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790r
2-Cycle Gas Trimmer/Brushcutter
OPERATOR’S MANUAL
FOR QUESTIONS, CALL 1-800-345-8746 in U.S. or
1-800-668-1238 in CANADA
www.RyobiOutdoor.com
IMPORTANT MANUAL DO NOT THROW AWAY
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INTRODUCTION TABLE OF CONTENTS I. California Proposition 65 Warning . . . . . . . . . . . . . . . . 3 THANK YOU Thank you for buying this quality product. This modern II. Rules for Safe Operation . . . . . . . . . . . . . . . . . . . . . 3-7 outdoor power tool will provide many hours of useful A. Important Safety Information . . . . . . . . . . . . . . . . . 4 service. You will find it to be a great labor-saving device. B. Safety and International Symbols . . . . . . . . . . . . . 6 This operato
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CALIFORNIA PROPOSITION 65 WARNING WARNING THE ENGINE EXHAUST FROM THIS PRODUCT CONTAINS CHEMICALS KNOWN TO THE STATE OF CALIFORNIA TO CAUSE CANCER, BIRTH DEFECTS OR OTHER REPRODUCTIVE HARM. SPARK ARRESTOR NOTE: For users on U.S. Forest Land and in the states of California, Maine, Oregon and Washington. All U.S. Forest Land and the state of California (Public Resources Codes 4442 and 4443), Oregon and Washington require, by law that certain internal combustion engines operated on forest brush and
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RULES FOR SAFE OPERATION • IMPORTANT SAFETY INFORMATION • • Always stop the engine and allow it to cool before READ ALL INSTRUCTIONS filling the fuel tank. Never remove the fuel tank cap or WARNING: When using the unit, you must add fuel when the engine is hot. Never operate the unit without the fuel cap securely in place. Loosen the fuel follow the safety rules. For your own safety and that of bystanders, please read these tank cap slowly to relieve any pressure in the tank. instructions befor
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RULES FOR SAFE OPERATION • Do not overreach. Always keep proper footing and • Do not attempt to touch or stop the blade when it is balance. rotating. • Always hold the unit with both hands when operating. •A coasting blade can cause injury while it continues to Keep a firm grip on both handles or grips. spin after the engine is stopped or the throttle trigger is released. Maintain proper control until the blade has • Keep hands, face, and feet at a distance from all completely stopped rotating.
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RULES FOR SAFE OPERATION SAFETY AND INTERNATIONAL SYMBOLS This operator's manual describes safety and international symbols and pictographs that may appear on this product. Read the operator's manual for complete safety, assembly, operating and maintenance and repair information. SYMBOL MEANING SYMBOL MEANING • SAFETY ALERT SYMBOL • ON/OFF STOP CONTROL Indicates danger, warning or caution. OFF or STOP May be used in conjunction with other symbols or pictographs. • THROWN OBJECTS AND •WARNING -
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RULES FOR SAFE OPERATION KNOW YOUR UNIT As a brushcutter: APPLICATIONS • Cutting weeds and light bush of up to 1/2 inch in As a trimmer: diameter • Cutting grass and light weeds Other optional accessories may be used with the 790r. • Edging Refer to Operating the EZ-Link System for a list of add-ons. • Decorative trimming around trees, fences, etc. Fuel Cap On/Off Stop Control Throttle Lock-Out Starter Rope Grip Support Fitting Shaft Grip Throttle Control Throttle J-Handle Control EZ-Link™ Bla
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ASSEMBLY INSTRUCTIONS On some units, the J-handle may be pre-installed. In this INSTALL THE HARNESS case you must loosen screws and adjust the handle to fit the operator. Go to step 5 if the J-handle is pre-installed. WARNING: Always use the shoulder harness when using the cutting blade to INSTALL AND ADJUST THE J-HANDLE avoid serious personal injury. 1. Place the J-handle between the top and middle clamp pieces (Fig. 1). 1. Push the strap through the center of the buckle. (4) Screws 2. Pull the
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ASSEMBLY INSTRUCTIONS 2. Hold the locking rod in place by grasping it next to Cutting the boom of the unit (Fig. 9). (3) Screws Attachment Shield 3. While holding the locking rod, remove the cutting attachment by turning it clockwise off of the output shaft (Fig. 10). Store the cutting attachment for future use. Gear Housing NOTE: The blade retainer under the cutting attachment will be used when installing the cutting blade. Shield Mount Fig. 7 Install the cutting attachment shield when using th
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ASSEMBLY INSTRUCTIONS 5. Make sure that the cutting blade is centered on the REMOVE THE CUTTING BLADE AND pilot step and sitting flat against the output shaft INSTALL THE CUTTING ATTACHMENT bushing (Fig. 12). WARNING: To avoid serious personal injury, always wear gloves while handling or WARNING: If the cutting blade is off- installing the blade. center, the unit will vibrate and the blade may fly off, causing possible serious Remove the Cutting Blade personal injury. 1. Align the shaft bushing
