OPERATORS

MANUAL

MODEL NO. 975r

IMPORTANT MANUAL

DO NOT THROW AWAY

INTRODUCTION

THANK YOU
Thank you for purchasing this quality product. This modern outdoor power tool has been designed to provide you with 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 entire manual and follow all of the instructions to keep your new outdoor power tool in top operating condition. The other manual that came with your outdoor power tool, the parts manual, contains all of the information that you need to order parts. I. II. III.

TABLE OF CONTENTS

California Emission Regulations..3 Safety Warnings..3-5 Assembly Instructions..6 A. Adjusting the J-Handle..6 B. Installing the Shoulder Strap..6 Oil and Fuel Information..7-8 Starting/Stopping Instructions.9 Operating Instructions..10-11 A. Operating Split Boom Coupler..10 B. Adjusting the Trimming Line Length.11 C. Decorative Trimming..11 D. Edging...11

IV. V. VI.

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.

SERVICE INFORMATION

Service on this power equipment within and after the warranty period can be performed by any Ryobi Authorized Service Dealer. Dial 1-800-345-8746 in the United States and 1-800-265-6778 in Canada to obtain the listing of servicing dealers in your area. DO NOT RETURN UNIT TO RETAILER.
VII. Maintenance and Repair Instructions.12-21 A. Maintenance Schedule..12 B. Line Installation...12-14 C. Air Filter Maintenance..15 D. Carburetor Adjustment..16-17 E. Inspecting/Cleaning the Muffler.17 F. Checking Spark Arrester Screen.18 G. Replacing the Spark Plug.19 H. Checking/Adjusting Valve Clearance.19-20 I. Cleaning and Storage..21 VIII. Specifications...21 IX. X. XI. Troubleshooting Chart...22 California Emission Control Warranty Statement.23 Warranty...24
California Proposition 65 Warning:
PROOF OF PURCHASE WILL BE REQUIRED FOR WARRANTY SERVICE.
MAKE SURE THIS MANUAL IS CAREFULLY READ AND UNDERSTOOD BEFORE STARTING OR OPERATING THIS EQUIPMENT.
THIS PRODUCT IS COVERED BY ONE OR MORE OF THE US PATENTS LISTED BELOW: 5,241,932; 5,176,116; 4,779,405; 4,651,422; 4,589,742; 4,505,040; 4,463,498; 4,356,605; 4,342,235; 4,223,441. OTHER PATENTS PENDING.
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/or grasscovered areas be equipped with a spark arrester, maintained in effective working order. Check with your state or local authorities for regulations pertaining to these requirements. Failure to follow these requirements could subject you to liability or a fine. This unit is factory-equipped with a spark arrester. The replacement part number for the spark arrester is 180890.
CALIFORNIA EMISSION REGULATIONS
The engine of your lawn and garden care product meets the 1995-1998 California emissions regulations. To ensure that your unit continues to meet these regulations, refer to the following information and instructions in this operator's manual. These units are identified by the label on the engine of your product. A typical identification label is shown.

SAFETY WARNINGS

THE PURPOSE OF SAFETY SYMBOLS IS TO ATTRACT YOUR ATTENTION TO POSSIBLE DANGERS. THE SAFETY SYMBOLS, AND THE EXPLANATIONS WITH THEM, DESERVE YOUR CAREFUL ATTENTION AND UNDERSTANDING. THE SAFETY WARNINGS DO NOT BY THEMSELVES ELIMINATE ANY DANGER. THE INSTRUCTIONS OR WARNINGS THEY GIVE ARE NOT SUBSTITUTES FOR PROPER ACCIDENT PREVENTION MEASURES. SYMBOL MEANING

FUEL AND PRE-OPERATIONAL

Fuel is extremely flammable and its vapors can explode if ignited. Always stop the engine and allow it to cool before filling the fuel tank. Do not smoke while filling the fuel tank. Keep sparks and open flames away from the area. Store fuel only in containers designed and approved for the storage of such materials. Pressure can build up in the fuel tank. Loosen the fuel tank cap slowly to relieve any pressure in the tank. Add fuel in a clean, well-ventilated area. Wipe up any spilled fuel immediately. If fuel has been spilled, allow it to dry completely before starting the engine. Move the trimmer at least 3 m (10 ft) from the fueling point before starting the engine. Thoroughly inspect the trimmer for loose or damaged parts before each use. Do not use until adjustments or repairs are made. Avoid accidental starting. Be in the starting position whenever pulling the starting rope. Keep all bystanders, especially children, and pets at least 10 m (33 ft) away from the area. Carefully inspect the areas to be cut. Remove all debris that could become entangled in the string or blade. Also remove any objects that could be thrown during cutting. Before starting, make sure the string head is not in contact with anything. Check the oil before each use.
WARNING: Failure to obey a safety warning can result in injury to yourself and others. NOTE: Advises you of information or instructions vital to the operation or maintenance of the equipment.
SAFETY WARNINGS (Continued)

