
∆
∆
•Cutting Attachment Shield with Hardware
•Shoulder Harness
•Locking Rod Tool
•Operator's Manual
•Product Registration Card
•Bottle of
∆This item will either be installed on the unit or in the hardware pack
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