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OIL AND FUEL INFORMATION Thoroughly mix the proper ratio of 2-cycle engine oil OIL AND FUEL MIXING INSTRUCTIONS with unleaded gasoline in a separate fuel can. Use a 32:1 Old and/or improperly mixed fuel are the main reasons fuel/oil ratio. Do not mix them directly in the engine fuel for the unit not running properly. Be sure to use fresh, tank. See the table below for specific gas and oil mixing clean unleaded fuel. Follow the instructions carefully for ratios. the proper fuel/oil mixture. NOTE:
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STARTING/STOPPING INSTRUCTIONS On/Off Stop Control STARTING INSTRUCTIONS Stop/Off (O) Start/On (I) WARNING: Operate this unit only in a well- ventilated outdoor area. Carbon monoxide Throttle Lock-Out exhaust fumes can be lethal in a confined area. WARNING: Avoid accidental starting. Make sure you are in the starting position when pulling the starter rope (Fig. 18). To avoid serious injury, the operator and unit must be Throttle Control in a stable position while starting. Fig. 16 To avoid serio
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OPERATING INSTRUCTIONS ™ 2. While firmly holding the add-on, push it straight into OPERATING THE EZ-LINK SYSTEM the EZ-Link™ coupler (Fig. 20). The EZ-Link™ system enables the use of these optional NOTE: Aligning the release button with the guide recess Add-Ons: will help installation (Fig. 19). Blower/Vacuum . . . . . . . . . . . . . . . . . . . . . . . . . . BV720r Cultivator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . GC720r Release Button Edger . . . . . . . . . . . . . . . .
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OPERATING INSTRUCTIONS HOLDING THE TRIMMER Each time the head is bumped, about 1 inch (25.4 mm) of trimming line is released. A blade in the cutting attachment shield will cut the line to the proper length if WARNING: Always wear eye, hearing, foot excess line is released. and body protection to reduce the risk of injury when operating this unit. For best results, tap the Bump Head™ on bare ground or hard soil. If line release is attempted in tall grass, the Before operating the unit, stand in t
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OPERATING INSTRUCTIONS DECORATIVE TRIMMING WARNING: The blade continues to spin after the engine is turned off. The coasting blade Decorative trimming is accomplished by removing all can seriously cut you if accidentally touched. vegetation around trees, posts, fences and more. Rotate the whole unit so that the cutting attachment is at • Swing the unit in the same direction as the blade spins, a 30° angle to the ground (Fig. 24). which increases the cutting action. • After the return swing, move
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MAINTENANCE AND REPAIR INSTRUCTIONS MAINTENANCE SCHEDULE NOTE: Maintenance, replacement, or repair of the emission control devices and system may be Perform these required maintenance procedures at the performed by any non-road engine repair frequency stated in the table. These procedures should establishment, individual or authorized service also be a part of any seasonal tune-up. dealer. NOTE: Some maintenance procedures may require In order to assure peak performance of your engine, special t
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MAINTENANCE AND REPAIR INSTRUCTIONS For Use with Single For Use with SplitLine™ 9. Insert the end of the line into the open hole in the Line ONLY or Single Line inner reel and pull the line tight to make the loop as small as possible (Fig. 33). Slotted Holes 10. Before winding, split the line back about 6 inches. 11. Wind the line in tight even layers in the direction indicated on the inner reel. NOTE: Failure to wind the line in the direction indicated will cause the cutting attachment to opera
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MAINTENANCE AND REPAIR INSTRUCTIONS Cleaning the Air Filter INSTALLING A PREWOUND REEL Clean and re-oil the air filter every 10 hours of operation. 1. Hold the outer spool with one hand and unscrew the It is an important item to maintain. Failure to maintain the bump knob clockwise (Fig. 27). Inspect the bolt inside air filter will VOID the warranty. the bump knob to make sure it moves freely. Replace the bump knob if damaged. 1. Remove air filter/muffler cover. Refer to Removing the Air Filter/
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MAINTENANCE AND REPAIR INSTRUCTIONS Reinstalling the Air Filter/Muffler Cover 1. Place the air filter/muffler cover over the back of the carburetor and muffler. Align the screw holes. Exhaust Spark Bolts Gasket Arrestor 2. Insert the four (4) screws into the holes in the air filter/muffler cover (Fig. 36) and tighten. Do not over tighten. SPARK ARRESTOR MAINTENANCE 1. Remove air filter/muffler cover. Refer to Removing the Air Filter/Muffler Cover. 2. Locate muffler front and the two (2) bolts s
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MAINTENANCE AND REPAIR INSTRUCTIONS NOTE: The cutting attachment should not rotate when CARBURETOR ADJUSTMENT the engine idles. The idle speed of the engine is adjustable through the air filter/muffler cover (Fig. 43). 3. If the cutting attachment rotates when the engine idles, turn the idle speed screw counterclockwise NOTE: Careless adjustments can seriously damage your 1/8 of a turn at a time (as needed), to reduce idle unit. An authorized service dealer should make speed. carburetor adjustme