OPERATIONAL

Wear safety glasses / goggles at all times when operating this trimmer. Dress properly. Do not operate this trimmer when barefoot or wearing open sandals. Always wear sturdy, rubber-soled footwear. The use of gloves, ear/hearing protection and long pants are recommended. Do not wear loose fitting clothing or articles such as scarves, strings, chains, ties, etc. because they could get drawn into the air intake. Also make sure long hair does not get drawn into the air intake. Keep hands, face, and feet away from all moving parts. Do not attempt to touch or stop the string when it is rotating. Do not touch the muffler or cylinder. These parts get extremely hot from operation and remain hot for a short time after the equipment is turned off. Always hold the trimmer with both hands when operating. Keep a firm grip on both the front and rear handles or grips. Operate this trimmer only in a well-ventilated area outdoors. Carbon monoxide exhaust fumes can be lethal in a confined area. If you strike or become entangled with a foreign object, stop the engine immediately and check for damage. Repair any damage before further operation is attempted. Do not operate the trimmer with loose or damaged parts. Use the right tool. Do not use this trimmer for any job except that for which it is intended. Do not force the tool at a rate faster than it is able to cut effectively. Do not overreach. Keep proper footing and balance at all times. Always remain alert. To prevent injury to yourself and others, do not operate this trimmer if you are fatigued. Do not operate the unit while under the influence of drugs, alcohol or any medication. Do not operate the engine faster than the speed necessary to cut, trim or edge. Do not run the engine at high speed when not cutting. The string guard must be in place at all times while operating the trimmer. Always stop the engine when cutting is delayed or when walking from one cutting location to another. Use only genuine replacement parts when servicing this trimmer. These parts are available from your authorized dealer. The use of non-standard parts, or other accessories or attachments not designed for this trimmer, could result in serious injury to the user or damage to the trimmer and void the warranty.

OTHER SAFETY WARNINGS

Store the trimmer in an appropriate and dry location to prevent unauthorized use and damage.
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

SIGNIFICATION
SAFETY ALERT SYMBOL. Indicates caution, warning or danger. May be used in conjunction with other symbols or pictographs. READ OPERATOR'S MANUAL. Failure to follow operating instructions and safety precautions in operator's manual can result in serious injury. Read operator's manual before starting or operating this unit. WEAR EYE AND HEARING PROTECTION. Warning. Thrown objects and loud noise can cause severe eye injury and hearing loss. Wear ear and eye protection when operating this unit.

SYMBOL SIGNIFICATION

FOR SERVICE INFORMATION, CALL: USA: 1-800-345-8746 CANADA: 1-800-265-6778
IGNITION / POWER SWITCH. ON / START / RUN
IGNITION / POWER SWITCH. OFF OR STOP
INDICATES OIL. Refer to operator's manual for the proper type of oil.
UNLEADED FUEL. Always use clean, fresh unleaded fuel.
PRIMER BULB. Push primer bulb, fully and slowly, 5 to 7 times.
CHOKE CONTROL. FULL CHOKE position.
CHOKE CONTROL. PARTIAL CHOKE position.
CHOKE CONTROL. RUN position.
THROWN OBJECTS AND ROTATING CUTTER CAN CAUSE SEVERE INJURY. Warning. Do not operate without guard in place. Keep away from rotating cutter.

ASSEMBLY INSTRUCTIONS

ADJUSTING THE J-HANDLE
The J-handle is shipped completely assembled on this model (Fig. 1). Use the following instructions to adjust the J-handle to the correct operating position. 1. Loosen the four (4) mounting screws on the J-handle. It is not necessary to remove the screws. 2. Slide the J-handle through the clamp until the arrow / white line on the decal touches the clamp assembly (Fig. 2). 3. Position the handle grip as desired (forward and back) and tighten the mounting screws evenly.
INSTALLING THE SHOULDER STRAP
1. Take the end of the shoulder strap without the buckle and push it through the ring on the snap. 2. Loop the strap through the buckle (Fig. 3).

