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Ryobi 780r manual

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Table of contents for the manual

  • Page 1

    FOR QUESTIONS, CALL 1-800-345-8746 in U.S. or 1-800-265-6778 in CANADA www .ryobi.com IMPORT ANT MANUAL DO NOT THROW AW A Y OPERA TOR’S MANUAL 2-Cycle Gas T rimmer/Brushcutter 780r–790r[...]

  • Page 2

    THANK YOU Thank you for buying this quality product. This modern outdoor power tool will provide many hours of useful service. Y ou 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 pow[...]

  • Page 3

    3 W ARNING! SP ARK ARRESTOR W ARNING CALIFORNIA EMISSION REGULA TIONS NOTE: For users on U.S. Forest Land and in the states of California, Maine, Oregon and W ashington. All U.S. Forest Land and the states of California (Public Resources Codes 4442 and 4443), Or egon and W ashington require, by law that certain internal combustion engines operated [...]

  • Page 4

    RULES FOR SAFE OPERA TION 4 • Clear the area to be cut befor e each use. Remove all objects such as rocks, br oken glass, nails, wire, or string which can be thrown or become entangled in the cutting attachment. Clear the area of childr en, bystanders, and pets. At a minimum, keep all children, bystanders and pets outside a 50 ft. (15 m.) radius;[...]

  • Page 5

    RULES FOR SAFE OPERA TION 5 • Always stop the engine and allow it to cool before filling the fuel tank. Never r emove the cap of the fuel tank, or add fuel, when the engine is hot. Never operate the unit without the fuel cap securely in place. Loosen the fuel tank cap slowly to relieve any pr essure in the tank. • Mix and add fuel in a clean, w[...]

  • Page 6

    6 RULES FOR SAFE OPERA TION WHILE OPERA TING WITH CUTTING BLADE • Read and understand all safety warnings before operating this unit. • Always use the shoulder harness when using the brush blade accessory . • Keep the handle between the operator and cutting attachment or blade at all times. • NEVER cut with the cutting blade located over 30[...]

  • Page 7

    7 RULES FOR SAFE OPERA TION SAFETY AND INTERNA TIONAL 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. • WARNING - READ OPERA TOR'S MANUAL Failure to[...]

  • Page 8

    8 RULES FOR SAFE OPERA TION • THROWN OBJECTS AND ROT A TING CUTTER CAN CAUSE SEVERE INJUR Y WARNING: Do not operate without the cutting attachment shield in place. Keep away from the r otating cutting attachment. • ON/OFF STOP CONTROL ON / ST ART / RUN • ON/OFF STOP CONTROL OFF OR STOP • HOT SURF ACE WARNING Do not touch a hot muffler or cy[...]

  • Page 9

    On/Off Stop Contr ol RULES FOR SAFE OPERA TION 9 KNOW YOUR UNIT APPLICA TIONS As a trimmer; • Cutting grass and light weeds. • Edging • Decorative trimming around tr ees, fences, etc. As a brushcutter; • Cutting weeds and light bush of up to 1/2 inch in diameter . Other accessories may be used with the 790r . See list of add-ons on page 17.[...]

  • Page 10

    ASSEMBL Y INSTRUCTIONS 10 INST ALLING AND ADJUSTING THE J-HANDLE 1. Place the J-handle between the top and middle clamp pieces (Fig. 1). (4) Screws T op Clamp J-Handle Middle Clamp Bottom Clamp Nuts 2. While holding the three pieces together , install the four (4) screws thr ough the top clamp and into middle clamp. NOTE: The holes in the top and m[...]

  • Page 11

    Install the cutting attachment shield when using the unit as a grass trimmer . WARNING : T o avoid serious personal injury , the cutting attachment shield SHALL be in place at all times while operating the unit as a grass trimmer . Install the cutting attachment shield on the shield mount by inserting the three (3) scr ews into the shield mount. Ti[...]

  • Page 12

    4. Center the cutting blade on the pilot step of the output shaft bushing (Fig. 11). Guard Mount Fig. 10 ASSEMBL Y INSTRUCTIONS 12 Install the Cutting Blade WARNING: T o avoid serious personal injury , always wear gloves while handling or installing the blade. 3. Place the cutting blade on the output shaft (Fig. 10). Cutting Attachment Locking Rod [...]

  • Page 13

    5. Make sure that the cutting blade is center ed on the pilot step and sitting flat against the output shaft bushing (Fig. 12). WARNING: If the cutting blade is off-center , the unit will vibrate, and the blade may fly off, which can cause serious personal injury . ASSEMBL Y INSTRUCTIONS 13 6. Align the shaft bushing hole with the locking rod slot [...]

  • Page 14

    ASSEMBL Y INSTRUCTIONS 14 Cutting Attachment Locking Rod 4. Remove the nut, blade retainer , and blade. Store the nut and blade together for futur e use in a secure place. Stor e out of reach of children. Install the Cutting Attachment 5. Align the shaft bushing hole with the locking rod slot and insert the locking r od into the shaft bushing hole.[...]

  • Page 15

    15 WARNING: Gasoline is extr emely flammable. Ignited V apors may explode. Always stop the engine and allow it to cool before filling the fuel tank. Do not smoke while filling the tank. Keep sparks and open flames at a distance from the ar ea. WARNING: Remove fuel cap slowly to avoid injury from fuel spray . Never operate the unit without the fuel [...]

  • Page 16

    ST ARTING/STOPPING INSTRUCTIONS 16 4. Place the choke lever in the FULL choke position (A) (Fig. 19). 8. If the engine does not start, repeat steps 4 through 7. NOTE: If the engine floods while trying to start, place the choke lever in the RUN position (C) . Squeeze the throttle control. Pull the starter r ope briskly . The engine should start with[...]