Fig. 3

3. Snap the shoulder strap onto the wire connector (Fig. 4). Adjust the length of the strap as desired.
Handle Position as Shipped Fig. 1 Clamp Assembly Handle Position Decal Fig. 4

Fig. 2

OIL & FUEL INFORMATION
NOTE: BE SURE TO READ THESE INSTRUCTIONS CAREFULLY BEFORE ATTEMPTING TO START OR OPERATE THIS UNIT. Using old or improper oil or fuel can cause engine damage. This type of damage will void the engine warranty.

RECOMMENDED OIL TYPE

Using the proper type and weight of oil in the crankcase is extremely important. Check the oil before each use and change the oil regularly. Failure to use the correct oil, or using dirty oil, can cause premature engine wear and failure. Use high-quality SAE 30 weight oil of API (American Petroleum Institute) service class SG, SF, SH.

Fig. 7

4. Reinstall oil fill plug / dipstick into the crankcase. NOTE: Save the bottle and funnel spout for future use.
NOTE: DO NOT ADD OIL TO THE FUEL.
ADDING OIL TO CRANKCASE - INITIAL USE
Your unit is supplied with one bottle of oil, which contains 100 ml (3.4 fluid oz) of SAE 30 SF, SG, SH oil (Fig. 5). 1. Open the bottle of oil. 2. Install the funnel spout.

CHECKING THE OIL

The importance of checking and maintaining the proper oil level in the crankcase cannot be overemphasized. Check oil BEFORE EACH USE as follows: 1. Make sure the engine is stopped, level (Fig. 7) and is cool so the oil has had time to drain into the crankcase. 2. To keep dirt, grass clippings, etc. out of the engine, clean the area around the oil fill plug / dipstick before removing it.

Funnel Spout

100 ml (3.4 oz) Level
3. Remove the oil fill plug / dipstick; wipe the oil off. Reinsert it into the crankcase. Thread the oil fill plug / dipstick into the crankcase. 4. Remove the oil fill plug / dipstick and check the oil level. The oil level should be up to the top of the dipstick (Fig. 8). 5. If the level is low, add the oil to the top of the dipstick (Fig. 8). Always check the level with the dipstick before adding more oil.

Fig. 5

3. Remove the oil fill plug / dipstick from the crankcase. Pour the entire bottle of oil into the crankcase (Fig. 6). Make sure the engine is level (Fig. 7) for when the oil is poured into the crankcase.
O-ring Full (100 ml/3.4 oz) Add Oil Fig. 8

Fig. 6

OIL & FUEL INFORMATION (Continued)

CHANGING THE OIL

For a new engine, change the oil after the first 10 hours of operation. Thereafter, change the oil after every 25 hours or before storing for an extended period of time. Change the oil while the engine is still warm. The oil will flow freely and carry away more impurities. Change the oil as follows: 1. Remove the oil fill plug / dipstick. 2. Pour the oil into a container by tipping the trimmer in a vertical position (Fig. 9). Be sure to allow ample time for complete drainage. Dispose of oil properly.

RECOMMENDED FUEL TYPE WARNING
Fuel is extremely flammable and its vapors can explode if they are ignited. 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 away from the area. Fill the fuel tank using clean, fresh, unleaded gasoline. NOTE: Alcohol blended fuel absorbs moisture (water). As little as 1% moisture in the fuel can cause fuel to separate and form acids when stored. If this type of fuel must be used, use fresh fuel (less than 60 days old).
DEFINITION OF BLENDED FUELS
Today's fuels are often a blend of gasoline and one or more oxygenates such as ethanol, methanol or MTBE (ether).

USE OF BLENDED FUELS

If you choose to use a blended fuel or its use is unavoidable, the following precautions are recommended. 1. Always use fresh fuel.

Fig. 9

3. Fill the crankcase, with new oil of the proper type, to the top of the dipstick. Use the bottle saved from the initial use. 4. Reinstall the oil fill plug / dipstick and tighten securely. NOTE: Make sure the O-ring is in place on the oil fill plug when checking and changing the oil. To prevent extensive engine wear or damage, always maintain the proper oil level in the crankcase. Never operate the engine with oil level below the bottom of the dipstick.
2. Use the special additive STA-BIL (by Gold Eagle) or an equivalent. 3. Drain tank and run engine dry before storing the unit.

USE OF FUEL ADDITIVES

The use of fuel additive such as STA-BIL Gas Stabilizer or an equivalent, will inhibit corrosion and minimize the formation of gum deposit. Add 23 ml (0.8 oz) per gallon of fuel per instructions on container. NEVER add fuel additives directly to the unit's fuel tank. Using a fuel additive can keep fuel fresh for up to six (6) months.
STARTING/STOPPING INSTRUCTIONS
1. CHECK THE OIL LEVEL IN THE CRANKCASE, FILL THE FUEL TANK AND PUT THE IGNITION SWITCH IN THE "RUN" (I) POSITION. See Figure 11 for the location of the ignition switch. FULLY PRESS AND RELEASE THE PRIMER BULB 5 TO 7 TIMES. See Fig. 12 for the primer bulb location. PLACE THE CHOKE LEVER IN THE FULL CHOKE POSITION. See Fig. 12. NOTE: For a warm engine, go directly to Step 5 (place the choke lever directly in the "PARTIAL" choke position). See Fig. 12.

Ignition Switch

STOP (O) RUN (I)

Throttle Trigger Fig. 11

CHOKE LEVER RUN Position
WITH THE UNIT ON THE GROUND, PULL THE STARTER ROPE QUICKLY UNTIL THE ENGINE SOUNDS LIKE IT WANTS TO RUN (no more than 5 pulls). See Fig. 13. PLACE THE CHOKE LEVER IN THE PARTIAL POSITION (Fig. 12). PULL THE STARTER ROPE QUICKLY UNTIL THE ENGINE STARTS (no more than 5 pulls). See Fig. 13. If the engine does not start, repeat steps 2 to 5. RUN THE ENGINE FOR 30 SECONDS, WITH THE THROTTLE LEVER FULLY SQUEEZED (Fig. 11), TO WARM UP. PLACE THE CHOKE LEVER IN THE RUN POSITION (Fig. 12). NOTE: In colder weather, run the engine for 2 to 3 minutes to warm up.

Wear safety glasses/goggles when operating this trimmer.
ADJUSTING THE TRIMMING LINE LENGTH
Your trimmer is equipped with a bump head that allows the operator to release more trimming line without stopping the engine. To release additional line, lightly tap the trimming head on the ground (Fig. 17) while operating the trimmer at high speed.

Fig. 18

Fig. 17
NOTE: Always keep the trimming line fully extended. Line release becomes more difficult as cutting line becomes shorter.

EDGING

The Split Boom coupler can be used for edging (Fig. 19). Loosen the wing screws, rotate the boom to a 90-degree angle and retighten the wing screws. NOTE: When edging, twist the boom, not the engine, to the proper angle.
Each time the head is bumped, about 25.4 mm (1 in) of trimming line is released. A blade in the weed guard will cut the line to the proper length if excess line is released. For best results, tap the head on bare ground or hard soil.
This model accepts attachments. One of the available attachments is an edger. See page 10 for the list of other available attachments.
MAINTENANCE AND REPAIR INSTRUCTIONS

MAINTENANCE SCHEDULE

These required maintenance procedures should be performed at the frequency stated in the table. They should also be included as part of any seasonal tune-up.

FREQUENCY

Daily or Before Starting Engine Every 10 Hours Every 25 Hours Every 50 Hours Check oil level. Fill fuel tank.

MAINTENANCE REQUIRED

REFER TO:
Pages 7-8 Page 8 Pages 7-8 Page 15 Pages 7-8 Page 19 Page 19-20 Page 18
Change oil after initial use. Clean and re-oil air filter. Change oil. Check spark plug condition and gap. Check rocker arm to valve clearance. Check spark arrester screen.
LINE INSTALLATION FOR THE SPEED SPOOL
The trimming line in the speed spool may be replaced by two different methods: Winding the existing inner reel with new line Installing a prewound inner reel
Winding the Existing Inner Reel with New Line
NOTE: Before installing new trimming line onto the existing inner reel, remove any old line from the speed spool by pulling the line out of the line exiting or locking holes (see Figs. 20 and 21 for location of holes). 1. Line up the arrow on the inner reel with the arrow on the outer spool (Fig. 19). TOP VIEW OF SPEED SPOOL

Bump Knob/ Foam Seal/Spring Assembly

Fig. 27

2. Remove any debris or grass from the Bump Knob/ foam seal/spring assembly, and inner reel. Wash the inner reel with warm soap and water (Fig. 28).

Fig. 25

Releasing the Inner Reel
If the speed spool does not operate correctly when bumping the head on the ground, use the following instructions. 1. Pull the ends of the line firmly away from the spool to release the inner reel (Fig. 26). If this procedure does not release the inner reel, follow the "Cleaning the Speed Spool" instructions below.

Fig. 28

NOTE: The inner reel must be completely dry before reinstalling it into the outer spool. 3. Clean the shaft and the inner surface of the outer spool. To clean the shaft underneath the plunger, press down on the plunger (Fig. 29). Remove any dirt and/or debris from the shaft.