  • Page 17

    CAUTION: The cutting attachment and add-ons with the Click-Link ® system are to be used in the primary hole unless stated otherwise in the specific add-ons operator ’ s manual. Using the wrong hole could lead to personal injury , or damage to the unit. NOTE: For edging with Click-Link ® models, lock the release button of the cutting attachment [...]

  • Page 18

    HOLDING THE TRIMMER WARNING: Always wear eye, hearing, foot and body protection to reduce the risk of injury when operating this unit. Before operating the unit, stand in the operating position (Fig. 24). Check for the following: • The operator is wearing eye protection and proper clothing. • The right arm is slightly bent, and the hand is hold[...]

  • Page 19

    TIPS FOR BEST TRIMMING RESUL TS • Keep the cutting attachment parallel to the ground. • Do not force the cutting attachment. Allow the tip of the line to do the cutting, especially along walls. Cutting with more than the tip will reduce cutting ef ficiency and may overload the engine. • Cut grass over 8 in. (200 mm.) by working from top to bo[...]

  • Page 20

    • Cut while swinging the upper part of your body from right to left. • Always release the thr ottle trigger and allow the engine to return to idle speed when not cutting. WARNING: The blade continues to spin after the engine is turned off. The coasting blade can seriously cut you if accidentally touched. • Swing the unit in the same direction[...]

  • Page 21

    MAINTENANCE AND REP AIR INSTRUCTIONS 21 LINE INST ALLA TION Always use genuine Ryobi 0.095 in. (2.41 mm.) replacement line. Lar ger line may make the engine overheat or fail. WARNING: Do not use metal reinfor ced line. There ar e two methods to replace the trimming line. • Wind the inner reel with new line • Install a prewound inner r eel NOTE:[...]

  • Page 22

    9. Place the spring in the inner reel. Insert the ends of the line through the eyelets in the outer spool and place inner reel inside the outer spool (Fig. 35). Push the inner reel and outer spool together . While holding the inner reel and outer spool, grasp the ends and pull firmly to release the line fr om the holding slots in the spool. NOTE: T[...]

  • Page 23

    MAINTENANCE AND REP AIR INSTRUCTIONS 23 Installing a Prewound Reel 1. Hold the outer spool with one hand and unscrew the Bump Knob ™ counter clockwise (Fig. 29, Pg 21). Inspect the bolt inside the Bump Knob ™ to make sure it moves fr eely . Replace the Bump Knob ™ if damaged. 2. Remove the old inner reel fr om the outer spool (Fig. 29, Pg. 21[...]

  • Page 24

    MAINTENANCE AND REP AIR INSTRUCTIONS 24 6. Replace the air filter in the air filter/muffler cover (Fig. 37). NOTE: Operating the unit without the air filter and air filter/muffler cover assembly , will VOID the warranty . Reinstalling the Air Filter/Muffler Cover 1. Place the air filter/muffler cover over the back of the carburetor and muf fler . N[...]

  • Page 25

    MAINTENANCE AND REP AIR INSTRUCTIONS 25 CARBURETOR ADJUSTMENT The idle speed of the engine is adjustable though the Air filter/muffler cover (Fig 41). NOTE: Careless adjustments can seriously damage your unit. An authorized service dealer should make carburetor adjustments. Check Fuel Mixture Old and/or improperly mixed fuel is usually the reason f[...]

  • Page 26

    MAINTENANCE AND REP AIR INSTRUCTIONS 26 REPLACING THE SP ARK PLUG Use a Champion RDJ7Y spark plug (or equivalent). The correct air gap is 0.020 in. (0.5 mm.) . Remove the plug after every 50 hours of operation and check its condition. 1. Stop the engine and allow it to cool. Grasp the plug wire firmly and pull the cap fr om the spark plug. 2. Clean[...]

  • Page 27

    CLEANING AND STORAGE 27 TRANSPORTING • Allow the engine to cool before transporting. • Secure the unit while transporting. • Drain the fuel tank before transporting. • Tighten fuel cap before transporting. CLEANING WARNING: T o avoid serious personal injury , always tur n your trimmer off and allow it to cool before you clean or do any main[...]

  • Page 28

    TROUBLESHOOTING 28 Engine will not start Engine will not idle Low idle speed Engine will not accelerate Engine lacks power or stalls when cutting Cutting head will not advance line Ignition switch is OFF Empty fuel tank Primer bulb wasn't pressed enough Engine flooded Old or Improperly Mixed Fuel Fouled spark plug Air Filter is Plugged Old or [...]

  • Page 29

    SPECIFICA TIONS 29 ENGINE Engine T ype . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Air -Cooled , 2-Cycle Stroke . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.25 in. (31.75 mm.) Displacement . . . . . . . . . . . . . . [...]

  • Page 30

    NOTES 30[...]

  • Page 31

    31 The California Air Resources Board and Ryobi Outdoor Products (ROP), are pleased to explain the emission control system warranty on your 1995 and later small off-road engine. In California, new small off-road engines must be designed, built and equipped to meet the State's stringent anti-smog standards. ROP must warrant the emission control[...]

  • Page 32

    R YOBI OUTDOOR PRODUCTS warrants each new R YOBI Product for two (2) years according to the following terms. This warranty extends to the original retail purchaser only and commences on the date of original retail purchase. Any part of the R YOBI Product manufactured or supplied by R YOBI and found in the reasonable judgement of R YOBI to be defect[...]