Fig. 26

Cleaning the Speed Spool
If the speed spool becomes difficult to wind or does not operate correctly when bumping the head on the ground, use the following instructions. 1. Remove the Bump Knob, foam seal, spring, inner reel, and trimming line from the outer spool (Fig. 27). Shaft

Fig. 29

4. Install the inner reel and line, spring, foam seal, and Bump Knob into the outer spool (See Fig. 27).

AIR FILTER MAINTENANCE

NOTE: CLEAN AND RE-OIL THE AIR FILTER EVERY 10 HOURS OF OPERATION. Your units air filter is one of the most important areas to maintain. If it is not maintained, you will void the warranty. Before cleaning, make sure the unit is turned off. 3. Wash the filter in detergent and water (Fig. 32). Rinse the filter thoroughly and allow it to dry.
1. Remove the three (3) screws (Torx T-25) on the carburetor/air filter cover assembly. Remove the air filter cover (Fig. 30). NOTE: The choke lever should be in the "PARTIAL" position to remove and install the air filter cover.

Fig. 32

4. Apply enough clean SAE 30 oil to saturate the filter (Fig. 33).

Screws Choke Lever

Screw Fig. 33 Fig. 30
2. Remove the air filter (Fig. 31). 5. Squeeze the filter to spread the oil (Fig. 34).

Air Filter

Fig. 34
6. Reinstall the filter (see Fig. 31), air filter cover and screws (see Fig. 30). Torque the screws to 2.8-3.4 Nm (25-30 inlb).

Fig. 31

NOTE: If the unit is operated without the air filter cover installed, you will void the warranty.

CARBURETOR ADJUSTMENT

This unit is equipped with a diaphragm-type carburetor that has been carefully calibrated at the factory. In most cases, no further adjustment will be required. NOTE: To meet the 1995 California emission regulations, the carburetor has adjustment needle limiter caps to restrict the amount of adjustment. Throttle Lever Idle Speed Screw

The condition of the air filter is important to the operation of the trimmer. A dirty air filter will restrict the air flow, which upsets the fuel-air mixture in the carburetor. The resulting symptoms are often mistaken for an out-ofadjustment carburetor. Therefore, check the condition of the air filter before adjusting the carburetor. Refer to Air Filter Maintenance. If the following conditions are experienced, it may be necessary to adjust the carburetor: The engine will not idle The engine hesitates or stalls on acceleration The loss of engine power that is not corrected by cleaning the air filter, muffler, spark arrester screen or adjusting the valve clearance The engine operates in an erratic or fuel rich condition
High Speed Mixture Needle Idle Speed Mixture Needle

Fig. 35

4. Start the engine and let it run for three (3) to five (5) minutes with the throttle trigger fully squeezed. 5. Release the throttle trigger and let the engine idle. If the engine stops, turn the idle speed screw (Fig. 36) in (clockwise) 1/8 turn at a time (as required) until the engine idles. 6. Final High Speed Mixture Needle Adjustment: a. While squeezing the throttle trigger fully, set the high speed mixture needle at the optimum setting (Fig. 36). See Definition of Optimum Setting on page 17.
The carburetor has three basic adjustments: the idle speed, idle speed mixture and high speed mixture. NOTE: The string guard and line spool must be installed and the cutting line extended to its full cutting length when making carburetor adjustments.

Adjusting the Carburetor

1. Clean the air filter if it is dirty. Refer to Air Filter Maintenance. 2. Make the initial settings with the engine stopped. These initial settings should allow you to start and warm up the trimmer before making the final adjustments. Initial Idle Speed Setting: Back the idle speed screw (Fig. 35) out (counterclockwise) until it does not contact the carburetor throttle lever. Then turn the screw in (clockwise) until it just begins to move the throttle lever; then continue turning 2 full turns. 3. Initial High Speed Mixture and Idle Speed Mixture Settings: Turn both the high speed and idle speed mixture needles halfway between the allowable movement of the limiter caps.
7. Final Idle Speed Mixture Needle Adjustment: Adjust the idle speed mixture needle for smoothest engine idle using the following procedure. Do not squeeze the throttle trigger when adjusting the idle speed mixture needle. a. Set the idle speed mixture needle at the optimum setting (Fig. 36). See Definition of Optimum Setting. b. Turn the idle speed mixture needle out (counterclockwise) to the rich side of optimum.
The engine should idle and accelerate smoothly.
CARBURETOR ADJUSTMENT (Continued)

8. Final Idle Speed Adjustment: Adjust the idle speed by turning the idle speed screw in (clockwise) or out (counterclockwise) until the cutting head does not rotate. Do not squeeze the throttle trigger when adjusting the idle speed screw.
INSPECTING/CLEANING THE MUFFLER
The muffler should be removed every 25 hours of operation to inspect for excessive carbon build-up. Excessive deposits around the exhaust ports or exhaust holes will cause poor engine performance. Use the following procedure to remove, inspect, clean and reinstall the muffler.
Definition of Optimum Setting for Idle Speed Mixture and High Speed Mixture Adjustments
Always set the idle speed mixture needle and high speed mixture needle at the optimum setting. To find the optimum setting, use the following instructions. 1. Turn the adjusting needle out (counterclockwise) from the preliminary setting until the engine speed decreases (rich). Note the position of the needle. 2. Turn the adjusting needle in (clockwise). The engine speed may increase, then it will decrease as the needle is turned in (lean). Note the position of the needle. 3. Set the adjusting needle midway between the rich and lean settings, which is the highest engine speed (Fig. 36).

Removing Muffler

1. Remove the three (3) muffler mounting bolts from the cylinder (Fig. 37). Muffler Mounting Bolt

Muffler Mounting Bolt

Adjust to Midpoint

Lean Fig. 37

2. Remove the muffler and muffler gasket. Discard the old gasket (Fig. 38). Muffler

Muffler Gasket

Fig. 36
NOTE: If the carburetor adjustments do not help the unit to run properly, contact your authorized service dealer. If the limiter caps are removed at any time, your unit will no longer meet the 1995 California emission regulations and you will void the warranty.

Fig. 38

Muffler Reassembly CHECKING SPARK ARRESTER SCREEN
1. Install a new muffler gasket and place the muffler baffle in place (Fig. 40). This unit is equipped with a spark arrester screen. Every 50 hours of operation, check the spark arrester screen for debris and / or deposits. 2. Install the muffler with the three (3) mounting bolts. Install the lower bolt first to ease the installation of the top two (2) bolts (Fig. 41). NOTE: Make sure the muffler is cool before checking the spark arrester screen to prevent injury. NOTE: Check the spark arrester screen as follows: 1. Remove the screw (Fig. 39). 2. Remove the cover (Fig. 39). 3. Push the spark arrester screen out of the cover. Muffler Mounting Bolt Torque the muffler mounting bolts to 40-45 inlb (4.5-5.0 Nm). The 5 mm nut must be held in the slot next to the spark plug before installing the top rear muffler bolt. Be careful not to crossthread the muffler mounting bolts.

Fig. 45

4. Position the crankshaft so the piston is at the top of the compression stroke (the rocker arms are free and loose). 5. Measure the clearance between the valve stems and rocker arms, using a flat feeler gauge (Fig. 46). Rocker Arm Valve

Fig. 47

8. Reinstall the engine cover and screws (see Figs. 43 and 44 on page 19). Torque the top screws to 1.1-1.3 Nm (10-12 inlb). Torque the front screw to 1.1-1.7 Nm (10-15 inlb). Torque the rear screw with washer to 2.8-3.4 Nm (25-30 inlb).

Flat Feeler Gauge

Fig. 46
ENGINE CLEANING AND STORAGE
Always turn off your trimmer before you clean or perform any maintenance on it.

SPECIFICATIONS

Cleaning
Use a small brush to clean off the outside of the trimmer. Do not use strong detergents on plastic housing or handle. They can be damaged by household cleaners that contain aromatic oils such as pine and lemon, and by solvents such as kerosene. Wipe off any moisture with a soft cloth.
Engine Type..Air-Cooled, 4-Cycle Displacement..26.2 cc Bore..32 mm (1.26 in) Clutch Type...Centrifugal Stroke..32.6 mm (1.28 in) Operating RPM..7500 rpm Ignition Type..Electronic / with governor Ignition Switch..Slide Switch Spark Plug..Champion RDZ19H Spark Plug Gap.0.635 mm (0.025 in) Fuel Tank Capacity..450 ml (16 oz) Oil Capacity..100 ml (3 oz)
DRIVE SHAFT & CUTTING HEAD
Drive Shaft...Steel Drive Shaft Housing..Steel Tube, Split Boom Operating Weight..7.14 kg (15.8 lbs) Throttle Control..Finger-Tip Trigger Shoulder Strap...Optional Line Spool Diameter..76.2 mm (3 in) Trimming Line Diameter.2.03 mm (0.080 in) Cutting Path Diameter..406 mm (16 in)

Storage

If the trimmer will be stored for an extended period of time, use the following storage procedure. 1. Drain all fuel from the fuel tank. Do not use fuel that has been stored for more than 60 days. 2. Start the engine and allow it to run until it stalls. This ensures that all fuel has been drained from the carburetor. 3. Drain the oil from the crankcase and add fresh oil. Pull the starter rope a few times to lubricate the engine. 4. Thoroughly clean the unit and inspect for any loose or damaged parts. Repair or replace damaged parts and tighten loose screws, nuts or bolts. The unit is now ready for storage. 5. Store the trimmer in a dry, well-ventilated area, and place the unit flat on the floor (Fig. 48).
COLD TORQUE SPECIFICATIONS
Spark Plug.11.3-12.3 Nm (100-110 Rocker Arm Cover Screw.2.2-3.4 Nm (20-30 Engine Cover Screws (Top)..1.1-1.3 Nm (10-12 Engine Cover Screw (Front).1.1-1.7 Nm (10-15 Engine Cover Screw (Rear)..2.8-3.4 Nm (25-30 Air Filter Cover Screws.2.8-3.4 Nm (25-30 Spark Arrester Screen Screw.1.7-2.2 Nm (15-20 inlb) inlb) inlb) inlb) inlb) inlb) inlb)

CALIFORNIA EMISSION CONTROL WARRANTY STATEMENT
YOUR WARRANTY RIGHTS AND OBLIGATIONS
The California Air Resources Board and Ryobi Outdoor Products (ROP), are pleased to explain the emission control system warranty on your 1995 and later lawn and garden equipment engine. In California, new lawn and garden equipment engines must be designed, built and equipped to meet the State's stringent anti-smog standards. ROP must warrant the emission control system on your lawn and garden equipment engine for the periods of time listed below provided there has been no abuse, neglect or improper maintenance of your lawn and garden equipment engine. Your emission control system may include parts such as the carburetor or fuel injection system, the ignition system, and catalytic converter. Also included may be hoses, belts, connectors and other emission-related assemblies. Where a warrantable condition exists, ROP will repair your lawn and garden equipment engine at no cost to you including diagnosis, parts and labor. The 1995 and later utility and lawn and garden equipment engines are warranted for two years. If any emission-related part on your engine is defective, the part will be repaired or replaced by ROP. OWNER'S WARRANTY RESPONSIBILITIES: As the lawn and garden equipment engine owner, you are responsible for the performance of the required maintenance listed in your operator's manual. ROP recommends that you retain all receipts covering maintenance on your lawn and garden equipment engine, but ROP cannot deny warranty solely for the lack of receipts or for your failure to ensure the performance of all scheduled maintenance. As the lawn and garden equipment engine owner, you should however be aware that ROP may deny you warranty coverage if your lawn and garden equipment engine or a part has failed due to abuse, neglect, improper maintenance or unapproved modifications. You are responsible for presenting your lawn and garden equipment engine to an Ryobi Authorized Service Center as soon as a problem exists. The warranty repairs should be completed in a reasonable amount of time, not to exceed 30 days. MANUFACTURER'S WARRANTY COVERAGE: The warranty period begins on the date the engine or equipment is delivered to the retail purchaser. The manufacturer warrants to the initial owner and each subsequent purchaser, that the engine is free from defects in material and workmanship which cause the failure of a warranted part for a period of two years. Repair or replacement of warranted part will be performed at no charge to the owner at an Authorized Ryobi Service Center. For the nearest location, please contact Ryobi at: 1-800-345-8746. Any warranted part which is not scheduled for replacement, as required maintenance which is scheduled only for regular inspection to the effect of "Repair or replace as necessary" is warranted for the warranty period. Any warranted part which is scheduled for replacement as required maintenance will be warranted for the period of time up to the first scheduled replacement point for that part. The owner will not be charged for diagnostic labor which leads to the determination that a warranted part is defective, if the diagnostic work is performed at an Authorized Ryobi Service Center. The manufacturer is liable for damages to other engine components caused by the failure of a warranted part still under warranty. Failures caused by abuse, neglect or improper maintenance are not covered under warranty. The use of add-on or modified parts can be grounds for disallowing a warranty claim. The manufacturer is not liable to cover failures or warranted parts caused by the use of add-on or modified parts. In order to file a claim, go to your nearest Authorized Ryobi Service Center. Warranty services or repairs will be provided at all Authorized Ryobi Service Centers. Any manufacturer approved replacement part may be used in the performance of any warranty maintenance or repair of emission related parts and will be provided without charge to the owner. Any replacement part that is equivalent in performance or durability may be used in non-warranty maintenance or repair and will not reduce the warranty obligations of the manufacturer. The following components are included in the emission related warranty of the engine, air filter, carburetor, primer, fuel lines, fuel pick up/fuel filter, ignition module, spark plug and muffler.

If you have any questions regarding your warranty rights and responsibilities, you should call 1-800-345-8746.
Limited Two-Year Warranty
RYOBI OUTDOOR PRODUCTS warrants each new RYOBI 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 RYOBI Product manufactured or supplied by RYOBI and found in the reasonable judgement of RYOBI to be defective in material or workmanship will be repaired or replaced by an authorized RYOBI service dealer without charge for parts and labor. The RYOBI Product including any defective part must be returned to an authorized service dealer within the warranty period. The expense of delivering the RYOBI Product to the dealer for warranty work and the expense of returning it back to the owner after repair or replacement will be paid for by the owner. RYOBIs responsibility in respect to claims is limited to making the required repairs or replacements and no claim of breach of warranty shall be cause for cancellation or rescission of the contract of sale of any RYOBI Product. Proof of purchase will be required by the dealer to substantiate any warranty claim. All warranty work must be performed by an authorized RYOBI service dealer. This warranty is limited to ninety (90) days from the date of original retail purchase for any RYOBI Product that is used for rental or commercial purposes, or any other income-producing purpose. This warranty does not cover any RYOBI Product that has been subject to misuse, neglect, negligence, or accident, or that has been operated in any way contrary to the operating instructions as specified in the RYOBI Operators Manual. This warranty does not apply to any damage to the RYOBI Product that is the result of improper maintenance or to any RYOBI Product that has been altered or modified so as to adversely affect the products operation, performance or durability or that has been altered or modified so as to change its intended use. The warranty does not extend to repairs made necessary by normal wear or by the use of parts or accessories which are either incompatible with the RYOBI Product or adversely affect its operation, performance or durability. In addition, this warranty does not cover: A. Tune-ups - Spark Plugs, Carburetor Adjustments, Filters B. Wear items - Bump Knobs, Outer Spools, Cutting Line, Inner Reels, Starter Pulley, Starter Ropes, Drive Belts RYOBI reserves the right to change or improve the design of any RYOBI Product without assuming any obligation to modify any product previously manufactured. ALL IMPLIED WARRANTIES ARE LIMITED IN DURATION TO THE TWO (2) YEAR WARRANTY PERIOD OR NINETY (90) DAYS FOR PRODUCTS USED FOR ANY COMMERCIAL PURPOSE. ACCORDINGLY, ANY SUCH IMPLIED WARRANTIES INCLUDING MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, OR OTHERWISE, ARE DISCLAIMED IN THEIR ENTIRETY AFTER THE EXPIRATION OF THE APPROPRIATE TWO-YEAR OR NINETY DAY WARRANTY PERIOD. RYOBIS OBLIGATION UNDER THIS WARRANTY, IS STRICTLY AND EXCLUSIVELY LIMITED TO THE REPAIR OR REPLACEMENT OF DEFECTIVE PARTS, AND ROP DOES NOT ASSUME OR AUTHORIZE ANYONE TO ASSUME FOR THEM ANY OTHER OBLIGATION. SOME STATES DO NOT ALLOW LIMITATIONS ON HOW LONG AN IMPLIED WARRANTY LASTS, SO THE ABOVE LIMITATION MAY NOT APPLY TO YOU. RYOBI ASSUMES NO RESPONSIBILITY FOR INCIDENTAL, CONSEQUENTIAL OR OTHER DAMAGES INCLUDING, BUT NOT LIMITED TO EXPENSE OF RETURNING THE RYOBI PRODUCT TO AN AUTHORIZED SERVICE DEALER AND EXPENSE OF DELIVERING IT BACK TO THE OWNER, MECHANICS TRAVEL TIME, TELEPHONE OR TELEGRAM CHARGES, RENTAL OF A LIKE PRODUCT DURING THE TIME WARRANTY SERVICE IS BEING PERFORMED, TRAVEL, LOSS OR DAMAGE TO PERSONAL PROPERTY, LOSS OF REVENUE, LOSS OF USE OF THE PRODUCT, LOSS OF TIME, OR INCONVENIENCE. SOME STATES DO NOT ALLOW THE EXCLUSION OR LIMITATION OF INCIDENTAL OR CONSEQUENTIAL DAMAGES, SO THE ABOVE LIMITATION OR EXCLUSION MAY NOT APPLY TO YOU. This warranty gives you specific legal rights, and you may also have other rights which vary from state to state. This warranty applies to all RYOBI Products manufactured by RYOBI and sold in the United States and Canada. To locate your nearest service dealer dial 1-800-345-8746 in the United States or 1-800-265-6778 in Canada.